My first thought. These guys are the best in the world.
Drop 6 over the side, rebreathers with no bubbles, they have a very good idea where everyone is in the lifeboat.
They quietly surface alongside, get a quick verification from ship (probably by signal light, not radio,) that everyone is in the same places.
Throw a flashbang into the boat. 4 SEALS on one side of the boat put one hand on the gunwale, rise up and start shooting the bad guys. Quad tap them all.
Flashbang throw to end of hostilities? Less than 14 seconds.
My kind of combat.