Nenonen’s heritage, pt 3: The Heavies

While the light howitzers might be numerous, there’s no denying that it is their larger counterparts that are supposed to do the heavy lifting, especially in the key sectors of the battlefield. Up until some fifteen years ago, the mainstay in the Finnish heavy brigade artillery was something designated 152 H 88. This was in fact the common name for a modernisation program that had been applied to a number of different WWII-era howitzers, that had been refitted with a new 152 mm L32 barrel and generally brought up to speed. Two of these were the Soviet 152 mm obr. 1937 howitzer (ML-20) and the 122 mm obr. 1931/37  field gun (A-19) that shared the same carriage, while the third was based on the German Immergrün, the 15 cm sFH 18. In total, well over 120 were modified, being designated 152 H 88-37, H-31, and H-40 respectively. In the early 90’s they got company from a similar number of 152 mm D-20 howitzers (152 H 55) bought from ex-NVA stocks, solidifying the Soviet 152 mm as the mainstay of Finnish heavy indirect fire.

6-tuumaisilla on kiirettä.
The 152 H/37, as the original 152 mm obr. 1937 was known in Finnish service, firing on its former owners during the Soviet summer offensive of 1944. 63 years later the last guns would finally be withdrawn from Finnish service. Source: SA-Kuva

The impact of the large artillery buys from the recently unified Germany can hardly be overemphasised. The total number of field artillery pieces grew by 25 % (the number of rocket launchers tripled), the first self-propelled guns arrived in the form of the light 2S1 and the heavier 2S5, and crucially the ratio of heavy to light batteries shifted. 42 % of the Finnish batteries were heavy following the introduction of the large number of D-20s, and the number of batteries per brigade grew to six (i.e. a regiment with one heavy and one light artillery battalion, both with 18 guns). The ratio of heavy to light batteries continued to rise as the decade went on. However, and this was a key factor, as the millennium changed, almost a third of the Finnish heavy batteries consisted of brigade artillery equipped with old Soviet 152 mm howitzers with a range of approximately 16 to 18 km. While they still could provide tactical fires, they were largely unable to perform operational fire missions. Their weight also made mobility, never a strong suit of towed artillery, abysmal. What finally broke the camel’s back was the fact that the shelf-life of the rounds were starting to run out. Finland usually bought packages of artillery that included rounds and other necessary equipment, and the NVA rounds were starting to run out of time.

First to go was the 152 H 88, which was retired in 2007, which it has to be said was not a bad run for a number of guns developed seven decades earlier. In recent years the 152 H 55 has also been struck from record, leaving a total gap of approximately 200 to 250 heavy howitzers compared to twenty years ago. As noted, the material was old and sported a short range, and at the same time there has been a drawdown in the number of infantry units that needed support. Still, the loss of firepower was felt.

An even bigger loss was the 130 K 54 (M-46). The gun was one of the stars of the Soviet Cold War arsenal, being known for it’s range and accuracy. The ability to send a 130 mm  HE-shell over 27 km was no mean feat for a gun that entered production in 1951, and it played an important role in Finnish service as a counterbattery and operational fires weapon. The last of the nine battalions delivered to Finland were retired a short while ago, leaving just a single heavy Russian weapon in service.

152K89 täyspanos late 2019 Marko Leppänen
A 152K89 of Kainuu Artillery Regiment during a live-fire exercise late last year. When firing with a full charge such as here, the gun is capable of flinging out the standard OF-29 HE-FRAG round to over 27 km. Picture courtesy of Marko Leppänen

The 152 mm 2A36 Giatsint is probably better known in it’s self-propelled version 2S5 (a battery of which was found in Finnish service, but is since retired), and 24 are found in Finnish service as the 152K89. In Soviet service these replaced the M-46 as a higher-level asset for roles such as counterbattery fire. However, the 152 mm is a “difficult” calibre for Finland as the 152K89 is the sole weapon using it, and these guns are also on their way out once the ammunition reaches the end of their shelf-life.

To understand what this all means we must go back to the first post of the series that discussed the role of the different guns and their fire missions. In short, Finland has lost 13 heavy batteries handling tactical fires, and another 9 heavy batteries (one of which was self-propelled) handling operational fires and counterbattery missions, with a tenth over-strength operational fires battery soon to join these. As noted, the situation is not as bad as it looks, as the capabilities of the majority of outgoing equipment were quite poor and developments in related fields have improved the quality of fires overall. However, somewhere there is bound to be a gap, and the Finnish Defence Forces wants to plug it.

To begin with we have the K9 order, which will bring 48 top-notch self-propelled heavy howitzers into Finnish service. It’s hard to overstate the impact these will have on Finnish indirect fires, especially in the higher end of the spectrum. The K9 (possibly 155PSH17, though I can’t remember seeing that designation in official FDF sources) will be organised into heavy armoured howitzer batteries, which are a completely new unit type. The fact that they are 48 would seem to indicate two battalions of 24, finally giving the Army the elusive eight-gun battery that is able to perform the shoot-and-scoot carousel where one battery is constantly on the move while two fire (or then there is just a few extras to cover for when some vehicles are on maintenance, but twelve spares for 36 regulars sounds a bit much).

Another key part of the significantly increased operational fires relative to when the 130K54 and 152K89 were first brought into Finnish service is the 41 M270 heavy rocket launchers (officially designated 289 RSRAKH 06). The range and varied munitions they can bring to bear is in a class of their own in the Finnish arsenal.

 

The K9 being dressed up according to Finnish doctrine and customs.

Together, the K9 and the M270 quite nicely cover the gap in operational fires left by the 130K54 and the 152K89. At the same time, the 132 Finnish-built towed 155 mm guns (about two-thirds of which are the older 155K83-97 with the L39 barrel and the rest being the newer 155K98 with L52 barrel and APU) are also able to do operational fire missions, so there doesn’t seem to be too much of gap in the higher end of the indirect fire capability (especially once the air-to-ground capability of the Hornet-fleet and the upcoming HX-fleet are added to the equation, though they will probably have no shortage of wartime missions so the ground-pounding will probably be somewhat limited).

Side note: at this point someone might ask if one really should do OSINT on the number of own artillery pieces. The answer is that the FDF report them to the world as part of the OSCE’s Vienna Document undertakings, so this isn’t really OSINT as much as basic googling-skills

The problem then is the tactical fires, which as we have now seen largely rest with the to-be-retired 122H63 light howitzer, the Finnish-built 155K83-97 and 155K98, and a limited number of  122 mm RM-70 rocket-launchers (122RAKH89, also from ex-NVA stocks). The exception is the mechanised and heavy motorised (tracked) battlegroups which have a total of 74 self-propelled light howitzers in the form of the 2S1 Gvozdika (122PSH74) for their tactical fire support. The number nicely matches the reported 2+2 battlegroups all getting a battalion of 18 guns each. There has been speculation that the first K9s would replace the 122PSH74, but that seem unlikely for a number of reasons. To begin with, the role of the 122PSH74 is squarely tactical fires, it is in essence a mobile D-30 that provide some cover to the crew. Granted if the battlegroups have the equipment, their artillery batteries could be allocated operational fire missions, but permanently allocating the most powerful guns available to the Finnish Army to individual reinforced battalions does not seem to guarantee the greatest use of them, and fits poorly with the concept of modularity found in the Finnish artillery doctrine. It should also be noted that the unit type is described as “completely new”, and that then-MoD Jussi Niinistö in his official blog clearly mentioned that they are to replace towed equipment.

These are replacing towed artillery that is becoming obsolete and retired during the next decade [the 2020’s]

In addition, it rhymes poorly with the relatively recent modifications to bring up at least part of the 122PSH74 fleet to the new 122PSH74M-standard, which is described in Panssari 2/2014 as including a serious overhaul of the communications equipment as well as various C2-systems, all meant to increase the speed of operations (the upgrade also feature a light-machine gun on the roof of the vehicle, as the importance of being able to fend of enemy infantry has grown with the increased fragmentation of the battlefield).

122PSH74M Pohjoinen 18 Maavoimet FB
122PSH74M firing during exercise Pohjoinen 18. Source: Maavoimat FB

It is important to note exactly how different the two self-propelled guns are. The 122PSH74 tips the scale at 15.4 tons and has a footprint of 7.3 x 2.9 meters, while the K9 weighs in at 46.3 tons with a footprint of 12.0 x 3.4 meters (hull length being 7.4 m). While the 122PSH74 isn’t exactly an off-road jeep, the light gun vs. heavy gun comparisons certainly are at play here as well as for their towed counterparts, with the operational mobility being quite a bit simpler to handle when you need a trailer rated for 16 tons compared to one rated for 45+ tons.

So then we are back to a situation where there are a number of modern 155 mm guns (and some heavy rocket launchers) handling the operational fires and a large number of light guns being responsible for tactical fires. With the light ones being on their way out, bringing us back to the questions asked in last post.

The light guns, including both 122H63 and 122PSH74, currently make up something between 75 to 80 % of the total force (depending on how many K9 have arrived and whether you count the 152K89 or not). Using current equipment, as discussed in the last post the towed 155K83-97 could trickle down to cover up the 122H63-gap, and the 155K98 could continue to provide firepower for the operational brigades. However, there is still a few places were things are looking thin:

  • The four battalions of 122PSH74 that support the mechanised and motorised battlegroups,
  • The reduction by perhaps 85 % in the number of guns supporting regional and local troops following the withdrawal of the 122H63,
  • Whether the towed 155K98 really is the weapon of choice for the operational brigades.

The answer to the first is probably more K9s, at least partly. Finland has an option for more vehicles, which would simply continue deliveries after the current batch of 48 vehicles have been shipped. How many is an open question, as another four battalions (especially if they are 24-gun strong) seem prohibitively expensive. Getting two battalions (i.e. another 48 guns) for the two mechanised battlegroups might be doable.

Conscript driver training oct 19 PSPR FB
The first conscripts started training on the K9 Moukari last year, replacing the 122PSH74 as the training platform at the peacetime Jääkäritykistörykmentti (Jaeger artillery regiment). Note the sheer size of the vehicle compared to the crew. Source: Panssariprikati FB

And that leaves two motorised battlegroups and either the operational brigades or the regional units needing more firepower. Looking at the requirements, getting a new towed piece (or transferring the 155K98) to the motorised battlegroups likely doesn’t cut it. The same can probably in all honesty be said for the operational brigades. At least once it is clear something new has to enter the organisation at some level, one can do worse than insert the new stuff at the top and let the old cascade down.

