Deliberate mistake: At the beginning and especially at the end, Julianna Margulies spends extensive time in the ocean, wearing nothing but cargo pants and a T-shirt. Considering the movie takes place just off the Bering Strait, wouldn't she have quickly frozen to death?
Factual error: The gold bars that the crew finds must be some new type of light weight gold. There's no way that Julianna could stuff a gold bar in her back pocket and then pull it out and toss it on the table and Greer simply tosses it back and forth like it was plastic. A gold bar weighs around 27 pounds, you definitely wouldn't be tossing it around.
Revealing mistake: When Epps is holding the detonator and it is knocked out of her hand, Watch as it lands - when it hits the ground the trigger is pressed in yet there is no explosion.
Factual error: During the scenes where Santos is working on the main engines, he is actually working on a generator. A tug of that size would have a set of much larger engines with reduction gears (transmission), or be hooked up to large electical power plant to provide propulsion.
Visible crew/equipment: When the tug leaves the harbour in search of the (ghost) ship you can see the waves of the ship from which the scene is being filmed.
Continuity mistake: When the demon meets the crew in a bar and asks them to find the lost ship he saw from the air, notice the beer bottles on the table; they keep changing from full to half full to full again, mainly the foam at the top.
Factual error: There were absolutely no signs of ice or frost in any scenes while they were in the Bering Strait.
Continuity mistake: In the scene right before Epps finds the little girl's skeleton hanging in the closet, she is seen walking down the hall looking for her. In one shot, she is wearing the heart locket; the same locket she finds on the dead girl minutes later.
Continuity mistake: In the scene where the captain's face is falling off because of the wire, he is leaning forward. However, in the next shot his body falls backwards, though he should have fallen forwards.
Plot hole: After the small boat blows up, all the characters are off the big ship. They magically appear back on top of the main ship, but had absolutely no way of getting up there.
Factual error: The wire which cuts the dancing characters in half severs their torsos in a neat line a few inches below their armpits - but their arms remain intact. They should have been severed too, a few inches below the shoulder, and should fall away from their bodies separately.
Deliberate mistake: If the captain is bending over the girl to protect her and the line is at about mouth height for him, the line couldn't have gone straight through his mouth. Instead, it would have run from the back of his lower jaw up and horizontally to his left eye.
Revealing mistake: In the beginning of the movie where the line cuts the dancers in half, blood is visible on the dress of one of the dancers before the line cuts her. This is best viewed in slow motion on the DVD.
Plot hole: At the end, there is an explosion large enough to destroy and sink an entire ocean liner, but Julianna Margulies, who was sitting right next to where the explosion went off, not only lives, but is virtually unscathed? Yeah, right.
Deliberate mistake: When the passengers are cut by the wire while dancing, some of the clothing on the torsos defies gravity. A man's coat tails and pants fall but a woman's dress stays put when nothing would have held it from falling from her lower half in the same way.
Continuity mistake: In the scene where Epps is looking at the swimming pool, when she falls backwards from seeing Katie at the top of the stairs, there is a safety ring at the bottom of the pool. Yet later on in the film when Katie is showing Epps what happened to the people in the ship and how people were shot in front of the pool, there is no ring.
Plot hole: Ships only steer when moving 'through' the water, not while adrift (moving 'with' the water/current). So the whole idea of fixing the rudder to steer away from the rocks without any propulsion is nonsense.