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The“Superior” Spur Geared Windlass WE ALSO BUILD Windlasses Steering Gears Capstans Gypseys Winches Hoisting Engines Swinging Engines Power Pawl Posts Dredge Deck Engines Anchor Hoists Scow Winding Gears Drill Frame Hoists Suction Pipe Hoists Stee] and Wooden Derricks Manufacturers of Steam and Electrical Machinery SUPERIOR IRON Designers and Builders —steel passenger ships, freighters, car ferries, self-unloaders, sand suckers, tugs, fire-boats, lighters, dump scows, car floats, barges and dredges. As veteran shipbuilders we are prepared to design and build any of tne above. Our experienced organization and shop equipment insure workmanship that make Manitowoc-built ships outstanding in marine circles. Other marine equipment— Marine engines, boilers, steering engines, mooring wind- lasses, deck and hoisting engines, stee-ing wheels and stands, propeller wheels—any other equipment. ship owners require. Send us your requirements. MANITOWOC SHIPBUILDING CORP. Manitowoc, Wisconsin MANTTOWO@C WORKS COMPANY SUPERIOR, WISCONSIN FATHOMETER VISUAL SOUNDINGS Each flash on the dial gives the depth under your ship at that precise moment. Before your hand can leave the operating button, a continuous sounding operation has begun. Instant by instant as the depth of water under your ship varies, the Fathometer shows the change.” You have constant knowledge of depth without leaving the wheelhouse—YOU SEE THE SOUNDINGS. Yachts, cable ships, submarines, Coast Survey and Coast Guard ships, battleships, and passenger and merchant vessels are using instantaneous, visual, and continuous soundings. Write for Booklet SUBMARINE SIGNAL CORPORATION 160 State Street Boston, Massachusetts, U.S. A. MARINE REVIEW—May, 1928 65