Sikke et værktøj at gi' piraterne (Data udfor Somalia synes dog at være censureret væk) ...
Great tool for pirates (Somalias coast seems to be censored though) ...
In the past few years, commercial shipping vessels have been required to broadcast a vessel position "transponder" similar to those used by aircraft. The system used is called AIS (Automatic Identification System) and uses GPS for position data, but also broadcasts other important data such as ship name, course, speed, and more. The system allows vessels at sea to have a much better awareness of other ships and, in particular, helps avoid the potential of collisions as the seas get increasingly more crowded (especially in ports).
Some academic researchers have been running a web site called MarineTraffic.com that shows the positions of ships around many ports around the world. They rely on a community of data collectors who simply need an AIS receiver and an Internet connection to provide data on ship positions for a given port. A number of similar sites have offered such data on the Internet before (for example, I mentioned VesselTracker.com a couple of years ago). Some of the vessel position report sites are only available on a subscription basis. But, MarineTraffic.com is the largest collection of data I've seen and its available for free. [...]
Read more: http://www.gearthblog.com/blog/archives/2009/05/current_positions_of_10000_ships_wo.html