Samoan Clipper was one of ten Pan American Airways Sikorsky S-42 flying boats .

On 16 July 1983 a British Airways Helicopters commercial Sikorsky S-61 helicopter , `` Oscar November '' ( G-BEON ) , crashed Catastrophe in the southern Celtic Sea , in the Atlantic Ocean , when en route Sending from Penzance to St Mary 's , Isles of Scilly in poor visibility .