Continuity mistake: As Chief Phillips is shooting he yells, "You savages, come and get it". After he says this the warrior with the spear who eventually kills him can be seen on the shore running in the opposite direction. In the next shot Lance, who is now at the controls, guns the engine. The boat moves forward, not in a circle, yet two shots later when the warrior throws the spear the boat is further back down the river than it was before not further up the river where it should be. (02:22:20)????
Continuity mistake: As Chef is firing the rear machine gun there are two belts of ammo on the 60 caliber gun behind him, one hanging out of the gun itself and the other one draped over the gun's protective metal side. In the next shot as the captain runs up to him there's only one belt of ammo. (02:21:35)????
Continuity mistake: As they approach the French plantation we see a close-up of the right side of the boat which was just in a horrific Vietnamese rocket and machine gun attack. There's none of the damage that you would expect to see on the side of the boat. But specifically we saw close ups of where the hand-held machine guns are stored, and the spot where Captain Willard is standing which were all hit with heavy fire and riddled with holes. (01:55:40)????
Continuity mistake: As Satisfaction plays in the background, Lance is holding on to a white tow cord as he skis. Earlier as they pull out of Hau Phat we see him holding a blue tow cord before he unwraps his new water skis. Thirty seconds later in another shot he is holding the blue tow cord. (01:15:05)????
Factual error: Captain Willard narrates to himself, "I am beyond their timid lying, morality, and so I am beyond caring" as we see a downed helicopter burning in a tree. The main rotors are detached and would not be sitting on top of the helicopter had it actually crashed and not just been placed there. In an actual helicopter crash the rotors fly off. (01:22:10)????
Continuity mistake: As the boat leaves the USO show at Hau Phat Captain Willard says, "The war was being run by a bunch of four star clowns who were gonna end up giving the whole circus away". He says this as he walks to the back of the boat moving the 60 caliber machine gun on his way so that is faces frontward. In the next shot it's been moved and is now facing sideways. (01:11:40)????