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McDermott Delivers Two Caterpillar-Powered Supply Vessels To Tidewater McDermott Shipyard's New Iberia Division recently delivered two 194-foot supply vessels to Tidewater Marine Service, Inc., a subsidi- ary of Tidewater Inc. The Jan Tide and the Abshire Tide are the seventh and eighth in a series of 10 supply boats being built by Mc- Dermott for Tidewater. The previous six ves- sels were 180 feet long; however, a contract change called for the last four boats to be lengthened 14 feet. The final two are sched- uled for delivery during the first quarter of this year. Jan Tide and Abshire Tide have a 40-foot beam, 14-foot molded depth, and design draft of about 12 feet. Each vessel admeasures less than 300 gross tons, and has below-deck stor- age capacity for 121,000 gallons of fuel oil, 11,000 gallons of potable water, 1,130 barrels of liquid mud or chemicals, and 4,000 cubic feet of bulk materials. Accommodations are provided for 23 personnel. The new supply vessels are certified by the American Bureau of Shipping and the U.S. Coast Guard for service on any of the world's waters. They will be operated under the U.S. flag. Twin Caterpillar D399 diesel engines power the vessels, generating a total of 2,250 bhp at 1,225 rpm. They are linked to Reintjes WAV 1440 reverse/reduction gears having a 4:1 ratio. THE BIRDS & THE BEES ABOUT TUNNEL THRUSTERS Isn't side thrust just as important The key is performance, reliable as fore/aft thrust when docking, operation,easeof installation, low close quarter maneuvering or sta- maintenance and long life—Every- tion keeping? Every skipper who thing that P.S.I. Tunnel Thrusters uses a thruster will agree—there's possess—AND HERE THEY ARE: nothin' like 'em! GEARED MECHANICAL THRUSTERS Three tunnel diamete's ot 36 inch k 48 inch and 56 inch Rated at 20(1300. 30(1400 and 500 600 horsepower Input R PM—dS required from 900 GEARLESS HYDRAULIC MINI-THRUSTERS' Cast steel or aluminum construction Four tunnel dia- meters of 10 inch. 12 inch. 16 inch and 24 inch rated at 15-25 28-36 42-56 69-112 horsepower MODELS ~ FM 36 FM 48 A . ^ FM56 f tJSjte JSP MODELS MT-10 MT-12 MT-16 MT-24 FOR MORE INFORMATION CALL OR WRITE: AlVWfPSI PROPULSION SYSTEMS, INC. 21213 76th Ave So. Kent. WA 98032 TELEX 32-9657 Phone (206) 872-8850 DECK MACHINERY • CP PROPELLERS • THRUSTERS • STEERING GEAR • CONTROLS • SYSTEM ENGINEERING • TRAINING • SERVICE Circle 203 on Reader Service Card Jru. Our Professionally Trained Personnel And Specialized Equipment Will Continue To Serve You With: » Insulation Materials and Installation » Asbestos Control » Marine Services • Custom Fabrication, Including Safety Shields, Removable Insulation Pads and Safety and Cargo Nets » Laminating Facilities for Hullboard » Firesafing and Fireproofing FOR INFORMATION PLEASE CALL: RICHMOND NEWPORT NEWS NORFOLK TOLL FREE IN VIRGINIA (804) 271-0111 (804) 874-8604 (804) 622-0515 800 WACO INC A Release Hook That Doth Hydraulically Opens And Hydraulically Closes . . . For Safe Mooring! WCS Release Hook The new, improved 100 or 150 ton Release Hook from Washington Chain is fully hydraulic offering a controlled operation at all times. The ultimate in safety, the heavy-duty Hooks are unique as no other Release Hook, that both opens and closes hydraulically, is available on the world market today. Washington Chain, the only U.S. manufacturer of Release Hooks, will also produce its 25, 50, 60, 100 and 150 ton Hooks to a customer's specific needs and supply the type of controls desired. All hooks are available in single, double, triple or quad mountings that swing 180° horizontally and 45° vertically with or without capstan. All units are individually proof tested by a 1,000 ton test machine and can be ABS certified if requested. WE ALSO HAVE A COMPLETE STOCK OF MARINE SUPPLIES WASHINGTON Chain & Supply, Inc. 2901 Utah Ave. South P.O. Box 3645, Seattle, WA 98124 CALL TOLL FREE: 1-800-851-3429 1-800-543-1304 (Washington State Only) ILLUSTRATED CATALOGUE AVAILABLE ON REQUEST 88 Circle 202 on Reader Service Card Circle 204 on Reader Service Card Circle 205 on Reader Service Card Join forces with our Simpson marines. Marine Plywood Products Simpson From top to bottom, Marine DecraGuard, Simpson Skid- Guard, Guardian MDO and MarinePly panels all share one important thing in com- mon: each provides an economical, durable, ready- to-use solution for a host of different boatbuilding problems. When the going gets wet, specify tough-to- beat Simpson Marines. For the whole story, write Simpson Timber Company, Panel Products Marketing, Third and Franklin, Shelton,WA 98584.