Inventor tests 'one-man' submarine.
Gen. view wheeling baby sub. past camera.
Back view submarine into water.
Semi CU & CU intr. of sub.
Long view man gets into sub.
CU man in sub.
Semi view closing down lid of sub.
CU pan sub. starts off.
Side view sub. towards camera partly submerged.
Side view sub. submerging.
Semi view sub. submerged & comes up.
Ships and Boats; Inventions; United States of America
Background: Inventor tests 'one-man' submarine.