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.
Revealing mistake: When the US Navy engages the enemy at the blockade on the Yangtze River, during combat scenes, a sailor's (prop) bayonet wiggles on board the San Pablo.