Trivia: In the scene when Lauren Holly, gives Kelsey Grammer, a kiss, her hitting her elbow was not in the original script. She really did hit her "funny bone" before walking off camera. The director had decided to keep it in the movie so they had to film an alternate shot of Grammer, laughing when it happened.
Trivia: Tom Arnold turned down the role of Lt. Com. Dodge to play the lead in "McHale's Navy."
Answer: Looks like Mush Morton, but that wasn't his ship. The real name of the submarine used in the movie was the Pampanito (SS-383). Her captain was Charles Jackson. It might be his picture on the wall. I can't find a picture of him.