Just after the collision, the surviving characters are seen drifting on the ocean on a wooden platform. Captain Ashland is plainly visible lying down with the group, even though he hasn't yet been pulled out of the water. He appears from below the water about two minutes later.
When we first see the hard candy jar sitting on the shelf, each piece of candy is wrapped in cellophane. When the jar is opened, each piece is unwrapped.
At the beginning, when the Death Ship is steaming full ahead at the cruiser, it is twilight. However, in the shots of the cruise ship it is clearly nighttime.
When the wire that lifts Jackie up the air is shown on the deck, it is run through a loop with no sort of release mechanism present. However, after a few frames of him in the air you see that it now has some short of release mechanism for dropping him.
When Marshall jumps out of the hatch to tackle Captain Ashland, he is jumping towards the outer railing, but when the camera angle changes his movements are in the opposite direction.
An obvious body double is used when Captain Ashland falls into the ocean while attempting to transfer him on to the ship.
When Marshall is searching the meat locker where the bodies are hanging, despite all the bodies being covered in ice indicating that it is extremely cold inside, Marshall's breath cannot be seen.
When Marshall drops the anchor to stop the ship so that they can make their escape, the overhead shot of the anchor falling into the water clearly shows that the ship is not moving.
When Treavor and several passengers are exploring the ship early on, Trevor opens a sailor's unit where, over the bunk, there is loosened cotton batting.
When Nick is trying to free Lori from the shower by smashing the glass door, you can clearly tell that he is hitting the metal part of the door with the board and not the glass.
When Ashland enters the bridge for the last time, the captain's chair has disappeared, but is shown again once the ships takes control of itself to ram the other ship.
The bridge's ceiling is unrealistically low, and looks like the ceiling of an office building. The ceiling of the bridge is two or three inches above the tallest crew members' heads.
When the survivors on the raft first come upon the ghost ship, in a long shot a helicopter is visible in the background.
When Captain Ashland emerges in the German naval uniform atop the ship, three separate long shots of George Kennedy reveal a crew member and camera are plainly visible on the left side of the shot.
When the group first comes up upon the death ship, you can see a person's arm open one of the windows even though the ship is supposed to be unmanned.
Cameraman's shadow visible in the beginning.