If you are looking for songs about Navy life as opposed to songs about ships, a principle source would have to be Cyril Tawney who served as an ERA (Engine Room Artificer) and I believe also in the submarine branch. "Grey funnel line" is probably the most direct reference to navy life and from my experience a rather more accurate reflection of lower deck feelings than the "gung ho" stuff above. "Chicken on a raft" is a personal favourite, particularly the image of the Jimmy, (Executive officer in USN terminology).

Pete M

PS Ref "four oh war machine" either US navy gunnery has improved out of all proportion or some one is having someone on!