All of the footage at the beginning of the movie featuring a large ocean liner striking an iceberg and sinking is all stock footage from the famed 1958, British Titanic film, A Night to Remember.
The dam bursting scene is footage taken from the Dirk Bogarde film Campbell's Kingdom. Bogarde is in the green checked shirt and Stanley Baker in the red shirt, both are recognizable in this footage.
The last feature of Howard Marion-Crawford