The Poseidon Adventure

Plot hole: Shortly after the ship flips over, the steward, Ackers, is asked why lights are on. He explains they are emergency lights that will last three hours. The lights are left on throughout the movie, but when they get out it is bright daylight. Considering the ship flipped at midnight, there is nowhere on any ocean where it gets light at 3:00 in the morning (03 hours after midnight).

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