Colin Clarke – The three key tenets of a submarine

Three key tenets to a submarine.

Stay safe, remain undetected, complete the aim.

Under the second one of remain undetected, everything you do needs to be … if it’s going to make a noise, and any noise could be exploited by your enemy as a detection opportunity, you need to ask permission to do.

From opening a hull valve, clearly to running up engines, changing over things like fresh water tanks, to even, back in the old days, and still depending on where you are and what your task is, to watching movies, it all makes noise.