goofyfoot

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

Continuity mistake: When Thunderfish engages the Japanese I-boat, the first range and bearing indicates that the sub is some 6000 yards distant. Less than a minute later, the range has dropped to 900 yards. That would mean that even if both vessels were on directly opposite courses, their combined closing speed would have to be in excess of 250 nautical miles per hour, impossibly.

goofyfoot