I find corvettes behind tortuga, like about two or three of them at a time back there. Also I find the flag one sailing from Kingshead to around Cutthroat and maybe even around Outcast Isle.

:laughks2: Too bad I didn't know this when I needed to sink 15.. and I was waiting for one to respawn after another over and over again.. took quite a while.

i finally found mine between cangrejos and padres

There are also vettes between the Anvil and De Porc.

For one or two of the quests that required several kills of vettes...I found 2 to 4 vettes off the coat of tormenta to the right (coming out of Port Royal) they seem to respawn as Sentinals then back to vettes...hope that helps

If I knew this before.. I had to sail a lot to get my corvettes for quest..
Anyway, it's good to know where to find every kind of enemy :)