Factual error: At the very beginning of the movie it says "Gloucester, Massachusetts 1991" and shows boats in the harbour including the Leisure Casino Cruises ship. Casino cruises did not start in Gloucester until 1997 or 1998.


Factual error: The rough wave is going the wrong way. When they left the eye and entered the "Eye Wall" (the most powerful part of hurricanes), they suddenly meet that massive rouge. The problem is, the powerful rotating Eye Wall's forces push massive waves AWAY from the rotating center. The rouge in the movie was headed toward the hurricane's center, but the Eye Wall would have broken it down, demolished it and sucked into the rotating momentum of hurricane. It never happened.


Revealing mistake: Towards the end when the boat is going up the huge wave, notice Billy and Bobby are keeping their balance although the boat is straight up and down.


Revealing mistake: When the shark is on the deck of the Andrea Gail, you can see the equipment underneath it that is making it move.