 

Which brings us back to everyone’s favourite emperor-acronym, Nexter’s CAESAR (CAmion Equipé d’un Système d’ARtillerie). The idea is rather simple, and there is something very Finnish about of marrying what is in essence a tested gun (the towed TRF1) to a truck chassis to give the gun shoot-and-scoot capability. I discussed the system at length in an earlier artillery post, so without rehashing everything again:

  • It is a proven design, including having seen combat in harsh conditions,
  • It offers the firepower expected from modern 155 mm L52 systems,
  • The ability to relocate on it’s own wheels adds significantly to both strategic and operational mobility,
  • The French decision to over time let the CAESAR replace all 155 mm systems in service (i.e. the tracked AUF-1TA and the towed TRF1) means that there is a long-term commitment from France to keep the production line (as well as modernisation programs) up and going.

This combination, including the last part, is important, as surely someone will point out the benefits of the Israeli ATMOS, the Mandus Group BRUTUS, and the Swedish Archer. The ATMOS is most closely related to the CAESAR when it comes to the basic concept, while the Archer is a more high-end system with it’s 21 pre-loaded rounds in the magasin. The BRUTUS is the bigger brother to the 105 mm Hawkeye we discussed last time around, and sport a low-recoil 155 mm howitzer which allows the carrier platform to be smaller (and the company to make the obvious #IdesofMarch-jokes). All systems, including the Archer as was shown at DSEI last year, are modular and to a certain extent carrier agnostic. While the differences between the systems are small enough that it will come down to how their respective strengths and weaknesses are evaluated rather than to one of them being objectively better than the rest, for some there isn’t the kind of long-term commitment to the projects by the host countries as is enjoyed by the CAESAR, while others are just now entering service/being tested.

The general drive towards wheeled platforms for artillery is interesting, and something that Watling spent quite a bit of time on in theRUSI report:

However, for every eight [tracked] AS90 howitzers, there are a further six command and support tracked vehicles in the battery, a tactical group of at least five vehicles and the necessary CSS [combat service support] to maintain the guns, repair them when they throw tracks, or recover them when damaged. An Armoured Infantry Brigade meanwhile includes 56 Challenger 2 MBTs, while the brigade also needs to move bridging equipment, its infantry fighting vehicles and CSS assets. The British Army has between 71 and 92 HETs [M1070F tank transporters] available.

[…]

There is a trade-off between wheeled systems, which can self-deploy and have significant strategic mobility, versus tracked platforms, which retain much greater tactical mobility, especially in wet and uneven terrain. It is important to note that the differences between these platforms are declining […] This has led the IDF – despite fighting in a small area – to conclude that the operational reach of wheeled artillery is disproportionately valuable to the tactical mobility of tracked guns. It must be noted that they face a much less significant counter-battery threat, and therefore can have less protection. Wheeled platforms, however, require fewer specialised CSS elements and can therefore move with a smaller logistical tail. As a result, they reduce the overall number of chassis needed to deliver an effect.

What Watling doesn’t mention in the quote above is that this translate directly into money. The difference between the new-built Danish CASESARs coming in at 2.7 million Euro per piece compared to the Finnish ex-ROK K9s at 3.0 million Euro a piece isn’t huge, usual caveats about these not being apples-to-apples comparisons apply (though this is also a good time to point out what a good price PVLOGL got). However, the difference in operational costs most likely are very different (no-one’s going to release anything resembling comparable figures for those, so this is an educated guess based on training requirements, maintenance needs, weight, supporting vehicles/heavy loaders, …). The decision to use a truck-based resupply solution for the K9s also make the argument of the superior tactical mobility of tracks compared to wheels somewhat less persuasive.

One interesting aspect of the CAESAR is the difference between the baseline French (and earlier export) versions, and the latest Danish vehicle that is mounted on the significantly larger classic Tatra T815 8×8 compared to earlier 6×6 carriers. This gives the vehicle not only significantly better off-road mobility, but also a larger number of rounds being carried on the gun (30 being the new standard as opposed to 18 on the French 6×6 version. This can be further increased if a lower number of charges are carried), a new protected cabin (STANAG 4569 Level 2a/2b), and the munitions handling system seen in action in the video above. A new muzzle velocity radar and a thermal imaging sight for direct fire are also fitted.

Sisu E15 TP-L Leguan bridge Saber Strike 18 - Maavoimat FB
You don’t always need tracked platforms, as the Sisu E15 TP-L Leguan bridge layer shows here at the Saber Strike 18. Source: Maavoimat FB

The CAESAR is in many ways the epitome of the kind of good-enough system that the Finnish Defence Forces likes. Especially in cases where the rest of the unit also runs largely on wheels, the tracks and size of the K9 is making things somewhat complicated. An interesting comparison is the Leguan-bridge, which the Finnish Army uses on the Leopard 2-chassis for heavier units and mounted on a Sisu all-terrain truck for lighter ones. There’s no doubt that a CAESAR, or another wheeled self-propelled gun, would feel right at home in the Satakunta Artillery Regiment of the Pori Brigade.

To sum it up, in such a scenario the Army would eventually post-122 mm howitzers (~2030) sport a tube artillery consisting of 48 K9 dedicated to higher-level operational fires, 36 K9 for supporting two mechanised battlegroups, 72 to 108 wheeled SPGs (four to six batteries) for supporting the other operational battlegroups and brigades, and 130-ish Finnish-built towed 155 mm guns to provide the heavy hitting power of the regional troops. The bottom end would then need further 120 mm mortars or a new light gun, as per the last post.

charlie_battery2c_1st_battalion2c_12th_marine_regiment2c_fire_an_m982_excalibur_round_from_an_m777_howitzer
Marines with Charlie Battery, 1st Battalion, 12th Marine Regiment, fire an M982 Excalibur round from an M777 howitzer during a fire support mission in Afghanistan in 2011. Source: USMC via Wikimedia Commons

And just when things started to look quite straightforward – wholesale K9-introduction is too expensive while no-one builds a basic towed gun anymore, let’s go wheeled – there suddenly just might appear the possibility for another cheap surplus buy, as the USMC proposes that they get rid of the majority of their tube artillery. Provided that the suggestion passes through the political hurdles (something that is far from certain) and that the equipment isn’t just mothballed for future use, it might suddenly mean that there is 96 surplus M777A2 towed howitzers up for sale. And there aren’t necessarily too many interested buyers.

The M777 is one of those modern towed howitzers that are built to be as light as possible, which is reflected in the price. 2009 the USMC bought a batch of guns (together with the Canadian Army the total order was 63 M777A2) for 1.9 million USD per gun. If, and this is quite a big “if”, the whole or better part of the 96 gun batch eventually are sold as surplus, they would nicely make up the replacement for the heavy brigade firepower lost with the short-ranged 152 mm howitzers. Buying more towed artillery at this point certainly does sound like something of a step back. However, swapping out the 152H55 for the M777 would certainly still be an improvement when it comes to mobility, based on the simple fact that the M777 weighs in at 4,100 kg, well below the 5,700 kg of the 152H55 (and just above a quarter of the 16,000 kg of the longer-ranged 155K98). The M777 with it’s L39 can also throw unassisted HE projectiles out to 24,700 meters compared to the 17,400 meters of the 152H55, which though still short of the 27,000 meter range of the 155K98 would provide a serious boost in brigade-level firepower. Swapping towed howitzers to (lighter) towed howitzers would also be a relatively simple change in the OOB.

MVH1 2015 Maavoimat FB
Even when it comes to towed heavy artillery, not all are created equal in terms of mobility and ease of handling, something that is often forgotten in the towed vs. self-propelled debate. Source: Maavoimat FB

In this scenario, the domestic 155K98 and 155K83-97 would be used by the operational brigades, with the M777 replacing the outgoing regional brigade artillery and possibly a handful of the most important of the 122H63 batteries. This still leaves the question of a 122PSH74 replacement open (self-propelled heavy mortars, anyone?), and is dependent on the highly speculative possibility of a cheap buy of the better part of the USMC guns that might be retired in the near future. However, the underlying conclusion is that there is bound to be a gap in firepower somewhere, and I would be highly surprised if there are no new 155 mm systems that enter Finnish service within this decade.

Nenonen’s heritage, pt 2: The Curious Case of the Light Gun

Looking purely at numbers, the most important Finnish artillery piece is the 122 mm D-30 (or 2A18 as the GRAU-designation goes), 471 of which are found in the Finnish arsenal. Finland was amongst the first waves of export customers when the then brand new light howitzer was acquired in the early 1960’s. At that time it was seen as a brigade-level asset and constituted the first modern post-war artillery system of the Finnish Army. The gun came with a host of new capabilities, including the ability to fire at very steep angles of attack, giving it significantly greater capabilities in urban terrain, as well as the innovative base that allowed a full 360° firing arch, the latter especially useful when using the gun in the direct firing role to fight of any enemy’s that might have been able to sneak up on the gun position from an unexpected direction.

122H63 Maavoimat FB Henri Hakulinen
122H63 being fired. Source: Maavoimat FB/Henri Hakulinen

Things have changed, however, and today the venerable light howitzer is relegated to the battalion support role. Here it soldiers on, the 122 mm being the sole Soviet-era calibre not to be counted amongst the “difficult” calibres that the FDF has been trying to replace for quite some time already. It looks like the current schedule is that “at least part of the towed 122 H 1963 howitzers” will stay in service towards the end of the decade. However, while the gun currently handles “fire support of infantry and jaeger brigades as well battlegroups”, especially in the case of the regional and operational units time is running out. 15,400 meter range just doesn’t cut it for a towed system if one tries to keep maintaining mutually supportive coverage of a number of moving companies and battalions according to the current Finnish infantry doctrine.

Before discussing possible replacements, one need to remember why the Army has light guns to begin with, as on the surface everything is better in 155 mm. The answer boils down to a number of factors. One is undeniably cost. The 122H63 was and is cheap. It’s cheap to acquire, cheap to operate, and fire cheap rounds. This ties in with the logistical footprint, as the rounds are smaller, a significantly larger number of rounds can be ferried around for any given volume and weight compared to 155 mm. Granted the effect per round is smaller, but in several fire missions, especially when doing suppressive fire, the number of rounds available counts more than the size of the individual bang. As current Finnish artillery doctrine dictates that the guns need an abundance of rounds stored in the forward gun positions, this is an area where the smaller 122 round shines.

Overall, it is seldom recognised just how big a difference the smaller size makes for the whole logistical chain. It’s not just that the gun is smaller, but the vehicle towing it can be smaller as well (or, alternatively, go places where it couldn’t with a heavier towed cargo). The ammunition supply train can be lighter throughout, either translating into more rounds carried per supply run or by having lighter vehicles do the runs. This further brings down the operating cost, and yet again contributes to a smoother logistical flow, which is felt also indirectly in issues such as mobility (in the sense of where one can go with the battery and still have an adequate supply train).

