Continuity mistake: When Tyler is resuscitating Katherine he cuts and then rips her swim suit down to her belly button, but in the next shot when she is climbing up the cliff the cut is only up to her breast bone and has a zip on it.
Continuity mistake: When Briggs is talking to the rest of the team on the fiber optic line, the counter on the video screen jumps backwards between shots.
Suggested correction: Sorry to burst your bubble here but there is scuba equipment which allows for talking whilst using a regulator.
They're not wearing such equipment. In the movie they're just wearing regular mouthpieces.
In the DVD commentary the writers explain that the divers should have been wearing full face masks which allow for communication, but the director changed it for mouthpieces, but kept the talking in. They pointed out this mistake.