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Sperry's First Triple Flow Steering Systems Installed At NASSCO Sperry Marine Systems has delivered four 24,000,000-inch/ pound steering systems to Na- tional Steel & Shipbuilding Co. (NASSCO) for the 188,500-dwt San Diego-Class tankers. These systems are the first triple flow systems delivered in Sperry's ex- panding steering system business. The triple flow system, which is based upon Sperry's proven dual flow design, utilizes three stages of oil flow to provide smooth rud- der motion. Three rudder servo amplifiers control two directional valves or a dump valve to provide three rudder rates. The valves are operated as a function of the difference between ordered rud- der and actual rudder angle which is rudder error. For rudder errors less than 3 degrees, an oil flow of 90 gpm is provided, giving a rudder rate of approximately 1.2 degrees per second; for rudder errors be- tween 3 and 5 degrees, an oil flow of 147 gpm is provided for a rudder rate of approximately 1.9 degrees per second, and for rudder errors in excess of 5 de- grees, 222 gpm is provided for a rudder rate of approximately 2.9 degrees per second. Sperry Marine Systems is pro- viding a Total Steering System for NASSCO's San Diego-Class tankers, consisting of Sperry's MK-37 Gyrocompass, Dual Gyro- pilot System, Rudder Angle Indi- cating System, Course Recorder, Rate of Turn Indicator and the Triple Flow Clevis Mounted Steer- ing Gear. Sperry Marine Systems, a man- ufacturer of steering systems for over 50 years, can provide Total Steering Systems from 10,000 ft./lbs. rudder torque. For fur- ther information, contact Henry H. Johnston, Assistant Market- ing Manager, Sperry Marine Sys- tems, Worldwide Headquarters, Great Neck, N.Y. 11020. Vernon Morrison Joins SCNO Barge Lines, Inc. Vernon K. Morrison Vernon K. Morrison has joined SCNO Barge Lines, Inc. in the capacity of vice president-sales, it was announced by Frank R. Mark- land, president. Mr. Morrison, a graduate of Duquesne University, has been engaged in river transportation for the past 35 years. "Mr. Morrison's knowledge and experience will be a strengthen- ing asset to our management team," Mr. Markland said. Mr. Morrison will be based in St. Louis at SCNO's general office, 10000 Old Olive Road, St. Louis, Mo. 63141. F & S Offshore Requests Title XI To Finance Four 3,000-HP Vessels F & S Offshore, Inc., 3501 North Causeway Boulevard, Suite 600, Metairie, La. 70002, has ap- plied for a Title XI guarantee to aid in financing the construction of four 3,000-hp oceangoing tow- ing/supply vessels, approximately 180 feet by 40 feet by 14 feet each. These vessels, to be constructed by J. Ray McDermott & Co., Inc., Harvey, La., for an approximate cost of $1,900,000 each, will be used primarily for the carriage of cargo and equipment and tow- age of barges in connection with offshore oil and gas exploration and construction. PROVEN PERFORMANCE Unequalled record of performance . . . Pearlson Engineering is the ONLY company in the world devoted exclusively to the design and supply of shiplift systems. • There are 122 Syncrolifts in 54 countries. • 26 nations' navies use Syncrolifts. More than 150,000 vessels have been docked and transferred by Syncrolifts throughout the world. • Syncrolifts are used for launching newly constructed vessels as well as for ship repair work. sanciUFii DRYDOCKS AND TRANSFER SYSTEMS A Product of PEARLSON ENGINEERING CO. INC. Miami Office: P.O. Box 560008, 8970 S.W. 87th Court Miami, Florida 33156 U.S.A Phone: 305/271-5721 Telex: 051-9340 Cable: SYNCROLIFT London Office: 17 Devonshire St. London W1N 1 FS, U.K. Phone: 323-2855 Telex: 23717 A. DUBAI, UAE: Concrete caissons weigh- ing 4,000 tons launched on Syncrolift.® Assembly line construction in transfer area. B. LAS PALMAS, CANARY ISLANDS: 27,400 DWT vessel, Cobetas, 183 m. long being transferred to parking area from Syncrolift.® C. PUERTO CABELLO, VENEZUELA: 30,500 DWT vessel constructed in two sec- tions on land. Each is launched separately on Syncrolift® and the two sections are welded together in the water. 32 Maritime Reporter/Engineering • News
