What do you call a perfect submarine?
Sub-optimal.
I knew a submarine sailor who wasn't very talkative or energetic
He was a subdued sub dude.
We all have a submarine in our heads but we're not supposed to think about it. It's all sub-conscious.
I saw a documentary today about a submarine that recycles 87% of its garbage.
But I believe this sub's doing even better!
BREAKING NEWS: Vietnam accidentally sank its own submarine killing all 350 on board
Whoops, wrong sub.
I got fired from my job as a submarine pilot.
I just don't get it. My performance reviews always said my work was sub-standard.
BREAKING: The United States, after mistaking it for an Iranian submarine, has struck a utility submarine with an underwater torpedo that was en route to displace the shipping carrier blocking the Suez Canal, killing all 169 aboard
whoops wrong sub
Do you know why the U.S. Navy always keeps at least two canaries on board each of their submarines?
Because everyone knows that if you have a big sub you also need a good set of tweeters.