ET on National Geographic, and streams the next day on Hulu.
The tests starts with Jack and Rose both on the door.
They can do it, but their combined weight keeps them immersed in frigid water.

James Cameron’s “Titanic”
It would have required knowledge of the circumstances and some strength.
Out of the water, [his bodys] violent shaking was helping him, Cameron said.
Projecting it out, he couldve made it pretty long.

The final test involves a scene not in the film involving a life jacket.
They also have Jack and Rose perform a series of strenuous exercises.
Hes stabilized, Cameron says.
Jack mightve lived, but theres a lot of variables.
Kate Winslet weighed inon the testing as well.
She isnt buying survival.
So, you heard it here for the first time.
Yes, he could have fit on that door, but it would not have stayed afloat.