The issues are, however, obvious. The short range was already mentioned, and while the upper end of the spectrum has seen significant leaps in firepower through the improvement of both the guns and the rounds they fire, similar developments have been largely absent in the lower tiers of the artillery. In part this is driven by the simple fact that it makes sense that new technological developments are first introduced in the higher-end systems, from where they usually then trickle down. However, this trickling down has been curiously absent, leaving systems such as the 1970’s vintage British 105 mm gun L118 (M119 in US service) as amongst the most modern guns in service. One reason is likely that several of the benefits of the light gun over the heavier ones – ease of handling, affordability, and lack of complexity – run contrary to developments such as longer barrels and auxiliary power plants. Developments in rounds, including both guidance and sensor kits as well as sub-munitions, are usually size-restricted in that the “extras” are of the same size regardless of whether you try to squeeze them into a 122 mm shell with a 14 km range or into a 155 mm one with 30 km range. Crucially, that leaves less room for the exploding stuff that is supposed to provide the effect, so while it isn’t necessarily impossible to create guided light gun rounds, their drop in effect compared to ‘dumb’ HE-rounds in their calibre is significantly larger than what is the case for 155 mm rounds.

Regardless of the reason, the fact is that the gap in firepower between light and heavy systems is widening both in absolute and relative terms. And as several countries struggle with having a harder time funding and manning their armed forces in general (and with the artillery arms being no exceptions) the light guns have in many cases struggled to justify their existence (especially when it comes to upgrade and acquisition programs).

Nothing of this is particularly new, but rather the trend has been going for quite some time. The Finnish Army has been able to kick the can forward through the large starting number of 122H63s, relatively recent surplus buys in the 90’s, and allowing the retirement of the most worn ones as the total number of batteries has shrunk. Still, everything has an end, and there simply isn’t an obvious replacement.

As noted, buying a new towed gun to replace like-for-like is difficult even without considering the value of a towed gun on the battlefield of 2040. That’s because there are extremely few offerings. Denel of South Africa produced a technology demonstrator 105 mm gun called Light Experimental Ordnance (LEO, with a series produced gun being designated G7) that started test firing in 2001. The system is probably the most impressive weapon of its class, sporting ranges of 24,600 meters with standard ammunition while keeping a light total weight. The main issue is that it is not a ready operational weapon, and Denel has been open with the fact that quite a bit of work remain until it can be one. Coupled with the somewhat uncertain future of Denel and the South African arms industry in general, these are likely factors that significantly lowers any potential Finnish interest in acquiring the system.

m-56-33_105mm_-_partner_2019_-_1
The M56-2, also designated M56/33, at a trade show last year. The external resemblance to the classic 10.5 cm leFH 18/40 (105 H 33–40 in Finnish service) is evident. Source: Srđan Popović via Wikimedia Commons

Another of the very few countries that offer modern-ish towed guns is Serbia, which politically isn’t the first choice for a major Finnish arms contract, but still might be doable. While they offer a number of upgraded versions of the D-30 and the US M101, they also sport a domestic 105 mm howitzer which in the newest version is designated M56-2. The weapon traces it’s lineage to concepts found in the German leFH 18/40 (yes, this sounds bad, but it’s not quite as bad as it sounds), but fitted with a new L33 barrel it can push HE-rounds some pretty impressive distances downrange. Besides the basic US-pattern ammunitions, a number of longer-ranged rounds exist. These include a boat-tailed round with 2.85 kg of TNT and a maximum range of 15 km, and a base-bleed round capable of putting the same amount of TNT at a target 18 km away. The standard M1 HE-round has a maximum range of 14.5 km, with a new locally developed charge.

I would be, and I can’t stress this enough, highly surprised if the M56-2 would enter Finnish service. At the same time, this comes with the caveat that it wouldn’t be the first procurement decision to surprise me, and if the Army decide that they just want a basic (if crude) solution they can drop into the current organisation, there aren’t that many alternatives.

ISAF Soldiers Fire a 105mm Light Gun
The 7 Parachute Regiment, Royal Horse Artillery, fire their 105 mm L118 in support of patrols from the 3rd Para near Kajaki, Afghanistan, in 2008. Note the Selex ES LINAPS mounted on top of the barrel close to the breech. Source: Sgt Anthony Boocock, RLC/MOD via Wikimedia Commons

The obvious alternative instead is the British L118/M119 105 mm light gun. Despite it’s age, it is still quite a bit younger than the D-30, and, crucially, in service with a number of Western countries that have spent time and resources on keeping it up to date. It does beat the D-30 in the number game as well, being shorter and slightly narrower in transport configuration, having a faster rate of fire, and a longer range. With a combat weight of just under 2,000 kg, it is also quite a bit lighter than the D-30 than tips the scale at around 3,200 kg (somewhat depending on configuration). And while I decried the lack of great innovations on the scale we’ve seen amongst the heavy hitters in the start of this post, there’s no denying that the latest versions of the L118 is vastly superior to those rolling of the assembly lines in 1975.

A key part of this was the US upgrades to M119A2/A3-standard, (the A3 differing from the A2 in having a digital fire control system that uses “90% of the software derived from the 155 mm M777A2”) as well as an MLU-project and the fitting of the Selex ES LINAPS artillery pointing system (yes, really) on the UK guns. The LINAPS is mounted on the barrel and include an integrated INS/GPS system, a large touch-screen to control the software, an odometer keeping track on the distance travelled, and a muzzle velocity radar. In essence, it is a small computer that keeps track on where the gun is, where it is pointing, and then tells the crew where to shoot in order to hit the target they want to shoot at. In essence, this is roughly similar to what the new FCS of the M119A3 does, and what both does in the field is that they allow the crews to start shooting (and hitting) significantly quicker than what has been the case earlier when the position of the gun has been decided by external means.

The nicest part about the L118/M119 is without doubt the sheer number of units, with over 1,100 guns having been produced (though observant readers will note that a Finnish one-for-one replacement of 122H63 would mean increasing the total number of L118/M119 production with 43%, further highlighting just how unique the Finnish artillery park is). The status as the de facto standard light gun in the Western world means that there are ample upgrades and improvements being offered for it, including both for the gun itself and for the rounds it fire. The UK version has a stated max range of 17,200 meters with HE-shells and charge “Super” (15,300 meters with charge number five), while the US has adopted the M1130 HE FRAG with base-bleed as their standard HE-round going forward. This South African Rheinmetall Denel Munitions developed round is capable of reaching out to 17,500 meters. The airmobility and widespread use, including in a number of export countries, means that even if the regular Army units of the US and UK were to start replacing the system, it would still have a considerable user base for years to come.

Operation IRAQI FREEDOMReleased 10 August 06 by Major Bren Workman IO for the 506th Regimental Combat Team, 101st Division
The nice thing about light guns is that their rounds are light, as demonstrated here by the loading of a 105 mm round into a M119A2 of the 320th Field Artillery, 506th Regimental Combat Team, 101st Airborne Division. The 101st is one of at least three US Army divisions (together with the 82nd and 10th) that are likely to continue to use light guns for the foreseeable future. Source: U.S. Navy photo by Mass Communication Specialist 1st Class Keith W. DeVinney via Wikimedia Commons

But is another towed gun really what is needed? This is a surprisingly hard question to answer, and more so for the light guns than for the heavy ones. As noted, much of the benefit of the lighter platforms stem from the fact that they are small, cheap, and lack the complexity of the larger ones. Sticking the gun on a vehicle can easily defeat the purpose of having light guns. This is especially true for tracked platforms, as they will add not only the complexity of a vehicle, but the added complexity of tracks and the need for a transporter, adding several layers of maintenance and manning requirements that especially the less prioritised units of the Finnish Army can ill afford.

For a wheeled platform, the trade-off isn’t as bad. In theory at least, the towing vehicle can be replaced (though depending on the setup, a truck might be needed for ammunition and crew transport), leaving the same number of wheeled platforms in the unit as before. The platform also is likely to be of roughly the same size and mobility as the current tower, meaning integration is easier than for a tracked one. The big benefit is obviously the survivability that comes from being able to quickly move in and out of firing positions, which is a big benefit, especially in more contested sectors of the front.

Finland’s new best friend when it comes to artillery, the South Korean company Hanwha Techwin, has the EVO-105 which in essence is a 6×6 truck featuring an M101 105 mm howitzer on top. Despite the somewhat archaic outlook, it is actually just on the verge of entering service. For the standard M1 HE-round the maximum range is 11,300 meters, which can be described as lacklustre. However, there is a remedy as the company also has an upgraded version of the weapon itself on offer, designated KH178. Changing out the baseline M101 to the KH178 with a L34 barrel it is possible to achieve ranges of up to 14,700 meters for the M1, or 18,000 meters using rocket assisted projectiles. The KH178 is an old upgrade program dating to the 80’s, and unless a really nice deal can be had on surplus howitzers coming from the large South Korean stocks, there is little use in getting the towed version. On the EVO it is marginally more interesting, but truth be told this isn’t the most elegant solution out there, and since it’s unlikely to be the cheapest, it is likely not a serious contender.

m09_105mm_sph_02
The M09 sporting the 105 mm M56 howitzer. Another light gun truck that is extremely unlikely to ever enter Finnish service. Source: Srđan Popović via Wikimedia Commons

Our aforementioned Serbian friends pushes a number of different configurations through the Yugoimport brand, including putting the M56 into an armoured turret and calling it the M09, as well as putting different derivatives of the D-30 on truck chassis in both turreted and unprotected configurations. The idea of putting D-30’s on truck to give them mobility is widespread, and if Finland decided to go down that road Serbia just might be a possible partner (though in that case the Finnish version would probably be based on a domestic, or Swedish, chassis). At least it makes more sense than Sudan and the Khalifa

Political considerations effectively take out a number of other designs as well. China and Russia are obviously both still very much in the business of both towed and self-propelled guns of all classes, including in western calibres for export purposes, but neither country won’t receive any RFI’s any time soon. One company that probably will, however, is Mandus Group.

The Hawkeye is a soft-recoiling 105 mm gun mounted on a M1152A1 HMMWV, giving the light gun a significantly smaller platform than the 6×6 used by most other examples. Early versions shown used the M102, but a more recent demonstrator has been fitted with the M119. This could potentially be a really nice way of handling the need for light fires, marrying a tried-and-tested 105 mm gun to a tried-and-tested chassis, offering high mobility and a small logistical footprint. The shorter range compared to the current 122H63, just 11,600 m with the standard M1 HE shell (it can reach 19,500 meters with a M193 HE RAP), it partially offset with the higher mobility.

