Continuity mistake: When the submarines are down at the wreck they are shown looking at the enclosed promenades at the bow of the ship. When the camera backs up in one scene to reveal more of the ship there is a pole that is broken. Then in the next shot you see the same area, with the same pole intact. Apparently because both subs are seen during the broken pole, that was not the real Titanic, while the unbroken was. (00:03:00)
Continuity mistake: At the beginning of the film, when Brock is being taped in the submersible, the sub is already underwater. Only seconds later, if you look out the circular window, it's the reflective tops of the waves. Did they just rise up to the surface suddenly? (00:03:20)
Continuity mistake: In the beginning, when the safe is being opened, there's a close-up of the grinding wheel digging into the metal. In the next shot the crewman who does the job is only kneeling down, while the grinding sound is already there. (00:09:00)
Continuity mistake: At the very beginning of the film when Brock is talking with the big guy, they walk up stairs turn to the right, and right in front of them is a large piece of the ship with a no smoking sign on it, yet in the following shot, the large piece has turned into a very small piece, not even enough room for the sticker. (00:13:35)
Continuity mistake: When the old Rose arrives on the Keldish, she is unloaded from the helicopter sitting in her wheelchair. The two pilots are helping from above, but afterwards they disappear inside the helicopter from one shot to the next, which is too fast as the rotor noise suggests continuity. (00:14:20)
Continuity mistake: Rose steps out of the car, sees the Titanic and says "It's as big as the Mauretania" while she holds her hat. A frame later, from a different angle, her arm is down. (00:21:00)
Continuity mistake: When we see Rose at the start she says she doesn't know what all the fuss is about. As she says this she has her hand on her hat, but after the angle changes it isn't. (00:21:15)
Continuity mistake: After Rose sees the Titanic, Cal replies "it's 100 feet longer than the Mauretania", with nobody behind him. Right then the angle changes and his chauffeur appears. (00:21:20)
Suggested correction: Lovejoy is seen further back. When Cal says its 100ft longer, he turns to help Ruth out of the car and Lovejoy is still further back. However due to the new angle, he appears closer.
Continuity mistake: Look closely at the location of Rose's beauty-mark the first time you see her at the dock. It is on the opposite side of her face during the rest of the movie. (00:21:30)
Continuity mistake: Cal checks his pocket watch when getting ready to board the Titanic. In one shot he has his walking stick raised. In the next shot it has vanished completely. (00:21:50)
Continuity mistake: Ruth walks to the ship, followed by Rose and Cal. When she is about to enter, the angle cuts and suddenly several women with dogs haven taken her place, followed by a lady who looks nothing like Ruth. Then in the following close-angle the group is meters behind from where they first were, repeating the walk towards the door. (00:22:15)
Continuity mistake: Before winning the poker game, right when we meet Jack, his cigarette swaps from worn out and dirty to perfect and spotless. (00:23:10)
Continuity mistake: When the ship is about to leave the dock, there's a lot of people saying goodbye to the ones that are going to leave the city. In the following shots, you can see Jack and his friends playing cards inside the pub. If you look through the window you won't see anyone. In the next shot, when Jack leaves the pub, the crowd is there again. (00:23:15 - 00:25:05)
Continuity mistake: When Rose has just boarded titanic and is looking through her "finger" paintings, she is holding a painting, then slides it down her fingers. When she slides it down, she slides it almost to the end of the painting's frame, but in the following shot she isn't even close to the edge/end of the painting. (00:27:45)
Continuity mistake: At the beginning of the film when Cal sees Rose putting her paintings up, if you watch closely in the background, in one shot Cal walks into the room with his glass at his side, in the following shot it is at stomach level. (00:27:50)
Continuity mistake: The pipe on the starboard side of the forward smokestack changes by the time the ship sinks. When Captain Smith tells Murdoch to speed up the ship it bends at the top and creates a half circle. When it is collapsing behind Cal, it has the shape of a "P." (00:28:20 - 02:28:00)
Continuity mistake: When Captain Smith says to Mr. Murdoch "let's stretch her legs" the light comes from the port side. When Murdoch enters the bridge the light comes from starboard. (00:29:00)
Continuity mistake: While with Fabrizio on the front of the boat, Jack's hair moves wildly, yet a frame later, from a different angle it's still. (00:29:50)
Continuity mistake: When we see Jack and Fabrizo at the front of the ship, in one shot we see the wind blowing Jack's hair and jacket. In the next shot it's not. (00:29:50)
Continuity mistake: At the beginning when Jack and Fabrizio go to the front of the ship, you can see the anchor section at the front, yet when Jack is waiting for Rose, the camera pans up, and its a completely different design, than from the first look at the beginning. (00:30:10 - 01:17:10)