I also found this:
a. License requirements for a marine
SSB are the same as for a VHF
: a Ship's Station License (for the vessel)--endorsed for SSB frequencies--and a Restricted Radiotelephone License (for you, the operator). Yes, a few years ago, it was made the rule
that you didn't need a Ship's Station License if you were operating a radio inside U. S. waters. However, if you're going offshore
and bound for foreign waters, you'll need to apply for one. The Ship's Station License will also get you your MMSID number, which you'll need to fully implement Digital Selective Calling (DSC) on your VHF
or all of the safety
functions on your Inmarsat C system.
No testing is involved--just fill out the form and send the FCC your money
. You can apply on-line or obtain the forms on line to fill out--visit http://www.FCC.gov."
Just like what you said.