The big deal here is obviously that no-one has bothered buying the concept, at least not yet. And a Finnish launch order for a few hundred Hawkeyes doesn’t seem likely. We are quickly approaching the space where the only current Finnish indirect fire system comes into play.

The Patria NEMO is a 120 mm turreted mortar system, and while mortars aren’t exactly light guns, they do offer a number of qualities on their own. The NEMO is the lighter single-barrelled brother to the AMOS that is currently in service in limited number with the Finnish Army, and could potentially be integrated into a number of different platforms (8×8 or 6×6). While the range is shorter, typically just over 10,000 meters, the mortar shells does offer more explosives thanks to their thinner casings (3.1 kg in the case of the MEHRE round marketed for AMOS/NEMO use). The advantage of turreted mortars is also that they allow for direct-firing as a self-defence option. There is also a clear logistics chain for mortars already in place, and adding more towed and self-propelled mortars might provide the lo-hi mix needed to fit inside the (limited) funds available to replace the 122 mm howitzers.

Because lets face it – there’s likely not a one-size-fits-all solutions to the retirement of the 122H63. Some units will likely see their light batteries converted to towed heavy mortars, while for others that simply won’t cut it and something heavier hitting and/or more mobile will be needed. I would not be surprised if a number of L118/M119 are bought at some point, but their number likely won’t be anything near 470. If so, these would likely occupy the middle ground, being used in light battalions for some of the regional forces, with a number of towed mortars acquired to the less lucky ones. If mobility is seen as an absolute requirement for a future mid-range system, a 120 mm mortar on the back of a truck is probably the answer. Hawkeye and NEMO would be nice, but I just don’t see the money for any major buys of these (though the possibility of acquiring them in small numbers for prioritised battlegroups as was done with the AMOS remains, see e.g. my ongoing grievance about the lack of a boatmounted indirect fire system for the coastal jaeger battlegroup).

122H62 suora-ammunta Marko Leppänen
The crew of a 122H63 practising direct firing. The possibility to use the gun for close-in-defence against enemy vehicles or infantry is one of the benefits that a towed gun have over mortars, though the weight this factor should have in evaluating the systems is questioned. Picture courtesy of Marko Leppänen

One of the issues occupying the minds of the Finnish artillery planners is also the inability of light guns to fire special munitions, including precision guided shells and dedicated sensor-fused anti-tank munitions such as BONUS II. If this capability is to be rolled out wider, either more heavy battalions are needed, or mixed battalions with one heavy and two light batteries will start to appear among the infantry brigades.

Which brings us to one last interesting example. Singapore, another country known for their domestic artillery production, used to rely on the Nexter (formerly GIAT) 105 mm LG1 light gun for their light fires up until this side of the year 2000. These have however been replaced by the lightweight ST Kinetics Pegasus, a towed 155 mm gun sporting a L39 barrel and an APU to move the system into firing positions. While acquiring a new-built towed 155 mm gun with a L39 length barrel does sound like an anachronism in a world of self-propelled L52-systems, it is important to remember that the comparison here is with the towed 122 mm. The Pegasus has all the niceties expected of a modern 155 mm gun, including a powered ammunition loading system allowing for a burst of three rounds in 24 seconds (or a sustained rate of 4 rounds/min for three minutes, after which it drops to one round every half minute) and as mentioned an APU. The gun has an interesting design, sitting on a box-shaped base when in firing mode rather than using a split tail, further adding to it’s compact nature. The L39 barrel does suffer a bit when it comes to range, but at 19,000 meters for a standard HE shell and 30,000 meters for a base-bleed HE it’s still vastly superior to any light guns out there. The weapon is designed to be able to fire “all kinds of 155 mm projectiles and charges”, a key detail as it is the last piece of the puzzle to convert the Singapore artillery to an 155 mm-only force (following the towed 155 mm L52 FH-2000 and L39 FH-88 as well as the self-propelled Primus).

Singapore Artillery conducts the first live-firing of the Pegasus during Exercise Thunder Warrior Singapore MoD
Two Pegasus during live firings at Exercise Thunder Warrior. Note the low position of the breech as the gun is resting on the base plate. Source: Singapore MoD

The Pegasus might not be the answer to the Finnish artillery needs, as while I haven’t been able to find a quoted price for it, words like ‘lightweight’ and ‘titanium’ are usually indicators that it won’t be cheap. However, the general idea of shifting 155 mm guns down in the hierarchy to replace light batteries might well be part of the eventual solution. The obvious candidate here is the 100+ of the older 155K83-97 which is a Finnish-built rather conventional L39 gun. In mixed batteries with either a new light gun or those 122H63 that are in best condition, 48 of the heavier guns would give six battalions an eight-gun heavy battery, giving them a serious increase in firepower (mixed battalions probably would require at least the heavy battery to be eight-gun to allow it to be used for independent fire missions).

There’s obviously just a few problems:

  • The issue with finding firing positions for dispersed eight-gun batteries,
  • The added logistical complexity of mixed-calibre battalions,
  • The fact that 48 heavier guns would replace just ten to twenty (very generously calculated) percent of the soon-to-be-retired 122H63-force,
  • The fact that something then would need to replace at least part of the 155K83-97 in their current role to free them for the move to the current light battalions.

The first two have so far stopped mixed battalions from appearing in the Finnish OOB, while the third point goes back to the lack of a one-size-fits-all solution. The fourth is rather complex, and we’ll get back to that one.

Nenonen’s heritage, pt 1: The Mission

The future of Finnish artillery is a topic I’ve touched upon earlier as well, in particular this post from a few years back. Much of what I wrote back then is still valid, but as the topic is complex, and certainly deserving of deeper study than a single post thrown together on a train provides, the time has come to revisit it. The two key sources here will be The Future of Fires, a RUSI report by Jack Watling from last year that looks at the situation from a UK-angle but with several aspects that carry over to the general artillery discussion, and Tykistö taistelee tulellaan, a Finnish book from 2017 on the first century of Finnish artillery tactics written by colonel (ret.) Pasi Kesseli, PhD. As is usual with Finland, there are serious gaps in open sources due to the strict focus on operational security, but Kesseli does cover the development from 1990 and up until the current day in approximately ten pages, which provide some interesting insights into Finnish artillery doctrine and organisation, information that can then be fitted into the more general picture provided by Watling.

Observers Arctic Shield 18 KAIPR Maavoimat FB
A Finnish forward observer team made up of conscripts from Kainuu Brigade during exercise Arctic Shield 2018. Source: Maavoimat FB

The current Finnish doctrine divide fires into tactical and operational levels. The tactical fires aim at directly influencing the flow of battle either immediately or within a very short time span. In practice, this means that the firing ranges are often shorter, and the fire missions include both destruction as well as suppression of targets. The missions are usually handled by the organic artillery and mortar units available at the brigade level or below, though support by for example light rocket launchers (122 mm RM-70, locally know as 122 RAKH 89) can also fill the role if so required. Fire direction is also usually handled by the organic C2, sensors, observers, and reconnaissance assets. See Eyeonscandinavia’s post for a more detailed discussion on the role of the observers.

Operational fires on the other hand deals with the critical systems and nodes of the enemy, meaning that if they can be affected the capabilities of the enemy to carry out successful military operations are suffering. These are often found further back from the frontline, but it is important to note that as opposed to earlier Finnish doctrine which did differentiate between tactical and operational fires based on range, the difference is now based purely on the value of the target. This is roughly in line with Watling’s report, which grapple with the question of fires based on four different mission sets:

  • Breaking up enemy force concentrations,
  • Providing fire support to enable manoeuvre,
  • Suppression of enemy fires (counterbattery fire),
  • Striking high-value targets.

Of these, the first two can be seen as tactical fires according to Finnish doctrine, while the second two are operational level missions.

The high-end indirect fire system in Finnish service is the M270 MLRS, locally designated 298 RSRAKH 06. Source: Maavoimat FB

The Finnish Army is decidedly artillery heavy, featuring a serious amount of organic indirect fires at all levels starting with the battalion. The core unit in the artillery is the 18-gun battalion, consisting of three 6-gun batteries. These are either light (122 mm D-30 howitzer, locally designated 122H63) or heavy ones (using either Soviet-built 152 mm or Finnish 155 mm equipment), with the whole artillery battalion always using the same calibre. The battalion is treated as a single firing unit, though certain fire missions can be handled by either a single or two of the battalion’s batteries. A key detail is that the battalion has a robust enough C2-system that it can control fire from several battalions. This is based on the M18 combat engagement system provided by domestic supplier Bittium, and which is seen as a key enabler in allowing the Army to conduct dispersed operations at a rapid pace, something which the artillery arm is taking advantage of. Already as part of the now obsolete Brigade 2005 structure any artillery battalion could direct fire from not only it’s own guns, but from another two tube or rocket artillery battalions as well. How many firing units can be controlled by a single battalion’s fire direction centre under the current organisation is not open information.

This modularity is obviously not unique to the artillery, but is part of a more general trend in the Finnish Defence Forces to be able to react to changing situations by tailoring the forces under a given command to meet any particular situation, including combining different capabilities and unit levels (local, regional, operational) to produce the desired order of battle to meet requirements. The switch to more robust baseline units to be able to handle missions at lower levels and be able to absorb some losses without losing combat capability is not unique either, but is also mirrored in how infantry units have grown in size.

The towed batteries which make up the vast majority of Finnish indirect firepower rely on dispersion for protection, spreading out the artillery battalion over an area that can be as wide as 15 by 40 kilometers, with individual guns preferably at least 500 meters from each other. In practice, this reduces the battery from a single high-value target to a number of individual targets of lesser value. Another key aspect in improving the survivability of the batteries have been the continuous improvement of the organic entrenchment capabilities of the units, including heavy vehicles to prepare gun positions and close-in defence positions for the riflemen. The latter is also increasingly important as under the most recent doctrine (Maavoimien uudistettu taistelutapa) there is a focus on having the guns placed close to the front and having stored “an abundance of rounds” in these forward fire positions, to be able to cause the enemy a large number of casualties and disruptions from the get go. The obvious downside to dispersed positions and forward locations is the risk of the individual guns being overrun by advancing enemy units, as their location makes them vulnerable and a concentrated defence becomes more difficult.

