There is a ship afloat without a captain,

He has a good, tight crew, and they manage to keep the ship afloat.

It's the right thing to do. He is the captain of the ship and it needs to be said. Somebody has to stand up and say what needs to be said.

The most important consideration in this matter was that Cmdr. Waddle was the captain of the ship, that the rest of the submarine force is watching him, his peers are watching him, guys who may be in his shoes in the future are watching him, and it was the right thing to do for those reasons.

There can be only one Captain to a ship.

You cannot sink someone else's end of the boat and still keep your own afloat.