South China Sea
Recon is important here.
If you are playing as the Pirates, defend that Engine Room! If they can't get the engines started, they can't take the Bridge!
Remote C4 in the stairways leading to the bridge can be a good defense.
If you are attacking, try to get a team up on the Bridge and in the Engine Room at the same time; that way, you can start the engines and take the bridge before the Pirates know what hit them.
Can't break through? Try gas.