What Is VesselFinder and What Can You Do on the Site?

Updated

VesselFinder is a free AIS-based vessel tracking website that shows real-time ship positions and marine traffic detected by a global AIS network. You can use it to locate a specific vessel, watch traffic in a port or region, and track containers. It suits casual lookup and general situational awareness; it is not a source of official navigational or regulatory data.

How VesselFinder works

AIS (Automatic Identification System) is a radio system that ships use to broadcast identity and position data. VesselFinder collects those signals through a global network of receivers and plots them on a map.

Two practical consequences follow:

  • Coverage depends on receivers. Positions appear where AIS signals are picked up, which is typically strong near coasts and busy shipping lanes and weaker in remote open ocean.
  • AIS can be switched off or interrupted. A vessel can be missing from the map without being absent from the water, so treat gaps as a signal to check elsewhere rather than a conclusion.

What you can do on the site

Task What you get When it is useful
Find a ship Position on the map plus vessel details Checking where a named ship is now
View marine traffic Live vessel positions across a chosen area Seeing activity around a port or along a route
Track containers Container tracking by container number Following a shipment's movement

The site describes itself as covering real-time ship positions and marine traffic, and container tracking is listed among its functions.

A concrete example

Suppose a container is due at a port and you want a rough sense of timing. You can look up the container number to see the associated movement, then find the vessel by name on the map to see where it currently is relative to the port. The two views answer different questions: the container lookup tells you what is being tracked, while the vessel map shows where the ship is at that moment.

Limits to keep in mind

  • Free access, but not a guarantee of completeness. The site is described as free; that does not mean every vessel is always visible.
  • Not for navigation or formal decisions. AIS-derived positions are informational. For anything with operational, legal, or safety consequences, use official sources.
  • Detail varies by vessel. What you see depends on what a vessel transmits and whether receivers are in range.

Bottom line

Use VesselFinder when you need a quick, free look at where a ship is or what traffic looks like in an area. Verify anything important against official or primary sources, and read a missing vessel as "not currently detected" rather than "not there."