Continuity mistake: Just as the rocket attack starts on the boat Chef is reading his mail and says, "hey Lance ". Look closely at the bullets on the machine gun right behind him, they're all draped to the left of the gun, no one has touched them but in a previous shot they were draped to the right the gun. The M-16 has also been moved. (01:51:40)????
Continuity mistake: Chef says to Captain Willard, "I thought you were going in to blow up a bridge or some railroad tracks or something" and he has something strapped around his waist. He never touches it but ten seconds later when we see him again it's strapped across the middle of his chest. (02:24:30)????
Continuity mistake: On the boat while Captain Willard reads Kurtz' file Clean starts making noise by tapping his drumsticks. This annoys the captain and as he gets up to confront him we see, at the right of the screen, the helmet that Clean is drumming on. In the next shot the helmet and its strap have been moved around the metal pole that holds up the roof. (01:19:05)????
Continuity mistake: Colonel Kurtz sits reading articles from Time magazine facing the captain and the sun is behind him shining right into the doorway. When we first see Captain Willard locked up in this room he's facing Kurtz and the beams of sunlight are coming in from his left, which is 180 degrees in the opposite direction from the shots of the colonel. (02:48:30)????
Continuity mistake: Colonel Kilgore walks over to a VC soldier with a stomach wound and one of his soldiers follows behind carrying a thermos with an orange cap in his right hand and nothing in his left. Kilgore turns and says to this soldier, "Give me that canteen" and in the next shot the canteen appears in his left hand. (00:29:20)????
Continuity mistake: There are four shots of the fighters that drop the napalm. The first time we see the jets there's only three of them and the part of the nose in front of the cockpit is painted black. The second time we see them there are five planes, the third time we see them there are four without black paint and the last time we see them there are three. (00:47:55 - 00:48:45)????
Continuity mistake: The day after the USO Playboy Bunny show, the patrol boat canopy is set afire by some pranksters from a passing boat. Yet, that night in the scene at the Do Lung Bridge, the canopy is intact. It goes through some amazing transformations during the remainder of the picture. (01:41:33)
Continuity mistake: Two other patrol boats pass them on the river going the other way and Chief Phillips yells over the megaphone "is that you Lazaro?". The guy whose pants fall down has a cigarette in his mouth, and his pants are down further in the front as the boats approach. In the next shot after they pass by, he has no cigarette in his mouth. (01:16:20)????