MCSs and CSs of crew members loading helicopter with their equipment, getting in helicopter. MCS of helicopter stationary on ground with rotor blades turning, cut to helicopter airborne. MCSs and CSs of Ches Beachel and the crew using hydrophone equipment. MCS of one member of the crew testing snowy ground with a pole, of him and another member walking toward camera. Cut to Ches Beachel and other man putting earphones on and listening. MCS of helicopter stationary on ground (shot at dusk?). More shots of Bill Mason and other members of the crew talking happily. Shots of two divers walking toward channel of water. Various underwater shots, some showing divers others showing ice-ceiling. Underwater shots of an umbrella jelly fish.