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April, 1919 THE MARINE REVIEW a CAAA co om (1)—Master Compass. (5)—Switchboard for controlling ship’s electricity and repeat- ers, (2)—Storage Battery for operating equipment if ship’s current fails. (3)—Alarm Bell—for indicating failure of ship’s electricity. (4)—Extra Junction Box for using repeater at after steer- ing position. (6)—Motor Generator for supply- ing alternating and direct current at reduced voltage. (7)—Repeater for Master’s room. (8)—Repeater for Steering Posi- tion. ELEMENTS Sperry Gyro- Compass The eight elements shown in the surrounding illustrations and individually described above, represent a complete Sperry- Compass installation. In providing your ship with this equipment you are decreasing by 75% the danger of loss by stranding because the Sperry Gyro-Compass points to the true North always, regardless of any conditions of the load, weather or locality, being unaffected by any of the magnetic influences that make Navigation inaccurate. You are also increasing the efficiency of operation of your ship, for due to the greater directive force of the Sperry _ Gyro-Compass (32 times as great as the magnetic force) and the absence of any “‘lag’’ the traveled course is straightened out, thus decreasing time between ports and fuel costs. eee es eee ee wwe we oe ee a ee a ee ae There are now in operation approximately 1000 Sperry Gyro- Compasses—in the navies of the United States and other countries—the major part of which have successfully undergone the difficult conditions of war service! Ask Us to Send You Complete Details SPERRY GYROSCOPE CO. BROOKLYN NEW YORK Great Lakes District Office—Guardian Building, Cleveland, O. MON eR TRETRE ST Please mention THE Marine Review when writing to Advertisers