This is the place for Sailing. Please be aware that these boards are open to public viewing so do take care when sharing personal details. We have a private messaging system which we recommend for personal sharing. Click on the posters profile to send them a private message.
Oceana has created an interactive map to let people track sharks and commercial fishing vessels.
http://globalfishingwatch.org/map/workspace/gfw-tasks-766-sharks-v1