Factual error: When they go into the water, they put mouthpieces in, but, a few times, they talk to each other, which is impossible with mouthpieces in.
Factual error: Denham is obviously shooting a sound film - he has a sound recordist with him along with the bulky and awkward recording equipment typical for the era, and they discuss the problems of recording dialogue on board. But not once do we see him filming with sound. We see the crew recording dialogue - synchronised sound, recorded on location, which is utterly impossible given the equipment they have and the circumstances under which the fim is being shot. We never see a microphone, a boom pole or a tape recorder. His camera isn't even 'blimped' - soundproofed - and it's handcranked, which makes a racket. They can't be planning on adding the sound later - why have the sound recordist and his bulky and heavy equipment there with them if they are? We see the crew recording dialogue - synchronised sound, recorded on location, which is utterly impossible given the equipment they have and the circumstances under which the fim is being shot. The whole point of post dubbing dialogue is that you don't need a sound recordist in the first place.
Factual error: When Elektra closes her cell phone on McCabe, a dial tone can be heard. Cell phones don't have dial tones. Even if they did, Elektra hung up, so nothing would be heard.
Factual error: In the scene in the glass elevator, when Mike Teavee wants to push a button, he presses the TV Room button. The elevator stops going down and immediately moves horizontally. The characters within the elevator are thrown against the wall from the sudden change. However, they are thrown against the wall that is in the direction the elevator is now moving, instead of the opposite wall as they should have been. (01:20:15)
Factual error: The crescent as emblem on Saracen pennants is anachronistic as it appeared on Islamic military flags no sooner than the 15th century A.D.
Factual error: There would not be so many people standing around on the flight deck without some type of ear and eye protection and a float coat.
Factual error: At a stop on the Niger River, before they arrived in Mali, Dirk tells Dr. Rojas of "the angel wing clam" and calls them "Petricola Pholadiformis" and says that "this river is the only place on the earth they are found." Three problems: First, Petricola Pholadiformis are actually called "False angel wing" and are found many places in the world in fresh water (but seldom in the Niger River). Second, what's known as the "Angel wing" shell (no "false" in its name) has "Cyrtopleura Costata" as its scientific name. Cyrtopleura Costata ("Angel wing") is found in salt water. Third, Dirk also said they "glow in the dark"; some varieties of Cyrtopleura Costata shells will glow if exposed to ultraviolet light but none glow from their own internal source. Petricola Pholadiformis shells don't glow at all.
Factual error: When they're near the ferry, the fiery train zooms by. Passenger trains along the Hudson River run along the east bank of the Hudson, not the west bank, where the ferry was departing. (00:56:55)
Factual error: In the sequence where the animals get on the first subway, it says they are on the 59th St subway. But, there is no 59th St subway in NY. The only subway station close to 59 is the 57th St subway.
Suggested correction: While the other correction lists a 59th street, that's in Brooklyn. There is one in Manhattan though, 59th - Columbus Circle, which is also the south-west corner of Central Park.
Suggested correction: There is definitely a 59th street subway station: https://en.wikipedia.org/wiki/59th_Street_ (BMT_Fourth_Avenue_Line).
Factual error: Stone sneaks aboard the USS Independence (CVA-62) to investigate the bad guy's arms cache..yet, when he dives into the water, he is jumping off the USS Hornet (CVS-12). (00:50:35 - 00:57:45)
Factual error: On the hike to the cave, Sarah and her friends encounter a deer carcass - a red stag, which are not found in North Carolina.
Factual error: When the train is travelling away from Paddington Station, the locomotive does not have a number on the buffer beam, but has a number plate on the smokebox door. It also has a large 'British Railways' symbol on the tender. In 1940, the Great Western Railway would have had the number on the buffer beam and a either a small GWR logo on the tender or Great Western in full. British Railways wasn't created until 1948.
Factual error: Luc Crash holds the match unreasonably close to the gas-soaked priest, whom he intends to play with and not actually burn alive. At the distance he held the match, the fumes from the gas would have caught fire.
Factual error: At what is supposed to be the Portland, Oregon station, the train cars and conductor's hat are prominently labeled for a Canadian railroad. Passenger trains from Canada do not travel as far south as Portland.
Factual error: The French Cuirassiers are all carrying lances. Cuirassiers did not carry lances - their primary weapon was the sword.
Factual error: This movie takes place in 1850, but the "Confederate States" and "Confederate army" are mentioned. There was tension between "free" and "slave" states in 1850, but the American civil war was 11 years in the future.
Factual error: In the first scene at the Pentagon, the sergeant tells the other officer that all satellites are being put into geosynchronous orbit to "hide them behind the planet." But objects in geosynchronous orbit don't remain hidden behind the Earth relative to the sun; they orbit once a day, remaining over a particular longitude on earth. Therefore, they would be subjected to the magnetic storms every day, during daylight at that longitude.
Factual error: The bat signal at the end of the film defies physics. The spotlight is a few feet across and is projecting the signal onto clouds far above. To do this, the light beam should get wider as it climbs up (like a flashlight's beam aimed at the ceiling). Yet the shot of the clouds shows rays of light getting wider as they go downward, like sun rays through the clouds. For this to exist, there's either a bat signal floating far above and through the clouds, or the one on the roof needs to be several miles wide, focusing a beam that narrows as it climbs. (02:09:15)
Factual error: Bree is on hormones up until the day of her surgery. In reality, estrogen can't be taken for several weeks beforehand because it increases the risk of blood clots.
Factual error: In Bridget's scrimmage scene she dribbles the ball all the way down the field to score a goal. However, the defenders of the other team were running away from her. In a real soccer game of that level the defenders would have been all over Bridget.
Suggested correction: Sorry to burst your bubble here but there is scuba equipment which allows for talking whilst using a regulator.
They're not wearing such equipment. In the movie they're just wearing regular mouthpieces.
In the DVD commentary the writers explain that the divers should have been wearing full face masks which allow for communication, but the director changed it for mouthpieces, but kept the talking in. They pointed out this mistake.