hen'submerged. The stor- ballast tanks, which include the forward depth gage and air and ballast tanks. (Gontinued on page 410.) and after trimming tanks, a midship Submarine Interior, Looking Aft* Signal Buoy Attached by Wire, Released Stern of a Submarine, Showing the Horizontal Hollow Copper… … Length, 85 feet. Displacement, 250 tons. Speed, 10 knots on surface. Submerges on an even keel. In emergency can release a 5-ton keel and rise to the surface, THE TWIN-SCREW LAKE SUBMARINE.
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