NOYB wrote:
Every boater who travels more than a couple of dozen miles from shore should
consider carrying an Automatic External Defibrillator. They're available
OTC from Sams club for under $1500...and are absolutely fool-proof to use.

As well as a bomb shelter, radiation suits, a couple of quarts of blood
of the same type as each person on board, a staffed hospital room,
helicopter for EVAC operations, complete antivenom kit, and the list
goes on.....how careful and prepared do you want to be?