Continuity mistake: Towards the end of the film, Tom Skerritt is on the same aircraft carrier as the fighter jets, but right after the jets bomb the enemy soldiers, Tom Skerritt arrives in a helicopter. There is no way that a helicopter is just as fast as an F-18 fighter jet.
Continuity mistake: The 2 fighter aircraft that took off from the carrier were unarmed. Later shots showed the planes armed to the teeth.
Factual error: In the final fight scene, you hear members of the SEAL team yelling "Grenade!" before chucking a grenade. They are supposed to yell "Frag out!" as yelling out "grenade!" is a warning of incoming enemy grenades.
Factual error: The SEAL team communicates with the commander on the ship with a man pack VHF/UHF radio. Not only does the radio man not erect the antenna but it would not be possible to communicate with the ship using this type of radio because it is a "line of sight" radio designed for ground to air communication. The commander on the ship uses a satellite phone to respond, it is not possible to use this type of radio to communicate with a satellite phone. Also, the Lieutenant doesn't use the push to talk button on the side of the microphone and uses the radio more like a telephone, the equipment simply doesn't work that way. The time is from the director's extended cut.
Factual error: During the movie Tom Skerritt is seen talking to the SEAL team from the carrier's flight deck. That's impossible; command & control operations are being performed from the inside of the ship. Besides, roar on the flight deck would be so loud making it impossible to hear each other.
Revealing mistake: When Dr. Kendricks closes the eyes of the dead woman, you can see on woman's neck, that she is still breathing.
Factual error: The optical red dot sight on Bruce Willis' M16 rifle is mounted back to front and would be useless.
Audio problem: Towards the beginning (in the night) the doctor is giving a young baby a shot. When she gives it to her it go to the girl's face (whose eyes are covered) and her mouth is closed when you can hear her crying.
Continuity mistake: In one of the scenes with Tom Skerritt talking to Bruce Willis, take a look at Tom's watch. It starts out at about 4pm, then 4:35, then 4:20.