While many of the concepts presented in Watling’s paper largely correspond to current Finnish artillery doctrine and the general trends identified in Finland, there is a key difference, namely the relatively narrow frame of reference provided in looking at a UK division fighting in a defensive expeditionary war as part of a NATO corps structure. While this is comparable to the question of what kinds of fires Finland might have a need for in the direction(s) that is the focus of operations, the broader Finnish question include what kind of fires are needed in secondary directions as well. The modularity is also more critical from a Finnish point of view, to be able to quickly create a concentration of fires in a certain area. Here it should also be noted that the Finnish force structure above the brigade level is not public information, and hence it would be incorrect/uncertain to talk about division or corps assets within a Finnish framework. However, the Finnish system does sport a number of high-end systems which are described as not being part of the brigade structure, and the role of these higher-level assets correspond to those associated with the British division and corps assets (including both providing additional tactical firepower when the need arises as well as providing operational fires). The most probable Finnish organisation is that these higher level assets are found in independent battalions, which are then attached to higher level formations as appropriate.

1280px-1_yorkshire_regiment_281_york29_battlegroup_conducting_live_firing_during_exercise_prairie_lightning._mod_45158826
An AS90 from the King’s Royal Hussars during an exercise in Canada. Note the shorter barrel compared to more modern systems such as PzH 2000 or the K9. Source: Sgt Mark Webster RLC/UK MOD

The current British top-of-the-line tube artillery is the two regiments of AS90 self-propelled 155 mm howitzers. As opposed to many newer systems such as the K9 and the PzH 2000, the AS-90 is equipped with a shorter L39 barrel. A British artillery regiment is in fact corresponding to battalions in other countries, although the British Army uses an eight-gun battery structure, giving the regiment 24 guns. This is something that the Finnish Army also has studied in detail, and the idea was given serious thought in the late 90’s as it would have made it possible to keep performing fire missions while constantly having one of the battalion’s three batteries on the move. In the end, it was opted against this setup, amongst other things due to the difficulty in finding suitable firing positions for a dispersed eight gun battery.

Watling envisions a very similar kind of tactic for the British regiments, although he calculates with firing ranges for 52-calibre howitzers and not for the current AS90:

Across the 24-gun group, with two guns firing on each fire mission, and the firing pair handing over at two-minute intervals, the group could prosecute four separate fire missions delivering eight rounds per minute to each, and sustaining this rate of fire – assuming a magazine capacity of 40 rounds per gun – for 30 minutes. If the battery is reduced to three sustained fire missions then six guns can replenish their magazines so that the rate of fire can be sustained as long as ammunition continues to be moved forward, as per the existing carousel system for resupply. The elegance of this system is that for an enemy artillery commander, they would only observe two isolated firing positions at any given time, which would change frequently.

[…]

If such a regiment were deployed 12km behind the contested zone, its rearmost gun would be able to deliver effects 24km into the contested zone, while the regiment could deliver MRSI 16km into the contested zone, thereby remaining able to deliver – given a six-round salvo per gun – between 144 simultaneously impacting and 3 salvos of 48 155-mm shells to any point within the operating area of an opposing MRB.

Watling’s conclusions are that no high-readiness brigade can operate on the modern battlefield with less than 24 155 mm self-propelled guns, as these are the bare minimum for the tactical fire missions that can be expected when operating within a NATO structure where additional divisional and corps fires can be expected to handle the counterbattery role and other operational level missions. For a whole divisional support group that also would handle some of these operational tasks, the need would be a minimum of 72 guns, as well as a regiment (battalion) of heavy rocket launchers. For these to be able to go toe to toe and match the Russian capabilities, different kinds of modern area effect and sensor-fused (sub-)munitions are required to achieve a higher effect than traditional unitary warheads. The latter notion isn’t uncontroversial, as it partly runs counter to the Oslo Convention on Cluster Munitions (CCM), of which the UK is a signatory (as opposed to Finland, Russia, and the USA). However, it is notable that if encountering a corresponding Russian unit, a British division of today would be outgunned both in numbers as well as firing ammunition that produces a less lethal effect compared to their Russian counterparts.

Giatsint
The 2A36 Giatsint-B (152 K 89) is the last Russian heavy gun left in Finnish service following the recent withdrawals of the 130 K 54. Source: Kainuu Brigade FB

However, with 72 heavy guns providing operational fire missions, Watling feel that 155 mm is overkill for the tactical supporting fires. Currently the light fires in UK units comes from the ubiquitous 105 mm L118 light gun, which is towed. As Watling argues for all guns to be self-propelled, and as the battalion support gun in British service will need to be airmobile (i.e. below the eight-tonne lift capacity of a Chinook), he notes that the most viable solution would likely be that battalion-level fires would be provided by a 120 mm mortar on a light vehicle such as the Supacat. The firepower of this solution is not completely unlike the Swedish solution to provide battalion fires with a twin-barrelled 120 mm mortar mounted on a CV90 chassis, though the reasoning behind is rather different (Sweden having arrived at the solution by focusing tactical mobility as part of the mechanised battlegroup rather than higher level mobility). As there is no Finnish requirement for airmobility for the battalion fires, especially not for the local forces, this line of reasoning has less relevance for the Finnish situation. However, if we for a moment stays with the UK divisional example, Watling end up with the following total:

• One battery of anti-tank guided weapons per battlegroup.
• One battery of 120-mm mortars per battlegroup.
• 72 155-mm 52-calibre howitzers with anti-armour area-effect munitions or DPICM.
• A regiment of MLRS with a compliment of sensor-fused sub-munition dispensing
rockets, and LRPF.

These are then supported by corps-level assets, but contrary to many NATO-centred analyses Watling actually does not expect much in the way of support from the air during the early stages of the conflict, a starting assumption that does mirror the Finnish situation.

As noted, it isn’t possible to make an apples-to-apples comparison for a Finnish order of battle as the Finnish wartime OOB is a) secret, and b) less formal in nature than a British expeditionary force would be. However, it is notable that during the first decennium of the millennium (newer numbers are secret) the standard according to Finnish doctrine was that an attacking brigade would be supported by an additional 72 to 108 guns or rocket-launchers from higher assets in addition to the brigade’s organic 18 gun battery, numbers that come very close to the divisional support group argued by Watling. 72 is by the way an interesting number in that it is a multiple of both 18 and 24. We’ll be back to multiples of 24 in a week or two, as one has appeared in an unexpected place.

Reach out and touch someone – at 40 km

While the Finnish Navy is undergoing a visible transformation with the acquisition of the Pohjanmaa-class corvettes and the Hamina-class MLU, away from the headlines an era is about to end. The Finnish Defence Forces had the luck of inheriting the unfinished but still impressive Peter the Great’s Naval Fortress when the country became independent in 1917, making it a major player in fixed coastal artillery. But now the end is approaching for the 130 TK, the last fixed guns of the country.

The glorious life of a gun crew on the 130 TK. Source: Merivoimat FB

The 130 TK is the mid-sized coastal defence system in Finnish service, wedged between the MTO 85M (RBS 15, to be replaced by PTO 2020) and the RO 2006 (Spike ER). Being the sole artillery system, it has a few unique features compared to the missiles.

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Artillery observers directing fire from the 130 TK during exercise Silja earlier this year. Source: Merivoimat FB

The most important difference is cost of the rounds. Modern artillery rounds aren’t necessarily cheap, but they’re certainly cheaper than missiles. They also provide the ability to target vessels where a PTO 2020 might be overkill (such as minehunters, landing craft, and small auxiliaries), and to maintain suppressive fire over prolonged time (both against vessels and against units that have come ashore). A key feature is also the ability to fire a warning shot, something that might come in handy in a ‘hybrid’ scenario where you don’t necessarily want to put a missile in a suspicious vessel. However, the Navy has let go off their towed systems, meaning that replacing the 130 TK with mobile artillery would require reintroducing the artillery branch in the Navy (or asking really nicely if the Army would have a few wartime batteries to spare). The Navy’s standing comment is that they are still looking at all alternatives, including both missiles and artillery.

But where better to ask about what those alternatives can be than at AMBLE Baltic?

The new Nammo 155 mm extended range family. Already in Finnish service, might it be the kind of versatile low-cost solution that the FDF loves? Picture courtesy of Nammo (all rights reserved/media license)

First stop is Nammo’s booth. The Norwegian/Finnish company is a well known supplier of artillery to Finnish heavy guns, and the company representative is happy to discuss the potential of using 155 mm rounds for coastal defence. While the mission isn’t part of the current mission set, “there’s lots of possibilities”. This includes not only extended range HE-rounds which push 40 km with base bleed from a L/52 gun, but also rocket-assisted projectiles with 70+ km range from L/52 guns as well as different kinds of precision guidance kits. Against a target such as a vessel 7 kg of explosives from a RAP round might well be plenty enough to achieve at least a mission kill. Fire direction against a moving target will present some challenges, but Nammo is certainly interested in having a go at it. Or as the company representative sum it up:

It’s worth having a look at.

But if Nammo isn’t in the coastal artillery game at the moment, two tables away is someone who is. Eurospike GmbH supply the Finnish Navy with the Spike ER (RO 2006) for the coastal defence role, as well as the Finnish Army with the Spike MR and LR for the anti-tank role (as the PSTOHJ 2000 and 2000M respectively). The oldest batches of the RO 2006 are approaching the end of their shelf-life, which brings a further twist to the 130 TK replacement. The RO 2006 has a range of 8 km, and the logical follow-up is currently in qualification.

RO 2006 being fired during exercise Silja. Source: Merivoimat FB

Spike ER2 adds another two kilometers of range and non-line of sight ability compared to the current ER. The seeker head is also able to use both the IR and the daylight mode simultaneously, making it harder to spoof the tracking. The anti-tank warhead is also promising 30% higher penetration, something that is largely of academic interest for the anti-ship role. While not directly discussing the coastal defence role, the company representative confirm that they are in discussions with the Finnish Defence Forces regarding new anti-tank concepts for all ranges. The Spike does have a trump card, as it makes it “possible to have everything in one family”. A dual-Spike solution for the Navy could potentially be in the cards, with the Spike NLOS allowing for 30 km range currently, and “more in a few years”. There’s also “solutions for even higher ranges”, but the company won’t go into further details as to what those are. Eurospike also notes that the coastal defence role might require a lighter solution than the current vehicle-mounted NLOS platforms, and suggests that UGVs with NLOS might be a suitable concept.

The size difference between the Spike ER2 (left) and the LR2 (right). Source: Own picture

Could Eurospike score a missile grand slam with more and newer anti-tank missiles to the Army and a dual-buy of ER2 and NLOS to the short- and medium-range coastal defence needs of the Navy? Possibly, but the introduction of NLOS would require quite a bit of new infrastructure in the form of suitable transport vessels to get the missiles moving in the archipelago, somewhat leveling the playing field compared to the investment an artillery-based solution would require. Perhaps adding a few batteries to the buy of whatever replaces the outgoing east-built guns will still turn out as the prefered solution?

