Page:Popular Science Monthly Volume 91.djvu/397

 What the "Mother" of a Submarine Flotilla Looks Like

���The mother-ship of a submarine flotilla must discharge manifold duties. She is responsible for the supplying and the repairing of six submarines, keeping them in prime condition for active service. In her central testing dock, she must periodically subject each submarine to tremendous pressures so that disasters from weakened hulls are averted. In brief, she must act as a mobile naval base— a base which can furthermore salvage any sunken submarine within reach of her divers

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