I was just watching a video and a question I have had for a long time came into mind again.  I was looking at an aircraft carrier.  Head-on and then the cameraman flew around it.  It had an island, quite large, and a long deck with an angled deck.  It was huge.

The sea was relatively calm, and the ship appeared to be level, all around.  How do they do that?  They have that island, it’s not light, they have planes which are in various places or in the air.  They have fuel,  sometimes for the carrier and always for the planes, which is either more full or less full.

How to they build and keep those monsters level, fore and aft and port and starboard?  Is there someone in charge of that, shifting fluids around, maybe planes?  Are they so big it just happens?  When they design them do they take all that into account, putting various machinery in different places to keep it even?  Are there massive trim tabs, which would interfere with efficiency?

It looks to me like a real feat.