Other mistake: Close to when Tony Curtis and the nurse are going back to the pink sub, there is one scene where in the far background there are two objects moving on the water each creating a wake. It looks like someone is water skiing. A DVD will likely show this clearer.
Other mistake: During the sequence when the crew is working feverishly to get Sea Tiger repaired to leave Cavite, there are several shots of a first class petty officer welding a hand rail, a trivial job that would not be necessary for getting the submarine raised and underway.