Marine traffic can be tracked real time. Use the "search marine traffic" for specific boats, etc.

Link here: https://www.marinetraffic.com/en/ais/home/centerx:-80.082/centery:26.056/zoom:12

This is a global application. Amazing how many boats are on the water.

Suckerbergs boat in port. Red dot w/wide white ring is where she is.

[Linked Image from i.postimg.cc]

GOA