Air-Vent Passageway: It is utilized, but handled a bit more realistically than most examples of this trope. The ducts are wide enough to crawl through without very much effort, but one character does get stuck in a compressed section and has to be helped out, another one suffers from claustrophobia, and the heroes nearly drown due to the rising water because it takes a lot of effort to get the panel on the other side open.
Anyone Can Die: And indeed almost everyone does including the primary protagonist, Robert.
Artistic License - Physics: Lots and lots of examples, from Convection Schmonvection, to the ballroom windows all imploding at exactly the same time, to flaming columns of diesel fuel, to that bow thruster motor being so powerful it creates a 100 mph wind tunnel and easily sucks in a heavy acetylene tank.
Asshole Victim: Lucky Larry. He completely ostracizes Robert in front of the others before he takes his turn to cross the fallen elevator track, and is crushed underneath an entire falling engine.
Beauty Is Never Tarnished: Everyone else gets thoroughly soaked several times before Emmy Rossum's hair finally stays matted down like it should. After that, everyone's a mess.
Blatant Lies: "Kick him off! He won't die!" (Not that anyone was buying it, most especially the victim, Valentin).
Possibly averted, if the line was "Kick him off! You'll both die!"; it's pretty hard to make out what they're saying.
Bury Your Gays: Subverted; despite preparing to commit suicide just before the wave hits (he's despondent over the end of his relationship), the lone gay character, played by Richard Dreyfuss, is one of the final survivors.
Claustrophobia: Elena suffers from this, and has to be physically dragged inside a flooding air vent that offers her only chance of survival. She also has a momentary panic attack when one of the others gets stuck inside.
Convection Schmonvection: Very much so. At the very least the door which is hot enough Dylan can throw water onto and it boils - Conor probably didn't need the demonstration if the door was that hot - you could probably smell the hot wood and feel the heat radiation. Also the room where the diesel fuel falls from the ceiling and ignites.
Cool Clear Water: Let's not even get started on how disgusting and murky that water inside the ship should be, having filtered through rooms and rooms full of god-knows-what.
Averted in in Real Life - the cast often dealt with infections from spending so much time in the water even though the water was pretty clean.
One notable example has to be what happens to Lucky Larry, as the ship drops anengine on him.
The crowning example was what happened to Robert. Swimming on a one way trip to turn off the bow thrusters, he finds the emergency-stop destroyed. In his Dying Moment of Awesome, he manages to reverse them instead, allowing the survivors to throw an explosive gas tank into the props to destroy them.
Disaster Movie: Based on one of the most iconic disaster movies of all time.
Kill 'em All: Averted. There are are five or six survivors out of a manifest of thousands - but pay no mind to all the deaths, some of the protagonists survived!
Made of Explodium: At least somewhat justified: the ship has an ample supply of natural gas for cooking and other purposes, and that goes boom quite nicely once it breaks out of its plumbing. At the end, the protagonists throw a tank of acetylene into the bow thruster, which explodes spectacularly and takes the engine out.
Middle-of-Nowhere Street: What ocean they are in, where they embarked from, where the ship was supposed to let off afterwards - completely unimportant to the plot and not mentioned. All we know is it's far enough from shore to have a sizable rogue wave, the captain says at most they are a few hours from rescue, and it's cold outside.
Actually, a monitor at Diego Garcia naval base indicates Indian Ocean.
Only a Flesh Wound: Christian spends the first part of the movie with his leg pinned. Once he's out he has a nasty gash that needs to be treated. Doesn't stop him from running and swimming at all.
Reasonable Authority Figure: Captain Bradford does his best to keep the passengers calm after the ship capsizes, pointing out that emergency beacons have been activated, and that the ballroom is essentially a giant air bubble. While he does warn Robert about trying to make his way through the ship, he doesn't try to stop him and the others when they leave.
See Water: Very obvious in the flooded-passage scene, when they use flashlights to check one another's progress and avoid obstacles.
Soft Water: When they leap off the side of the ship.
Super Cell Reception: Richard has a cell phone signal out in the middle of the ocean. Possibly justified; equipping a cruise ship with a "pico-cell"note basically a small and very short-range cellphone mast linked to the ship's main radio antenna is quite possible at the time the film was made. His roaming charges were probably astronomical, though.