A small seaplane encounters trouble when it hits bad weather when it flies off from a small island in the pacific. The cockpit catches fire with faulty electrics, the radio does not work properly, the navigator dies because of the fumes emitted from the wrong type of fire extinguisher.
Running low on fuel the plane lands near a small deserted island. The passengers swim ashore only to realise they are in imminent danger as the island is a testing site for a nuclear bomb.
SOS Pacific is a British B disaster film with a motley flying crew of owner-pilot Jack Bennett (John Gregson) who unravels because he has cut corners. The disgruntled navigator Willy (Cec Linder) who hates his job. Pretty flight attendant Teresa (Pier Angeli.)
The six passengers include an old policeman who gets air sick, Petersen (Clifford Evans) carrying a prisoner Mark (Eddie Constantine) a tough sailor who is charged with smuggling. Whitey (Richard Attenborough) a small time snivelling crook who has snitched against Mark. Dr Strauss, a German scientist on his way to a teaching job, snooty Miss Shaw and Maria, a good time party girl.
It is all rather formulaic, we just know Petersen will be the only one to man up under pressure and the pretty ladies will fall for him. Whitey will buckle under pressure and become villainous. Not sure why the policeman put him and Mark on the same plane.