Morning Departure 1950

AKA Operation Disaster (US title)

Only one camera angle on a portion of a submarine model is used a couple of times in this movie based on a stage play about the sinking of a submarine. The first shot of the model the camera slowly zooms in, the last it slowly zooms out.

   

Hell and High Water 1954

With bucket loads of  cool Cinemascope model sub action, this comic book cold war movie is a fine example of the best quality miniature work from the period.
There is a sequence consisting of the destruction of large fuel tanks  lifted almost entirely from another terrific sub movie "Crash Dive" whose effects were handled by the legendary Fred Sersen. It may be that the miniature sub is the same model as that from Crash Dive as well even though it is supposed to be an ex WW2 Japanese sub in the film.

Ray Kellog, is credited with the special photographic effects and the results are fairly impressive. He became head of the special effects department at 20th Century Fox in 1952 after Fred Sersen.  The miniature atomic explosion that precedes the title and reappears at the end is a spectacular pyrotechnic effect.

There is a model plane and a matte painting which is, I think, supposed to be a B29 but which doesn't look much like one at all.