Guest Post: An Unreasonable Brigade Artillery

A few weeks ago a blog post discussing Swedish artillery at the brigade level caught my eye. As I noted last year,Finland is looking at the retirement of a significant portion of our brigade level assets in the near future, and which system should replace these is far from obvious. The post by Öhman was also of the kind of outside the box thinking I like to bring forward, so I contacted him and asked for permission to run an English translation. The translation is my own, and all faults when it comes to jargon are my own work as well.

The author Peter Öhman is a Swedish officer with a solid knowledge of anything armour or artillery who currently works at the Swedish Defence Material Administration. You will find him on Twitter and on his blog.

In a future growing Army there are many who feel that Haubits 08 ‘Archer’ would be optimally used as a divisional asset. It is a sensible idea which has been discussed in many places, but which won’t be developed further here.

With Haubits 08 as a divisional asset there would appear a void on the brigade level, as we don’t have any towed Haubits 77 mothballed. What should then be the remedy?

If one looks at the different requirements for a brigade-level artillery system they could look something like this:

  • Instantaneous firepower that allows a unit of size X to fire a fire mission in under 10 seconds,
  • Accuracy that allows the fire mission to hit the target location,
  • The ability to maintain sustained fire for X amount of time,
  • Protection which allows the artillery unit to operate together with the rest of the brigade,
  • Mobility which allows the artillery unit to move with the brigade’s battle,
  • High availability.

In practice this means that the artillery piece must have a certain rate of fire, especially initially. The ability to sustain fire over time is created by bringing lots of ammunition, having the ability to reload rapidly, having an efficient logistics chain, and sporting a high resistance to the barrel heating.

Protection means protection against shrapnel, but also signature reduction and the ability to rapidly move to a new position after firing. When discussing mobility it is easy to get dragged into a discussion about tracks or wheels, which is a balance between the ability to quickly transfer between battalions and cross-country mobility to reach suitable firing positions in the terrain. Very few today consider using towed pieces, due to the longer time to get them into position.

High availability may be technical reliability, but it may also be based on mobility, and perhaps most of all range.

As the requirements are broken down into details, sooner or later the question about what calibre should be used will become the topic of the day.

Of what calibre should a future system be?

155 mm is of course the NATO-standard and a calibre which has been working well since at least the Second World War. We can’t abandon a NATO-standard by ourselves, and we have old ammunition stocks which we need to be able to use. That’s how easy the analysis can be. Now is when I will be unreasonable and question this train of thought. Is 155 mm really an obvious choice for supporting the fighting formations of a brigade? The following text should be treated as something of a “military satire”.

If we look at the specifications for a number of common artillery systems in 152 and 155 mm we get the following table:

SystemWeight (t)Range (km)Am. carriedShots/minLengthCrew
2S194224.7506-8L/475
K-94730526-8L/525
M109A73524394L/394
PzH 200056306010L/525
Haub 0833.530218-9L/522-4

Ranges given are for standard rounds, i.e. not including base bleed or similar technologies.

When looking at even large calibers such as 203 mm the big benefit of 155 mm is that it is easier to handle both for humans and machines. A 155 mm shell weighs around 45 kg, compared to at least twice as much for a 203 mm one. The recoil forces are also about twice as big, leading to an unreasonably large gun. The range will also be short unless one want a barrel that is 2.5 m longer than the already long 155 mm L/52 barrels. Big and heavy ammunition also leads to a low rate of fire. The US M110 howitzer with an L/25 barrel has a range of 17 km with standard ammunition. Weighing 28 tons it only carry two rounds. This means a continuous supply of ammunition is required, and even in the best case scenario the rate of fire is around 1 shot/min.

Ukrainian 2S7 Pion in 2017. Source: Ukrainian MoD via Wikimedia Commons

The Russian 2S7 is bigger and weighs a staggering 46.5 ton, have a L/56.2 barrel which gives a V0 of 960 m/s and gives the 110 kg shell an impressive 37.5 km range. However, it only carries 8 rounds and can at best handle a rate of fire of 2.5 shots/min. 2S7 is 13 meters long and has a crew of seven.

These kinds of calibres are unreasonable for highly-mobile artillery that supports the combat units of a brigade, and are better suited to hammering fortifications.

A Finnish 2S1 Gvozdika / 122 PsH 74 during exercise Pohjoinen 18. Source: Maavoimat FB

Eastern countries also employ 122 mm. The most common vehicle is the 2S1 (122 PsH 74 in Finnish service) which fire a 21.7 kg shell out to 15.3 km from a L/36 barrel, it weighs 16 ton, has a crew of four, and carries 40 rounds.

2S34 Khosta on parade. Note the new weapon. Source: Vitaly Kuzmin via Wikimedia Commons

A modernised version of the 2S1 is known as the 2S34 Khosta which sports a 120 mm gun/mortar with a range of 14 km. The same gun is found in the 2S31 Vena which carries 70 rounds and weighs 19.5 tons.

Swedish 12/80 coastal artillery gun. Source: Marinmuseum via Wikimedia Commons

In Sweden we had the 12/80, a 120 mm version of Haubits 77. With a L/55 barrel it had the same range with load 2 that the L/38 Haubits 77 had as its maximum range.

Calibre 105 mm is something that usually has been found on the battalion level. An example of a modern system is Hawkeye which is based on the HMMWV. The weight is just 4.4 ton. With a L/27 barrel is has a range of 11.5 km with a 15 kg shell. According to one source 8 rounds are carried.

105/50 coastal defence gun of the Arholma Battery. Source: Patrik Nylin via Wikimedia Commons

There are also long-ranged 105 mm systems. The Swedish turreted automatic 105/50 with L/54 barrel had a range of 20 km. It is especially interesting that a number of other countries still cling to and develop 120 mm-class guns. I will therefore make a comparison between 120 and 155 mm weapons when it comes to a few specifications I regard as critical for brigade artillery.

Range, less is more!

Upon a quick comparison 155 mm seems to have the edge when it comes to range. 15.3 km from a L/36 barrel compared to 24 km from an L/39 when comparing 2S1 and M109. However, 2S1 uses a rather modest 3.8 kg powder charge to reach a V0 of 680 m/s and 15.3 km. At the other end of the spectrum, Swedish 120 mm Tornautomatpjäs 9101 (12/70) uses a L/62 barrel to reach 27 km with a V0 of 880 m/s. The earlier mentioned 120 mm 9501 (12/80 Karin) can reach 21.1 km with charge no 2 with a V0 of 800 m/s. 155 mm guns with a 800 m/s V0 can reach around 22 km, meaning that the difference is rather small. 120 mm as a calibre has good ballistic properties. With a barrel length of around L/50 a 120 mm gun will use 5-6 kg and a 155 mm one 12-15 kg of powder to reach a V0 of 800 m/s. A 120 mm L/62 is also 60 cm shorter than a 155 mm L/52. In other words a rather small potential edge in range for the 155 mm is balanced against having a long barrel that’s still easily handled for the 120 mm.

Another aspect of the range question plays a major role in the discussion, and this is where less is more. The fact is that when the range approaches or pushes beyond 20 km, the shells will follow a trajectory that is so high, and spend such a long time airborne that the weather makes accuracy unacceptably poor. The reason is partly because it becomes hard to reach the desired effect without ranging shots and/or the need for additional rounds in target, and partly because the increased dispersion increases the danger for the friendly units one tries to support. Base bleed and rocket assisted projectiles (RAP) which are used to increase the ranges also further diminish accuracy and increase cost. To counter this increase in dispersion once the range is edging towards 40 km technical aids such as precision-guided rounds and course correcting fuzes are used. These are very expensive, and ill-suited to the massed fires required to support ground combat. Firing at ranges between 30 and 40 km also has other consequences. At least double the gas pressure and V0 close to 1,000 m/s leads to increased strain on the equipment and faster wear. My opinion is that if the laws of physics makes it a bad, or at the very least an expensive, idea to use supporting fires at ranges above 20 km, then we shouldn’t invest too much money and effort into such a capability for systems acquired to support ground combat. To reach 20+ km 120 mm is plenty enough.

Effect

Presume a fire mission of 24 155 mm rounds would be replaced by a single round with the same weight of just over 1,000 kg in the middle of the target area. It is obvious that the effect would be poor in the majority of the target area and unnecessary good close to the giant round. Ordinarily one strives to spread the effect evenly over the whole target area. Case in point being the use of submunitions. Before the Convention on Cluster Munitions there was even a project on introducing 120 mm mortar rounds with submunitions, and in Russia who doesn’t give a damn about the ban on submunitions their use is increasing. Against fortified targets heavier rounds do however maintain the edge.

The 122 mm D-30 howitzer remains the mainstay of Finnish battalion indirect fire assets. Source: Maavoimat FB

In a comparison between a big bang and thousands of submunitions one can compare the weights of 24 rounds of 155 mm, 45 rounds of 120 mm, and 72 rounds of 105 mm. The superior effect would in this case come from 72 rounds of 105 mm. A good indication is that a Swedish fire mission of 24 120 mm mortar rounds is treated as the equal to 18 155 mm rounds. The weight of a mortar round is in fact more closely equal to that of a 105 mm howitzer round. The effect of a single 120 mm howitzer round matches very closely that of a 155 mm one. The issue is that one reaches further with a heavy round, but preferably would split it up in many smaller units when reaching the target area to get superior effect. As long as we uphold a ban on submunitions the importance of choosing a calibre that gives good effect in the target increases. Scientific advances also make it possible to fit a seeker in smaller rounds than before, though it would be difficult to get as good effect e.g. out of a 120 mm BONUS-round as out of a 155 mm one.

Logistics

To compare the logistics footprint I make the assumption that 24 155 mm rounds equals 30 120 mm rounds when it comes to effect. A complete 155 mm round has a weight of around 60 kg, made up of a 45 kg shell and a 15 kg charge. Similarly, a complete 120 mm round weighs around 32 kg, of which 25 kg is the shell and 7 kg the charge. The fire mission of the 120 mm gun would then come in at two-thirds the total weight of the 155 mm fire mission. If you include a casing to allow for the automatic handling of the ammunition a complete 120 mm round comes in at approximately 40 kg, meaning the fire mission is just 83% of the weight of the 155 mm one. However, fixed ammunition require more space, and the 120 mm fire mission with fixed ammunition will take up approximately 20% more space. However, comparing against fixed 155 mm ammunition the latter will weigh 70% more and take up 40% more space. The benefit of fixed ammunition is that in the same way as with Bkan and 120/80 it is possible to have a higher degree of automation when firing and handling the rounds. This in turn leads to a higher rate of fire and better effect in target. The conclusion is that with fixed 120 mm ammunition you get a similar logistic footprint, but with a round that is more easy to handle and you will be able to get off more rounds which will give as good or better effect in target compared to 155 mm. In real terms, a full charge 120 mm round with a fixed casing will weigh less than 40 kg, and can easily be carried from vehicle to vehicle by a single soldier. A 155 mm round with a fixed casing will come in at 85 kg and will need two persons to carry it, not the least due to the uneven weight distribution. If an autoloader could use the kind of combustible casings that tank rounds use, it should be possible to shave a few additional kilograms of the 120 mm round.

