Continuity mistake: Bud swims to the moon pool and tries to sneak up on Coffey. Coffey aims a gun at Bud. Bud's right eye is swollen. In the next scene its not, and the following scene it is. (01:43:35)
Continuity mistake: When Bud and Lindsay are in the sub after the big chase, water leaks in and Bud searches for something to fix it. He delivers some dialogue while opening (I believe) a first aid kit. The camera angle switches to Lindsay as she says something, and Bud can be seen in the background opening the kit once again. (01:54:44)
Continuity mistake: When Lindsay is pulled from the pool after she drowns her wet hair is covering her face. In the next shot she is laying on the floor and Bud is smoothing her hair back to give her CPR. The shot changes again and her hair is back covering her face like it was when they pulled her from the water.Tina Gilliam
Continuity mistake: When Bud leaves Jammer behind in the sub, he gives him a strand of rope to keep the two connected. At first Bud keeps the bundle of rope and hands Jammer the loose end, however in later scenes it's shown that Jammer holds the bundle of rope and Bud holds the loose end; as Jammer is feeding him line.RJR99SS
Continuity mistake: When Jammer is alone in the derelict sub and the alien appears, all the electrical devices shut down, as they do in the whole movie. But in the close up shots from the side of Jammer, you can see the light at the top of his helmet is still on.
Continuity mistake: When the crane breaks off and falls into the water, it JUST misses the rig by a few feet (very visible when they're looking out of the window). Then the crane falls off of the edge and starts to pull the rig. The rig is pulled much farther than the previously shown distance to the edge.Minerva