Hi,
Several LICSA members have done this race. I've done it since 1998 (I might have missed one or two since?)
It's NOT the ocean. Just the bays off Sandy Hook, the Verrazano Narrows and of course, New York Harbor. Get some charts. Also see image attached.
Plenty of Hobie 16's do it and do fantastic. See results at:
http://fleet250.org/Good luck!
Steven Bellavia
Hobie FX-1, Sail #211