Up and down we go
Jack asks Rose to board a lifeboat as the ship falls, and they struggle to get to the upper deck. She agrees to sit in one of these boats because he is so persistent about it, but she later changes her mind when she notices Jack on the deck and realizes she might not see him again.
It appears that the boat dropped roughly ten feet from its starting point when they lowered it. Subsequently, the camera captures Jack and Cal conversing for almost forty seconds. The next time we see Rose in the boat, she’s only around five feet down, despite the fact that the crew kept lowering the vessel while they conversed. That is illogical!
