I assume SwampGhost meant....
.... back in the days when drug runners were killing people and hijacking their ocean-going sailboats and cabin cruisers to use as drug haulers...
... not "back when he was running drugs..."
I've had plenty of friends keep weapons aboard, to this day, when sailing in the Caribbean due to that threat, which is still present but not as common as it was in the late 80's and early 90's.
Most of the boaters I knew favored stainless 12ga marine models of some sort.