Continuity mistake: The design of the ship's bow changes significantly while at sea. The white form on top of the bow used for mooring first does, then doesn't have an indentation on top, possibly with a bolt in the center. The point where the curved railing meets the straight side railings either is or is not connected by a top horizontal bar, and the gap between the vertical posts changes size. Another mistake on this site mentions the anchor design change, but also the metal walkway is made of tubular metal bars -or- flat bars that are more numerous and closer together. (00:30:15 - 01:21:00)
Continuity mistake: When Jack and Fabrizio are at the bow, the anchor well below them is black. Along with that, the foremost railing is not connected with the rest. But when Rose and Jack are there the well is white and the railing connects. Plus during the "flying" sequence the gap between the vertical bits of the railing is different in different shots of the ship. (00:30:40 - 01:17:35)
Continuity mistake: When Jack cries he's king of the world he raises his arms pointing in an 11-12 o'clock direction. A frame later, from a different angle, they're in a 9-10 o'clock direction. (00:31:00)
Continuity mistake: When Jack is howling at the front of the ship, he puts his arms up. His left arm is behind the rope, but in the next shot of him, his arm is in front of it. In the next shot, it is behind again. (00:31:40)
Continuity mistake: As Rose walks down the end of the ship before attempting suicide, a row of benches is visible behind two yellow bolts on the deck. However later in the film, as Titanic is about to go under, Jack tells Rose to "Kick for the surface and keep kicking." Then in the next shot as the ship sinks further, the benches are now in front of the yellow bolts- evidently further than they previously were. (00:31:50 - 02:44:15)
Continuity mistake: About half an hour in when the rear of Titanic is shown, look at the very rear of the ship and you will see a red sign (near the triple screws) to the right of an over-hanging light. Shortly afterwards when Rose approaches the rear of the ship to jump off, the sign has now moved to the other side of the light. (00:31:50 - 00:36:15)
Continuity mistake: At the very beginning of the lunch scene, Rose's hair is really red. But in other parts of the film, it's a deep brownish red. The colour changes in different scenes. (00:32:10 - 00:38:10)
Continuity mistake: After Cal throws Rose's cigarette away, she lowers her hand. Then there's a very brief angle on Molly Brown where Rose is lowering her hand again up to a point where it disappears offscreen. Then a millisecond later it cuts back to Rose and her hand is magically raised and still, no sign of her lowering it, and shortly after she lowers it while Cal extinguishes the cigarette and she places her index finger on the holder. Close-up on Rose and her fingers are in the previous position and she is extending her index finger again to hide the holder. So there's actually 2 mistakes in a lapse of 3 seconds. (00:32:10)
Continuity mistake: When Rose, Cal and the others sit around a table talking and drinking, and Mr Ismay says something. His hands are locked together by his fingers, but in the following wide shot his left hand is down by his knee and his right is holding a fork with food on it. Also, Rose puts the cigarette holder to her mouth and takes her left hand away from it but in the following shot her left hand is still on it. (00:32:30)
Continuity mistake: When having lunch, Cal takes Rose's cigarette off of her hand and talks with his hand next to his jaw. Depending on the angle, the hand is up or down. (00:32:30)
Continuity mistake: When Jack shouts he is king of the world, the shadows at the bow of the ship (where Jack and Fabrizio are standing) are shorter and point to the right. On much of the rest of the ship, they are longer and the angle is very different, pointing closer to the stern. (00:32:55)
Continuity mistake: During the first meal on the Titanic (the one where Cal plucks Rose's cigarette from the holder) the stone on Rose's necklace changes between almost disappearing in her dress and about two inches above. (00:33:10)
Continuity mistake: When Rose and Jack are running down the corridor after the water breaks down the doors and comes rushing in, Rose has on flat shoes instead of heels. This was probably done for safety reasons. (00:34:30)
Continuity mistake: On the night of Rose's attempted suicide, we see her with a necklace on at the meal which disappears when she reaches the end of the ship. There was a deleted scene showing her removing it in her room, but without that it just vanishes. (00:35:00)
Continuity mistake: When Rose runs to commit suicide, the people she bumps into disappear in the immediate aerial angle. (00:35:10)
Continuity mistake: When Jack is showing Rose how to spit and is interrupted by the arrival of her mother, the glob of spit on his face moves from the side to the middle. (00:35:45)
Continuity mistake: When Rose is running to get to the stern to throw herself off she starts by running on the first class A-Deck promenade. Then when the whole stern of the Titanic is shown sailing, Rose runs out from the 2nd class B-Deck promenade, a deck down. The only way that these two promenades were connected was by two ladders, which Rose passes when she keeps running. It makes no sense to go down the ladders, go forward, turn around and head back to the aft part of the ship. (00:35:55)
Continuity mistake: When Rose approaches the stern railing to climb over it casts a very clear moonlight shadow on the deck which is not there in all other shots of this scene. (00:36:35)
Continuity mistake: In the scene where Rose is about to jump off of the ship, she gets to the end of the ship, and she climbs over the railing. At one point she's holding on to the black part of her dress, and it goes onto the long shot and she isn't, then close up she is again and so on and so on. (00:36:40)
Continuity mistake: When Rose attempts suicide she is holding onto the railing while standing on the outside. In some shots the black lace from her dress is held under her left hand, in some it isn't. (00:37:40)
