Also comment from later on- when you mentioned the women who were on Gracie's arm. One of them, the blonde woman, in a continuity error, is seen in Molly Brown's boat in a later scene. Also when asked if Cameron said about extras being certain characters. He did tell some extras their characters/names.

hi. friend of fitz. i took into consideration of his reserch. and after a look at the wreck provided by the final word. I too saw a zig zag motion within the trail left by the bow. along with one isolated area in the middle of the trail where theres a big bunch of debris. this as stumped me for the past couple of months. but i have a theory for this zig zag. as the ship finally separates by an implosion/explosion, the bow is pushed in a wonky position and direction, this would cause the bow to move down and list to port and starboard. kinda like a skateboard.

I find the funnel interesting. Did the funnel had fallen with the ship was lower in the water, because the ship seems higher out the water for water pressure in the film. And wouldn't have the funnel fallen in a different direction due to the angle it was at to begin with. I mean if the cables snapped wouldn't it have fallen sideways or backwards instead of forward?