Update: this is now a live AIS map embedded in our website, courtesy of MarineTraffic.com.

Hover the cursor over an icon to see the details of the ships. Use the + and – buttons to zoom in and out. Drag to move the centre of the map.

Warning: not all ships update their status all the time.  Hence a ship could say at anchor and be moving and vice versa.  But it is a good guide.