Air shot of Toulon submarine 'Minerve' which has got lost in Mediterranean Sea. Air shot of French warships searching around the Mediterranean for the submarine, including aircraft carrier "Clemenceau". MV. Radar aerials on carrier. Various shots of the helicopters lifting off...
A one-man submarine is tried out on a lake.
Submarine 'Sunfish' rests in port after successful actions under command of Lieutenant Colvin.
British submarines visit Lisbon harbour; their Commander goes ashore.
Sailors go through training to become members of the Submarine Corps.
Cuts (out takes, rushes) for SALVAGE ATTEMPT FAILS in G 1310.
Men practising escape from 'A' class submarine.
Testing submarine by inventor Vassena.
Footage of miniature sub.