Peter, respectfully, I did look at the thread on this board. They have not shown they are approved. Only that they can't see why they shouldn't be allowed. There was a consensus that this unit should be okay - or the user didn't care as long as they were rescued, but nothing from the FCC. They relied upon the fact that a voluntarily equipped vessel did not need a license in USA waters, but a diver is not a vessel. And the FCC does not run on consensus. BOAT US did create a category for the EPIRB portion of this, but that portion doesn't allow chatting....it's strictly position location and personal information transmitted to the satellites.
Note the the reference to the fact that a licensed amateur radio operator may broadcast on any frequency in an emergency only covers licensed amateur operators in the USA.
And none of this means anything in foreign countries. Penalties in foreign countries can be much more sever than in the USA.
Beyond all this, Dr. Rich and Vince have the best responses....it is really not needed in Bonaire.