Bkan 1 with the original loader. Note the size of the 155 mm fixed ammunition in the loading frame.

Autoloading versus manual

To achieve good effect in target a high rate of fire is a good tool, and to reach a high rate of fire the ammunition and its handling plays a big role. 155 mm howitzers usually have a rate of fire that varies between 3 to 10 rounds per minute with separate loading ammunition. These are usually either completely manual or equipped with different kinds of automatic handling and loading aids. Some have the ability to fire off a few quick rounds, before settling in for a lower sustained rate of fire. E.g. Haubits 77A was able to fire three shots in less than ten seconds. This is possible as the charges are put in a casing, which allows for the use of a very quick vertically sliding breech block. The shell and the casing is then loaded with a hydraulic rammer. To fire really quickly fixed casings are needed. E.g. Bkan 1 has a technical rate of fire of 18 rounds/min. The 12/80 is another example albeit with 120 mm calibre. With an autoloader the 12/80 fires off 16 rounds/min. There are even faster Swedish guns. 120 mm anti-aircraft gun 4501 has a rate of fire of no less than 80 rounds/min. The 23 ton heavy gun carries 52 rounds.

12 cm Lvakan 4051

Another Swedish rapid-firing gun, although in 105 mm, is the Strv 103. As far as I remember, the technical rate of fire is 26-27 rounds/min and the tank carries 50 rounds. To note is that the sole 155 mm field artillery piece amongst these was the Bkan 1. The reason behind this is, amongst other things, that the mechanism becomes large and heavy. It is also unable to bring along more than 14 rounds. This is likely one of the reasons why modern 155 mm guns almost universally have separate loading munitions. The second, and perhaps even more important issue, is that one wants to be able to set the charge size for each round, and not be limited to a pre-set number of each charge that is set already when the ammunition is manufactured. In 120 mm it should however be possible to benefit from the carefree handling of fixed ammunition and bring more rounds, without the rounds becoming overly large.

Autoloaders is however not an end in itself, except when it comes to the firing. As mentioned earlier, 120 mm is considerably easier to move by hand. This includes fixed case 120 mm ammunition, which thanks to its below 40 kg weight can be moved in the same way ammunition was replenished in Strv 103.

Will there be something else than 155 mm if we buy a new system?

I have a hard time believing that, 155 mm is in all essence even more standard than 7.62 mm. That is why I describe this as an unreasonable brigade artillery. If one would start from a clean sheet, it is however entirely possible that with the technological advances of today the conclusion would be that another calibre would be better suited for supporting the brigades. Perhaps based on some of the reasoning found above.

But we just have to accept that we do not begin with a blank sheet, instead there are several limiting factors that affect the outcome. At the same time, evident truths need to be questioned every now and then. E.g. the miniaturisation of electronics allow for ever smaller rounds to become “smart”. If the reasoning behind 155 mm was the need for precision guided munitions the choice of calibre could be reevaluated now. However, over time factors such as standardisation have become important and will lead to the continued use of 155 mm.

Are we in the West looking for the right capabilities?

As a short sidetrack to the discussion on calibre choice I would like to touch upon two topics that I believe are receiving too much attention: the race for range and extreme precision.

With each new gun there are new solutions to push the range out even further, from L/39 barrels to L/52 as the new standard, and now barrels out to L/58 are discussed even for guns such as the M777.

M777A2 and M777ER with L/52 and L/58 barrels respectively. Source: US Army

Base bleed, RAP, and ramjet projectiles are other ways of reaching further. It is easy to see the benefit of reaching longer, and easy to quantify range as a requirement or selling point, which is why it is often in the spotlight. But range threatens to become the “24 cm higher cabin” of the artillery, an extreme cost driver. Longer range also places indirect requirements on extreme accuracy, no longer is just “rather accurate” good enough. The technology behind the increased accuracy is and will continue to be expensive. This means that the ammunition used to fire far away and with high accuracy becomes too expensive to use for massed fires. The most extreme example is the 155 mm guns of the Zumwalt-class which were supposed to receive rounds capable of reaching 153 km. The price tag became close to 1,000,000 USD/round as opposed to the planned 35,000 USD. The contract was revoked and the destroyers now lack a suitable round for their guns.

There need to be an analysis regarding the missions of individual systems. For a multitool, which is the role one can say that the Haubits 08 has been forced into, long range is a must. If it is a battalion-level asset, the conclusion might be that the 8 km range of a mortar is enough. If the mission is to support the fighting battalions of a brigade, the requirements need to be in sync with those demands, and not necessarily with those of the multitool. Was the reasoning behind the 150 km range of the Zumwalt’s 155 mm guns really correct? Should one have opted for another system if 150 km range was demanded?

The quest for accuracy partly comes from the increased range, but also from some kind of engineering bewitchment for perfection. Accuracy is very nice when the enemy headquarters is located or when the enemy has put their fighting positions close to a hospital. But at the end of the day, artillery is an area effect weapon, and to achieve effect it is enough to hit the target area instead of aiming for the bullseye with every round. I am worried that we in the West is forgetting this. I don’t know how many times I’ve heard “Isn’t it jolly good to have better accuracy, that we can get the same effect with fewer rounds.” I have tried to explain that it is enough to be in the right area and that it is more important to be able to fire large volumes in many places, which increases the odds that the enemy will be suppressed in many different spots. Often the fire mission is based on an estimate on the enemy and the terrain, and not on an observation. If one can see the enemy both we and the enemy can use direct fire, and it is the losses that causes which we wish to avoid. Why then aim for a few expensive bullseyes and completely overlook massed fires? Making this case is often like talking to the wall. I will however persist, gutta cavat lapidem.

The Long and the Short of Finnish Guns

The Finnish Army learned to love artillery during the Second World War. There never seemed to be enough of it to cover all needs, and the Red Army always seemed to have plenty enough. At the same time, air support was even scarcer, meaning that if you wanted to produce any kind of effect on the other side of the hill, you either had to send in someone on foot or bring the artillery to bear. Like conscription, massed artillery was one of those ideas the Finnish Defence Forces clinged to even when it seemed obsolete to most western observers.

Artillery is also wonderful in that working artillery pieces have an extremely long lifespan. Sure there are developments, but getting hit by 130 mm shrapnel hurts as much today as it did in Golan 1973. Still, everything comes to an end, and unfortunately for the Finnish Army quite a lot of things are coming to an end at roughly the same time.

The Heavy-hitters

For much of the Cold War the stalwart of the Finnish Defence Forces was made up of Soviet artillery systems, with a number of wartime British and German pieces thrown in for good measure. After the German reunification Finland also bought large number of 152 mm field guns and howitzers from ex-DDR stocks. However, dwindling and aging ammunition stocks have meant that all howitzers are withdrawn, with two battalions of 152 mm 2A36 guns and six battalions of 130 mm M-46 being left in service (note that the figures of wartime strengths should be taken with a grain of salt, as the Finnish Army rarely acknowledges the number of individual systems. These figures are the ones found in a trusted open source for 2018).

130 K 54, as the 130 mm M-46 field gun is known locally, during live firings in Northern Finland 2015. Source: Maavoimat FB

Both of these are expected to be phased out within the next few years, effectively reducing the number of Finnish towed heavy artillery by 45%. Left in service will be the 155 K 83-97 and 155 K 98, two domestic field guns firing NATO-standard 155 mm rounds. The K 83-97 is an 80’s design featuring an L/39 barrel, while the K 98 is a more modern piece with a L/52 barrel and an APU, a small engine allowing the gun to drive short distances under own power and thereby significantly aiding in the handling of the gun.

Amongst the self-propelled pieces 48 modern K9 Thunder 155 mm SPGs are being introduced. These highly efficient weapons will replace the already retired 2S5 Giatsint-S 152 mm SPGs and the still serving 2S1 Gvozdika 122 mm SPHs. However, the number is low enough that non-mechanised units are unlikely to see any self-propelled artillery. As such there is a gap evident amongst the mid-tier (regional) units of the wartime Finnish Army, where the retirement of the Soviet guns will be felt most keenly at the brigade level and above.

155 K 98 during the celebrations marking the 100 year anniversary of the return of the Jaegers, held in Vaasa in February 2018. Source: E. Häggblom

The obvious solution is to buy more guns. However, this is not necessarily as simple as it sounds, as heavy towed guns have rapidly fallen out of fashion. The few guns found in production, such as the US M777 and the Pegasus of Singapore, are often tailored toward expeditionary roles requiring them being airmobile. This leads to extremely low weight, but while lightweight guns generally are more fun and easy for the crews to operate, manufacturing gun parts from titanium comes at a price. A hefty price. The Australian DCSA request from 2008 comes in at 4.35 million USD a piece for 57 howitzers of the newest M777A2 version, though that included a SINCGARS radio for each set as well. The following year BAE bagged an order for 63 more M777A2 for USMC and Canada at a unit cost of a more decent 1.9 million USD. Still, that’s a far cry from the 500,000 Euro that the Finnish Defence Forces paid for its 155 K 98 ten years earlier.

The big factor as noted is the weight. The K 98 comes in at 14.6 tonnes, over 10 tonnes more than the 4.2 tonnes of the M777. However, the comparison isn’t a direct one, as the K 98 is a hybrid gun-howitzer while the M777 is a ‘pure’ howitzer sporting the somewhat shorter L/39 barrel length. However, thanks to developments in ammunition the M777 can also push out its rounds to the coveted 40 km range, making the difference in performance smaller (at least on paper, you won’t see accuracy figures of the two systems in open sources anytime soon).

At close to two millions a piece and requiring a towing vehicle (in theory the M777 can be towed by a HMMWV though in practice this is often handled by a 6×6 truck), a single gun system with gun and tower likely comes in at close to 2.5 million euros. And at that price-point something else appears. 

Enter the Nexter Camion équipé d’un système d’artillerie, or CAESAR 8X8 for short, a 155 mm L/52 gun on a Tatra chassis. The 16 systems bought by the launch customer Denmark, including initial spares and a 10 year service agreement, comes in below 2.7 million euros a piece. While critics have decried the baseline CAESAR 6×6 as not offering any protection for the gun crew I feel the comparison is unfair. After all, at the price point the system is found the real competition is not the K9 or PzH 2000, but rather towed systems. And being mounted on an all-terrain truck it offers superior mobility without the need for a dedicated towing vehicle, while the lack of crew protection is the same. Replacing the Soviet designs with more 155 mm systems would simplify logistics, as all heavy systems would employ the same 155 mm NATO standard munitions. As such the question is raised if we shouldn’t just place an order for 100 CAESARs to replace the retired guns starting in 2020?

