I have to say I found this a pretty interesting documentary. A modern movie would have a whole team recording behind the scenes footage for documentary use, but it's quite rare to see something with so much footage of the making of a movie in the 50s.
I'd never really considered that the movie had been such a big production for its time, though with hindsight it should have been obvious that it was... the documentary makes that more obvious, with all the different ships they had to use to simulate the Titanic, various models, partial replicas of sections of the ship, etc.
If you buy the DVD of the movie, it's almost certainly worth your time to take an hour and watch this documentary on the other side.
I'd never really considered that the movie had been such a big production for its time, though with hindsight it should have been obvious that it was... the documentary makes that more obvious, with all the different ships they had to use to simulate the Titanic, various models, partial replicas of sections of the ship, etc.
If you buy the DVD of the movie, it's almost certainly worth your time to take an hour and watch this documentary on the other side.