Tripod deck mount M-2 in 50 BMG might just be a decent deterrant.
I'm curious, do folks here really think it is that much worse out on the open ocean than it is on the open road, or down the wrong alley, or up in the forest trail? There've always been plenty of people willing to separate me from my boodle; don't seem to matter much the terrain.
I guess perhaps the big difference is out on the open ocean, there really ain't no one to hear your screams. Not having at least the nuance that maybe there's a cop somewhere nearby makes folks a little more paranoid?
So fair warning then. If you see me on a boat out in the ocean somewhere, you can count on there being at least one barrel pointed in your direction, even if you don't see it, at least until I've cleared ya. Har!
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The ultimate result of shielding men from the effects of folly is to fill the world with fools.
-- Herbert Spencer, English Philosopher (1820-1903)