The original French CAESAR 6×6 during a live firing exercise in Afghanistan in 2009. Source: Teddy Wade, U.S. Army via Wikimedia Commons

Well, the first issue is money. Even considering economics of scale the order would like come in at 200 million Euros, money which is hard though not necessarily impossible to come by. The other question is – perhaps somewhat unexpectedly – whether a self-propelled system is objectively “better” than a towed one? Not necessarily, especially not in the tight confines of Finnish terrain (i.e. forests). Handling the gun when you can’t get rid of the truck quickly can be more difficult, while the difference in height is evident from the pictures above. Protection of the system (as opposed to the crew) does become something of an issue. While the better part of a towed weapon can be hidden by a berm the height of a standing person, the truck needs, well, a truck-height of cover. These obstacles aren’t impossible to overcome, but for a traditional role towed systems might actually offer some benefits.

But what about avoiding counter-battery fire, I hear you say? Well, up until now the answer has been that when the guns in an individual battery are spread out so that there’s 400 to 800 metres between each gun counter-battery fire becomes ‘difficult enough’, with no need for shoot-and-scoot tactics. Also, even if there’s no need for a towing vehicle, the amount of rounds carried by a CAESAR is limited, and there would quickly appear a need for a ammunition truck. Towing trucks are also nice in that they are versatile, and you can replace lost towing trucks from general stocks (or use trucks who lost their guns as general cargo carriers) as the need arises.

Everything in the reasoning above is obviously also relevant for other wheeled SPGs of the same class, such as the Israeli ATMOS. 

The suggested marriage of a 155 K 98 to a Sisu 8×8 chassis. Source: Patria briefing to the Parliamentary Defence Committee 

Could a new domestic gun come into the picture? Possibly, Patria has been pushing for a ‘Finnish CAESAR‘ as a way of maintaining artillery know-how in-country. However, while it is certainly true that the proud Finnish tradition of manufacturing high-end artillery is threatened, the question is if it is too late already? The last newly developed weapon was twenty years ago, and even if one wanted to avoid developing something new and instead simply restarted the 155 K 98-line it is seldom a simple and straightforward process to restart production lines which have laid dormant for 15+ years. At least if we want a competitive price, going abroad might be the only option, at which point license production can then be discussed to maintain domestic know-how.

So are there no options left that would offer Finland 100 guns for less than 200 millions? 

Well, Nexter has noticed that there is a gap in the market, not the least because the Indian Army has a requirement for 1,400 towed 155 mm L/52 guns. To answer this they have launched the Trajan, based heavily on the gun used by the CAESAR. Little information is available, but the gun pushes the range out even further with 52 km range being given for specialised shells, it has an APU, and the weight comes in at 13.0 tonnes. Not a lightweight by any standard, but no worse than the 155 K 98. The rough price for the Indian order would be 714,000 Euros per gun. The main issue is that the Trajan is still just a prototype, and the Indian connection unfortunately makes it somewhat suspicious. It is unclear whether non-Indian exports would be ‘pure’ Nexter systems.

In the same competition Elbit is also offering a corresponding system, called ATHOS. Few hard details are known about the system, which is closely related to the wheeled SPG ATMOS that beat CAESAR in the original Danish competition (more than one commentator has questioned whether the rerun which lead to the CAESAR being ordered was based on facts or politics). The weapon does feature an automatic laying capability and an automated ammunition handling system (i.e. a hydraulic crane/lift). From a Finnish viewpoint, there’s the added twist of the Tampella-ancestry.

The D-30

But the headaches of the Finnish Defence Forces doesn’t end there. There are quite literally hundreds of 122 mm D-30 light howitzers that are still filling the role as battalion level assets throughout most Army units. They will stay on longer than the heavier Soviet stuff, but they are also heading out as 2030 approaches.

But if the market for 155 mm howitzers is small, the market for light howitzers is next to non-existent. Certain light guns and mountain howitzers are still found, but the answer to what should replace the 122 mm howitzer is not necessarily another light howitzer.

The flatter trajectory of the howitzers and guns compared to mortars makes it easier to hide the firing positions at the edge of forests. Here the venerable 122 mm D-30 in action. Source: Maavoimat FB

The D-30 provides basic indirect fire with high-explosive shells, smoke, and illumination. They also provide an anti-tank capability, though it is questionable to what extent an 122 mm howitzer shell, even an armour-piercing one, actually can damage anything heavier than an APC. At the same time the introduction of hard-kill systems on tanks means that indirect and direct fire artillery is becoming more interesting again in the AT-role.

The obvious answer is getting more 120 mm heavy mortars. Lots of mortars. The range is not quite the same as the D-30, but on the other hand the lower muzzle velocity allows for thinner walls in the round, which leads to a 120 mm round packing almost the same explosive power as some 155 mm rounds. And while direct fire isn’t possible, the AT-role can be handled with Pansarsprängvinggranat m/94, or STRIX as everyone except the Swedish calls Saab’s endphase-guided anti-tank mortar round. Mortars, due to their steeper trajectory, require more open space to fire to make sure they don’t hit any trees overhead, but are also lighter and more easily moved compared to howitzers. As such they just might provide the answer to the loss of light howitzers, even if that would be a step back capability-wise in some aspects.

The Headache

Artillery remains a priority amongst the Finnish Defence Forces, but there are some serious gaps coming up within the next decade. Besides the Soviet guns and howitzers on their way out, the RM-70 light rocket launchers are also about to be retired. In addition, modern rounds aren’t cheap, with guided once such as the Excalibur costing tens of thousands a piece (60,480 Euro a piece for the Excalibur to be exact). To be able to maintain a modern and large artillery arm, the Finnish Defence Forces will have to invest considerable sums during the 2020’s.

After the strategic acquisitions for the Navy and Air Force, I will argue that the Army should initiate a study for the best complete package of indirect fires to replace outgoing systems, followed by a strategic acquisition program along the lines of HX and Squadron 2020 to try and secure extra-budgetary funds to implement the program. This certainly won’t come easy, but even 1/20th-part of what HX is getting could prove to be the difference between massed enemy casualties and a repeat of the Winter War situation if we would face a war in 2030. As such, this would thoroughly be a strategic acquisition, though with artillery being less sexy than jet fighters, it might require more communication to get through the parliament.

Big thanks to Luke O’Brien who provided useful insights into the world of artillery and patiently answered my questions regarding the general state of modern artillery. All mistakes and groundless speculations are all my own making.

‘The Best Artillery in Europe’

There are several new developments when it comes to heavy indirect fire in the Finnish Army since I last visited the topic, so here’s a brief overview, including some BONUS-content:

K9 Thunder

The planned procurement of the Korean K9 Thunder self-propelled gun is moving forward. Perhaps the greatest talking point so far has been the discrepancies between reports in KoreanKorean and Finnish media. While Finnish media talks about ‘tens of guns’ for a price tag of ‘100 million Euros or slightly above’, the Korean media is more specific, and mentions 48 guns valued at 400 million US Dollars (375 million Euros), including technology transfer. While the number of guns certainly could be correct, the difference in price is rather staggering…

Contrary to my speculating last time around, the K10 resupply vehicle is not set to be included in the deal. However, Estonia has been invited to join in the procurement. The country has declared their intent to equip their mechanised brigade, the 1. Jalaväebrigaad, with self-propelled artillery. Estonia and Finland has bought defence equipment together before, and a joint buy might be a good way to put some additional pressure on the price.

The first K9 Thunder on Finnish soil attended trials at Rovajärvi firing range last year, as part of the Join Fires Exercise (MVH 2016). The preliminary contract is expected to be signed this spring.

Lost & Found

That the Finnish artillery park has been large is no secret. Exactly how large is.

In an interesting turn of events, the latest reform of the Defence Forces suddenly increased the number of Finnish artillery pieces, 120 mm mortars and up, with about 900 pieces.

This statement, widely presented by the press as Finland hiding information from OSCE, deserves some further comments. Yes, it is certainly not in the spirit of the Vienna Agreement, though part of the explanation lies in the known omissions of the document. The document only covers systems in units down to brigade/regiment level, meaning that those artillery systems deployed in independent battalions and companies, such as the Finnish local defence units, aren’t included. The same goes for the Navy/Marines, which also is outside of the agreement. A third potential issue is stored guns which are again assigned a wartime task, and as such are re-entering the document.

The more interesting part than speculating how it was done is why, and especially why the guns were brought back into the document. There are clearly some high-level signalling taking place.

For those keeping count, the current artillery park is shown as 698 heavy mortars, 18 AMOS self-propelled mortars, 34 2S1 Gvozdika self-propelled howitzers, 471 light howitzers, 76 130 mm field guns, 156 152/155 mm heavy howitzers/field guns, and 113 MLRS.

The best artillery in Europe

The planned purchase of K9 does not take place in a vacuum, but is one part of the larger plan for upgrading the artillery. The aim, as explained by Inspector of Artillery colonel Pasivirta, is to get the best artillery found in Europe, and with some margin.

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First firing of the 155 mm BONUS Mk II ‘smart’ anti-tank round at MVH 2016. Source: Maavoimat.fi

This includes already made steps, such as the introduction of the BONUS anti-tank round. The round has a range of up to 35 km, and once over the target area two sub-munitions are ejected. These are equipped with sensors, and search for armoured targets. If a suitable target is found, it is destroyed by a shaped-charge punching through the roof of the vehicle, normally the most lightly armoured part. The first firing in Finnish service of this highly potent artillery round took place at the above-mentioned MVH 2016 exercise.

The bigger headline was the announcement that the service is looking into counter-battery radars. These makes it possible to locate the position of firing units, and in some cases even to alert own troops in the enemy’s target area that enemy artillery is heading their way. The acquisition of such as system, Saab’s ARTHUR and ELTA’s ELM-2084 comes to mind, would certainly raise the deadliness of the Finnish artillery, and makes perfect sense.

More puzzling was the tweet issued by the official Finnish MoD Twitter-account. Where the colonel talks about a swift (though not rushed) procurement program with an RFQ coming out this spring, and the system being operational by 2020, the author of the tweet (grumpily?) claims that the ‘Defence Forces have wanted the radars for 30 years, but the acquisition hasn’t even been cleared for an RFI’.

I have now idea what that was about.