Plot hole: When the group first finds the plane, they are all able to hold their breath long enough to descend, search the plane and resurface. Yet later in the movie, even though Amanda can get a full breath of air from the air pocket in the plane, she can't hold her breath long enough to swim to the surface and has to be rescued by Jared.
Into the Blue (2005)
1 plot hole
Directed by: John Stockwell
Starring: Jessica Alba, Paul Walker, Scott Caan, Ashley Scott
Continuity mistake: In the airport scene Scott Caan introduces his new "girl" to Paul Walker and Jessica Alba. In the background behind Paul you see a long-haired brunette wearing a strapless shirt walk out of the terminal and continue past the camera. The shot changes to a wide angle of the four main characters, and a second or so after the change you see the same brunette come out of the terminal again.
More quotes from Into the Blue
Trivia: In the American version of this film Jessica Alba's bikini bottoms were digitally extended to cover her buttocks. In the European version they remain the same.