On Research Vessels and AIS-tracking

The appearance of Russian research vessel Akademik Nikolaj Strakhov (named for the 19th century philosopher with the same name) just outside of the Swedish island of Gotland last week caused some discussions on social media. In this blog post I will address two topics that caused discussion, controversy, and sometimes, misunderstandings: The vessel itself, and the AIS-system used for tracking its whereabouts.

Akademik Nikolaj Strakhov

To start with the vessel is built in Finland in the mid-80’s as one of four sisterships of the Akademik Boris Petrov-class. It is government owned, and apparently operated in a geological research role. Interestingly enough, the vessel seems to have spent over a year broken down in the Indian Ocean, due to bureaucracy and a lack of funds. It is however now back in business, and homeported in Kaliningrad.

The towing of the vessel following it breaking down outside of the Maldives in 2013

To be clear, the vessel behaves exactly as a geological research vessel would. It reported restricted maneuverability, and slowly coasted along on a general North-South course just outside of Swedish waters. “Restricted maneuverability” is a defined term that refers to a vessel “which from the nature of her work is restricted in her ability to manoeuvre as required by these Rules [COLREG] and is therefore unable to keep out of the way of another vessel”. This can be due to e.g. the vessel conducting dredging, cable-laying, towing, mine-clearing, or launching aircrafts. What it doesn’t include is vessels that have broken down, which instead use the signals associated with “not under command”. However, general research work often do fall under the restricted maneuverability, and e.g. survey work would certainly require the vessel operating at slow speed while unable to deviate from the planned course.

Akademik Strakhov’s sistership Akademik M. A. Lavrentyev being intercepted by Japanese Chikugo class frigate JS Tokachi (DE-218) and the US Navy while operating in the Sea of Japan in 1987. Source: Wikimedia Commons/US Navy/PH2 (NAC) Paul Self

The problem obviously is that the Soviet Union and Russia has a long tradition of using civilian vessels such as trawlers and research vessels for more or less clandestine intelligence gathering. It is telling that the only picture of an Akademik Boris Petrov-class ship on Wikimedia is of Strakhov’s sister Lavrentyev being intercepted by Japanese and US forces. And with the Russians regularly employing all parts of the state apparatus in their full-spectrum conflict approach, it would be naive to believe that this scheme hasn’t continued. Is the Akademik a spy ship? That is impossible to say. FVÖ16, this year’s largest exercise conducted by the Swedish Air Force, saw Gotland having being host to a number of units. Also, the Nynäshman-Ventspils and Stockholm-Fårö-Ventspils subsea cables are found in the area, as well as the brand new Markgrafenheide-Helsinki cable, meaning that even if the vessel would only be conducting bottom mapping, the research would indirectly produce data which would be of some value for the Russian Armed Forces.


The AIS system is best thought of as the maritime equivalent to the frequently discussed transponders carried (or not) by aircraft. For the technical part, it sends packets of data over the normal VHF-band, which usually include the vessel’s name, position, heading/course, speed, and potentially a number of other pieces of information (turn rate, heel, destination, ETA, current mode of operation, …). The system provides a simple and inexpensive way of keeping track of traffic in an area, as well as quickly recognising important features of other ships operating in your area (such as restricted maneuverability). It is also employed in distress transmitters, with AIS-SART transmitters being small self-contained AIS-transmitters  that can either be brought along in a survival craft or, in the worst case, be left floating when a vessel sinks.

However, it is important to be aware of the limitations of AIS.

To begin with, as noted the AIS signal is basically just a pre-programmed and automatic VHF-radio. It has limited range, which can be limited further by bad weather or atmospheric conditions. It is also possibly to turn it off by the flick off a switch, in case you are heading somewhere you don’t want to be seen. There are legitimate scenarios where this is the case, with e.g. merchant ships turning off their transmitters if they fear they are at risk for a pirate attack.

The system has also started to show its age, and while this contributes in making it affordable, it also means that it is designed with openness prioritised over security. As such, it can relatively easily be compromised by hackers, which can feed false data into the system. This can include drawing fake tracks, creating non-existent vessels, or making existing ones disappear. While this caused quite a stir when a publicised case took place a few years back, there has so far not been any major incidents caused by hacking the system. One issue working against any malicious use being successful is that there are a number of happy amateurs, commercial, and state actors following up the marine traffic around the globe, so any attempt would be discovered in a relatively short span. Part of the reason behind this is that there regularly appear faulty information on the AIS system due to broken sensors or operator error. However, in the same way that transponders shouldn’t be seen as telling the whole truth on airliner traffic, AIS shouldn’t be trusted to convey the whole picture of maritime traffic.

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s