Chew
Senior Member.
Use AIS (Automatic Identification System). It's like flightradar24 but for ships.
http://www.marinetraffic.com/en/ais/home/zoom:11/centerx:-64.82/centery:32.4/
Norwegian Dawn's position: 32 23 59n 64 49 30w
http://www.marinetraffic.com/en/ais/home/zoom:11/centerx:-64.82/centery:32.4/
Norwegian Dawn's position: 32 23 59n 64 49 30w