MCS, CS, including ZOOM IN, ZOOM OUT of tractor pulling and moving oil tank on snowy ground, Caterpillar snow tractor helping. CSs of diver preparing oxygen box with chemical, diver being dressed with oxygen equipment, going in water, being monitored on closed circuit TV screen. FOLLOWING SHOTs of diver being pulled out of water by other divers, one of them with note pad in hand, talking to him. Shot of him getting out of water. Several CSs with ZOOM to CS of TV screen, of men watching underwater shots appearing on closed circuit TV screen.