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. Additional information comes from the YOTREPS network of cruising yachts; YOTREPS positions are updated only once per day.

All ships worldwide

Tall ships

Oceanographic research ships

Cruising yachts

Cruise ships and ocean liners

Great Lakes and St. Lawrence Seaway

Panama Canal

Marine Society webships

Persian Gulf, Suez Canal, Red Sea

Alaska State Ferries

Cape Horn

Search: look up ships by callsign, or find all ships near a geographic location.

Look up ship's Inmarsat number