Factual errors: Both American aircraft shown in the film (a Piper J5A observation plane and a Douglas C-47 transport) carry the national insignia markings of a white star in a blue roundel, which was authorized on August 18, 1942. This is incorrect for the period depicted in the film (early December 1941 through late April 1942), when U.S. insignia was a white star inside a blue roundel with a red ball in the middle of the white star.
Anachronisms: By the time this movie was made, the class of PT boat used in the Philippine Islands was not available. They substituted 80-foot ELCOs for the 78-foot ELCOs actually used in Manila Bay.
Continuity: When Lt. Sandy Davys attends the 'party', Lt. JG 'Rusty' Ryan takes a big swig of his drink, spilling some of it down his face and shirt, yet in the next scene, he's completely dry.
Revealing mistakes: The Japanese air attack at the beginning of the movie shows the aircraft strafing the PT boats. None of the aircraft flying in the scene are carrying bombs, nor are there attachments on the wings for carrying bombs.
Continuity: During the aircraft strafing scenes when LTjg Ryan is injured, the planes are attacking from astern of the boats. The bullet strikes on the boat start from the starboard bow and go across the boat to the port side, indicating a frontal attack.