According to legendary SFX technician L.B. Abbott, this film used some out-take footage of the model of the S.S. Queen Mary used in The Poseidon Adventure (1972). In this TV-movie the scene is where the ship is listing to one side and then begins to right itself. This was actually a rejected special effects scene because the miniature wave that was supposed to capsize the model in "Poseidon" was too small and had to be re-shot. Luckily that 'bad footage' was saved and came in handy for this TV-movie. Also, every scene of the ship at sea was footage from "Poseidon Adventure" (mostly establishing shots) since the original model of the Queen Mary was no longer available for filming.
Actors David Hedison and Burr DeBenning did some of their own underwater stunts in this film. They both performance similar work in previous Irwin Allen productions: Hedison in "Voyage to the Bottom of the Sea", and De Benning in "City Beneath the Sea".
This TV-movie was filmed by Irwin Allen's second unit team in the fall of 1974, while his first unit team was busy with post-production chores on getting The Towering Inferno (1974) ready for it's Christmas, 1974 release date.