I took my PSR500 on board with me when I sailed out of Lauderdale last year, they get flaky on XRay though, I advised them I'm a ham and it's for monitoring only, after a few minutes all clear. Now lesson learned, USCG operates encrypted, they have their own set of channels that you can find but all will be P25 with AES256 not in the clear, the only place you'll find them in the clear is on the Marine channels which are easily found with a Google search.
I did ID some local channels on board, mostly hotel operations and some ship command and control stuff but I didn't spend enough time to really figure things out as my wife had me put away the toys and join her for her vacation.
Cheers and hope you don't get hit by a hurricane!