You must name the mistakes, so here they are,
the Grand Staircase is made incorrectely, the telegraphs in the bridge are nothing like the original, Titanic never had alarms, the lifeboat davits aren't accurate, also the lifeboats, the remaining passengers never sang the last song played, Titanic never had a list to port or starboard, in one of the lifeboat scenes, the b-deck opened went in between black and white, not white and white, there were no explosions on Titanic, the dining hall for first class wasn't two stories tall (like in Raise the Titanic, it was the Grand Staircase top stair), and in the end, the 20th lifeboat was missing, it said 19 and in the 1997, all 20 survived (20t was upside down but was able to row to Carpathia.