Continuity mistake: When Hooper gets his gear from below, after the explosion in the engine room, he runs to the deck passing Quint using the fire extinguisher. The camera pans from Brody, who stands on the bridge deck, to Hooper right below him. So where exactly is the tall iron ladder that leads up to the bridge deck in this shot? It should be behind Hooper, in front of the window, but it's gone. Don't fret, it's back in the following shots. (01:49:05)
Continuity mistake: At Margaret's desk in the bank, her name is spelled "Margret" on the name plaque prop, but at the end of the film, her name is spelled "Margaret" in the credits. (00:51:10 - 02:03:25)