Release Info
Release Dates
| USA | 10 March 1978 | (New York City, New York) |
| France | 22 March 1978 | |
| Hong Kong | 23 March 1978 | |
| USA | April 1978 | |
| Sweden | 10 April 1978 | |
| West Germany | 27 April 1978 | |
| Mexico | 11 May 1978 | |
| Finland | 12 May 1978 | |
| Denmark | 9 June 1978 | |
| Spain | 7 August 1978 | |
| Norway | 29 August 1978 | |
| Netherlands | 31 August 1978 | |
| Colombia | 7 September 1978 | |
| Philippines | 5 February 1981 | (Davao) |
Also Known As (AKA)
| Sauvez le Neptune | Canada (French title), France |
| U-Boot in Not | Austria, West Germany |
| Alerta roja: Neptuno hundido | Spain |
| Fanget i dybet | Denmark |
| Fångade i djupet | Sweden |
| Merten urhot | Finland |
| Mélytengeri vészjelzés | Hungary |
| Pagida sto vytho | Greece (video title) |
| S.O.S. Apo atomiko ypovryhio | Greece (transliterated ISO-LATIN-1 title) |
| S.O.S. Submarino Nuclear | Brazil (video catalogue title) |
| S.O.S. submarino nuclear | Mexico (imdb display title) |
| Salvate il Gray Lady | Italy |
