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Alaska State Ferries

Panama Canal

Cruise ships and ocean liners

Cruising yachts

Oceanographic research ships

Great Lakes and St. Lawrence Seaway

Tall ships

All ships worldwide

We primarily use data reported via the World Meteorological Organization's Voluntary Observing Ship (VOS) program to provide a snapshot of current weather conditions at sea, worldwide. This data can also be used to track the progress of ships at sea. Many ships do not report their weather observations to WMO, or report only sporadically; these ships will not have records in our database.Ships with masked callsigns in the GTS are not displayed. Ships within range of several AIS receiver networks are shown when their positions are available. Additional information comes from the YOTREPS network of cruising yachts; YOTREPS positions are updated only once per day.

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Search for one ship by call sign:

Enter the ship's international call sign, if you know it. Usually it's four or more letters and numbers. To find the call sign, search for the name below.

Map all ships near location:


decimal degrees, negative for west longitude and for south latitude



nautical miles

sailing weather and tide predictions

Ships at sea: positions and weather observations