Visible crew/equipment: In the scene where Jeremy Kemp and George Peppard are playing daredevil in their planes and Kemp's plane hits a brick tower there is a shot of the plane plummeting to the ground. The alert viewer can see the shiny metal wires that were used to support and guide the plane on its way to the ground.
Audio problem: During the chase at the end of the movie, the police cars' tires squeal in the dirt.
Factual error: The uniforms worn by the engineering force are from the wrong era. Prior to 1941 the left arm rates had the head of the eagle pointing to the wearer's rear. Steve McQueen and the rest of the Engineering force rate eagle head is pointing forward, which is from WW2.
Continuity mistake: The two jets are shown flying at the same level, one in front of the other. In the next shot, from the pilot's POV, the other jet is above and to the left, not level. Then, as they overfly the boats, they are level again. (02:02:59)