Living on the coast is overrated. It's windy and cold, and the salt and brine wreaks havoc on your hair.
As for the manning of ships, it doesn't really make any sense for me, that an undamaged ship should take damage in order to man a captured ship. Sure, if you want to use the ship straight away, that could be the solution by transferring half your crew over to the other ship, and hope that it isn't hulled or in any other way crippled, but really I'd think you'd drag the ship to a harbour for repairs and refitting, and give it a new crew instead of breaking up an old one (especially if you have an experienced or veteran crew).
A captured ship should be *is* Broken, and probably spend however long on the drydocks it takes to repair and refit it. Getting it into harbour shouldn't really affect the fighting prowess of other ships, since it takes a skeleton crew to man it for such a task - and I seem to recall that (war)ships have been known to historically carry extra hands just for such tasks.
If you want what I believe is a more accurate rendition of the what and hows of nations capturing ships and manning them for the purpose of bringing them to the nearest friendly harbour, take a look at the Hornblower-series (or books).
(Besides, I'm not sure pirates are the best example, since firstly they don't really answer to anyone, and don't consider themselves part of a nation or a fleet per se. And secondly, I imagine any pirates climbing aboard a captured vessel wouldn't be looking to get back onto their original ship and join their old crew. They'd see it as a way of branching out and start their own little piratey-gang, no?)