At different times while the wireless operator is sending his distress message, the wireless radio is made to have two distinctly different sounds. The radio transmitters aboard ships in that era were spark gap transmitters. Most times the sound that is used could pass for the sound that those transmitters would make. But at other times you hear the clicks that early telegraph sent over wires would make. That sound is more appropriate in old western movies.
During the final moments a steward is seen comforting a child as the crowd moves aft. He is heard to say "Keep off this child! Keep off this child!" However, he is actually seen speaking to the child before, during, and after this dialogue and his mouth is not saying the words that are heard.
The transcription of the ice warning keeps changing: when it is being written the last two letters of the word ICEBERGS project outside the border of the printed box on the wireless form. A few seconds later, as the purser lays down a new bundle of messages to be transmitted, the letters ERGS are outside the border. When the wireless operator spikes the used forms, the word is contained entirely within the box. A few minutes later there is another view of the spiked forms and it is back to the last two letters of the word being outside the box (i.e. the one we actually saw being written.)
In the first establishing shot of the Californian, where the bows are pointing camera left, the ship's name is seen backwards. Later we see the same shot, this time with the bows pointing camera right and the name seen correctly. Evidently the first shot was flopped to match the next shot on the bridge, where the crew are looking camera left.
About 14 minutes into the movie, what looks like a full-size sun reflector on a big stand, is seen sitting unused, dead-center, in the background for 3-5 seconds as the steerage passengers say good-bye to friends and a priest near their homes.
Captain Lord of the Californian makes reference to the Californian's passengers being "in no hurry - they wouldn't be with us if they were." Although the Californian was capable of carrying both passengers and cargo, they did not have any passengers on board at the time.
While the crewmen and Ismay are uncovering and hoisting out the boats, a rocket goes up. It would be about 12:15 or so. The first rocket didn't go up until 12:45, 30 minutes later. (The first boat, No.7, also was lowered at this time)
Lightoller is loading boat 4 when a boy of 13 comes up. Lightoller at first refuses permission to enter the boat. Then a man convinces him. However, boat number 4 was lowered to A-Deck, and the event with the boy happened there. In the movie, it was on the boat deck.
In the movie the Titanic is launched by an eminent lady smashing a bottle against the side of the ship in front of a public crowd and announcing "I hereby name this ship the Titanic". In reality this never happened as the owners, the White Star Line never christened their ships. The ship set out on its maiden voyage without any such ceremony taking place, although many people were there simply cheering it on.
In the shots of the Titanic underway at sea, we see smoke coming from all four smoke stacks. Only the first three were operational on the Titanic; the fourth was not a smoke stack but was used as a vent for the kitchen and engine rooms.
The rudder on the real Titanic was straight during the whole sinking, but in the movie the rudder goes from left to straight to left again. 1:28:27-1:28:51, the rudder is turned to the left. 1:37:22-1:37:24, 1:43:02-1:43:04, the rudder is still turned to the left. 1:43:08-1:43:11, the rudder is straight. 1:47:26-1:47:28, the rudder is turned to the left.
One of the last lifeboats being lowered is noted to have only 12 persons in it; this was only true of the very first lifeboat. The danger wasn't taken seriously at first and passengers were reluctant to board, thinking that it was safer to remain on the Titanic.
As with most pictures about the Titanic, filmed before the discovery of the wreck in 1985, A Night to Remember portrays the Titanic as sinking in one piece. The discovery of the wreck revealed that the ship had broken in two and most films about the ship, Titanic (1996), and Titanic (1997), have reflected this point. Although scholars debate to this day whether the break up happened while the ship was above the water line or while it was under the water, and out of the view of survivors, plunging towards the ocean floor. Eyewitness testimony to the sinking diverge in opinion about this fact meaning that A Night to Remember's portrayal of the ship sinking intact, while above the water line, may still be accurate.
In the final scene when Lightoller and Captain Rostron are on the deck of the Carpathia, the horizon in the background is moving up and down to indicate the rocking motion of the ship. However the angle of the shadow cast on their faces by the rope in front of them does not move.
Toward the end when Mr. Lightoller climbs on the overturned lifeboat and helps others on the boat it doesn't move. Any floating boat would have but this was obviously fixed on a pedestal for filming purposes.