3.5 minute video showing the propeller turning and the sounds from the retired 1944 USS Jerehmiah O'Brien Liberty Military Ship berthed in San Francisco at Fishermans Wharf. Once a month they fire up the boilers and turn the propeller while at the dock to keep spider webs out. Random shots of the propeller turning while at dock. Video was taken with a handheld Smartphone Samsung Galaxy Note 2 with no editing. 3:29 is Alcatraz Island in the background.
https://www.ssjeremiahobrien.org/
https://en.wikipedia.org/wiki/SS_Jere...

People are asking about the dents which appear to be bullet strikes. This ship was mothballed about 30 miles east of San Francisco for many years. I'm assuming it was vandalized by being shot at by people in boats.

In this video, you are inside the engine room with parts moving:    • S.S. Jeremiah O'Brien Steam From Dryd...