Other mistake: At the end of the movie where they are looking at the headstone of Jake Hobart, the date on the bottom of the stone is April 3 1913, despite dying shortly before the Titanic sank in 1912.
Continuity mistake: During the placing and arming of the explosive probes, twice the probe being placed is a completely different number to the one that is then promptly armed.
Factual error: When they find the safe they find it is watertight, but a watertight safe at that depth would have imploded from the pressure.
