Unique and innovative underwater camera equipment was developed for this movie by 2nd unit cameraman and cinematographer 'John M Stephens', a former U.S.A. Navy diver, who is billed in the credits for additional arctic photography. The camera system enabled the first ever filming of a continuous submarine dive and this technical innovation produced some outstanding photography for the picture. This achievement was encapsulated in an accompanying MGM short promo film The Man Who Makes the Difference (1968) which is available on the DVD for this movie.

Film

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