Operation Pacific

Factual error: The Thunderfish is closing on the Japanese I-boat, at under 6000 yards, Duke orders flank speed. The hydrophone operator on the I-boat would have to be deaf not to pick up the noise of Thunderfish's propellers at flank speed. For those pundits who claim that their sonar might be down, hydrophones are a passive listening system.

goofyfoot

Revealing mistake: When the torpedo is fired at a Japanese ship, the underwater shot of the torpedo cruising reveals it being pulled by a long wire. It is also apparent that it was filmed in a tank with the reflection of the sun on the tank wall.

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'Pop' Perry: Take her down.

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Question: Why do they look into the scope soon as it starts to rise? The view part would still be in the water.

Answer: A good submarine skipper ensure he always has a low periscope profile, as it's easily seen when out of the water too much. That's why he looks through the scope even while underwater, so the scope is only just out of the water.

stiiggy

Answer: It was probably a deliberate mistake by the filmmakers to keep the action and plot moving quickly, rather than realistically waiting for the periscope to be fully out of the water.

raywest

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