The bodyguard gets shot in the stomach and a lot of blood is on his shirt. Later when he is found no blood is on his shirt, and he is moving without showing signs of wounding.
When their sub is under attack Butler commands "60 degree down bubble" and his officer replies "60 degree up bubble"
After swimming through the water in clothes, the men roll through dirt under a system of pipes but none of the supposedly wet clothes have any dirt on them after that.
When the ground crew jumps from the plane, it is dark and they are jumping through a storm. On the ground it is dry and sunny.
When the SEAL sniper is being chased by the Russians in some woods, he jumps over a fallen tree. At that moment, he lets go of his rifle. When the camera switches to show the end of that roll, the rifle is at his hand again.
Hiding underwater can stop bullets from hitting you. All supersonic bullets (up to .50-caliber) slow dramatically/stop or disintegrate in less than 3 feet (90 cm) of water, but slower velocity bullets, like pistol rounds, need up to 8 feet (2.4 m) of water to slow to non-lethal speeds. Bullet Proof Water, 360 Degree Swing (2005)(#3.14).
There are no icebergs in the Barents Sea near Murmansk Oblast at any time of year.
Glass is shown in Scotland hunting a red deer stag with a bow in the middle of winter. Red stags are not in season in the winter and it's illegal to hunt with a bow in the UK.
Soldiers are shown diving in waters north of the Arctic Circle with exposed faces and standard wet suits. Later in the film, characters are shown diving beneath the water without any kind of thermal protection at all. The maximum temperature of the Barents Sea even during the height of summer would require the use of full-body dry suits to avoid dying of hypothermia very quickly.
The icebergs in the film show more ice above the water than below it when in fact 7/8 of the mass of all icebergs is below the waterline.
When Glass meets his XO for the first time, the XO asks, 'how was your trip in from Portsmouth?' In the previous scene, Glass is stalking a stag in Lochaber, Scotland, when a helicopter arrives to take him to the USS Arkansas at Faslane, also in Scotland. The distance from Lochaber to Faslane is about 80 miles. If he went via Portsmouth, it would make it a 1,000-mile round trip.
As the US fleet approaches the Russian fleet US sailors are shown in full dress uniform lining the decks of the ships. This would not happen when approaching an enemy fleet on the open sea.
When the SF team member focuses his binoculars on the building at the base, it displays the range as 985m. When he zooms in, the range changes to 2004m. The range should stay the same.
Throughout the movie -whenever welds are shown they are always rough, amateurish messes (always laughingly referred to as "bubblegum" by REAL welders). Nothing at all like what is seen in the real world and especially nothing like what would have been acceptable to lay in a shipyard.
Several camera shots show the US submarines torpedo room. The shots show this to be far, far wider than the hull of a Los Angeles class submarine, or any other submarine for that matter.
The "Russian" destroyer is a "doctored" version of the Udaloy II class. Front gun removed, vertical launcher and RBU added on the focsle.
At around 17 min mark the Capt says submerge the ship. subs are called boats.
Just before entering the fjord, the captain, to the crew, says "Oohrah," a battle cry used by the Marines. The captain would have said "Hooyah!", the Navy's battle cry.
The DSRV-1 "Mystic" in this film was retired in 2008 and replaced by the SRDRS, Submarine Rescue Diving Recompression System.
The port of Polyarny does not lie at the end of a long, narrow inlet but rather on the western side of Kola Bay which is at least a mile wide at that point.
When attempting to dock with the Akula, the DSRV pilot says they are "caught in a rip tide." Rip tides happen in shallow water near shore, so the DSRV couldn't be caught in one.
The special forces group get to the water in the harbor by climbing up a spillway. From the ocean? To lower terrain?
The special forces team is moving in broad daylight on the opposing shore of a heavily defended naval base, unseen by a patrol boat some hundred meters out.
The supposedly well trained Russian special forces line up for a turkey shoot on the bridge, not even trying to flank or pincer the fleeing, despite superior numbers and mobility, and despite being under attack by a sniper. Also, there are helicopters in the base and on the destroyers, but none gets activated to help in the search.
The approach to Polyarny is said to be filled with all kinds of sensors, yet the screens in the command center indicate the ocean ground and underwater cliffs. This is only possible when using active sonar of some sort. The sensor operators will know there is an enemy submarine based the sonar sound, but no action is taken and the submarine seemingly evades all of that.
About 90 minutes, Donnegan severely berates Fisk in front of the entire War Room without having the facts. However, Fisk was given the go ahead for these orders by the President of the United States. It is a gratuitous hole in the plot.
Norquist gives the admiral's team a new frequency for the video feed from the SF team saying the NSA has a few satellite frequencies that they don't normally share. This would not affect the SF team's uplink, which would still be jammed.
The special forces team knows the enemy has discovered their presence when the Russian search teams patrol the base. Nonetheless, they have activated pen lights on their scuba headgear while discussing the situation and the approach. Lights like this, especially moving around when they move their heads while they talk, can be seen over quite some distances. No special forces team in the world would chance alerting the enemy to their presence like that.
The Arkansas is occasionally called a ship, but any experienced sailor stationed on a submarine would know to call it a boat.
Admiral Fisk gives the times of the explosions and appends "GMT". A servicing military man would say "Zulu" for the time zone (which is synonymous with the outdated GMT and the current UTC).
Jayne Norquist, as a specialized analyst for the NSA would not mispronounce Polyarny so woefully. The Russian pronunciation is not Poly-Arny, but closer to pol-yarny. Intelligence analysts prides themselves on accuracy and attention to detail, and someone expert in a foreign power would not mince the pronunciation.
At 1:42:18 -Hollywood cliché #053: an actor mispronounces the word "nuclear".