Marine Traffic
Marine Traffic provides real-time information on the movements of ships and the current location of ships in harbours and ports. A database of information on the vessels includes for example details of the location where they were built plus dimensions of the vessels, gross tonnage and International Maritime Organisation (IMO) number. Users can submit photographs of the vessels which other users can rate.
The basic MarineTraffic service can be used without cost; more advanced functions are available subject to payment.