The Gato-class fleet boat USS Cod (SS-224), which completed seven war patrols in WWII and was decommissioned in 1954 only to survive for another 15 years as an NRF training sub in Cleaveland, has been a museum ship there since 1976. Recently, the museum staff has managed to open her long-ago sealed forward torpedo tubes and a pair of outer doors in preparation for maintenance work.
It provides an interesting perspective shot, complete with an inert MK18:
They also found a series of wood crates and metal boxes stuffed inside the tubes that they think are parts and equipment that were stored there to reactivate and upgrade the tubes if Cod was returned to service.
A commenter who was around when the USS Batfish (SS-310) museum did a similar “untubing” in 2009 said the find wasn’t surprising as they discovered “a tube maintenance sled, block and tackle, and all the attachments for loading and unloading torpedoes into the tubes, as well as probably a half dozen miscellaneous torpedo room parts.”
When we see photos of submarine interiors from the WWII-era, there is a general monochrome aspect to them due to the B&W nature and washed out “copy of a copy” life span of such imagery.
Submarine officer sights through a periscope in the submarine’s control room, during training exercises at the Submarine Base, New London, Groton, Connecticut, in August 1943 80-G-K-16013
Well, the USS Cod Submarine Memorial has done the research and determined that the inside of a sub actually had a lot of colors, and are acting accordingly by painting their electrical control boxes gloss black, lockers gray, flashlight bins flat orange, and torpedo pyrotechnic casks red.
It seems that most of the remaining vessels passed into museum status after years as USNRF trainers in the 1950s and 60s, during which the old, “If it moves: salute it. If it doesn’t move: pick it up. If you can’t pick it up: paint it,” mantra came into play during drills and the only paint available was haze gray– so everything got a coat or seven.