American Navy training men to serve on board submarines.
Titles read: "Submarine School in USA".
United States of America (USA).
Various shots of American Navy recruits in a classroom learning Morse code. L/S of large metal diving tower. Various shots of men in swimsuits being submerged in special chamber in large tank of water. Various underwater shots of men pulling themselves out of chamber and up to the surface using a knotted line. Each man wears "the Momsen lung", a piece of diving apparatus.
Various shots of men getting on training submarine in harbour. Various shots of submarine going out to sea and submerging. Various aerial shot of a fleet of submarines.