Divers and men in boats investigate why 400lbs of explosives failed to destroy a sunken cruiser.
Item title reads - The Big Bang that Failed. 400lbs of explosives fail to destroy sunken cruiser "Ariadne" with its 400 mines. Off Eastbourne, East Sussex.
C/U of a buoy, various shots of men in a rowing boat which is bobbing about on the water, one diver climbs into the sea. Various shots of men in boats.