[trans]

For a warship, very roughly one man per three tons burthen, much less for a merchant ship. In Treasure Island the Hispaniola, a schooner of "two hundred tons" was even handled temporarily and in a very rudimentary way by one boy advised by a wounded, hung-over pirate (although that was fiction).

As a wild guess, for merchant ships a normal minimum crew might be something like 6 plus 1 per 100 tons.