Perhaps the brass monkeys were mostly used on shore at a fixed base and not on ship.
I would agree with you on that, Jake. Can you imagine 32 pound cannonballs rolling around the deck in a gale? Not my cup of tea at all...
Which, makes me wonder what kind of drink the song "Brass Monkey" by the Beastie Boys refers to.
isn't that some varient of "spanish fly"?