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CORE 85 (continued) Harvey Offshore Services Ltd. Helly Hansen Limited Household Movers & Shippers Husky Bow Valley Imperial Eastman Ltd. Imperial Tobacco Ingersoll-Rand Canada Inc. Int'l Paints (Canada) Ltd. Justram Equipment Inc. Kelly Real Estate Ltd. Krupp Mak Canada Inc Lackie-Apex Lavalin Inc. Liebherr-Werk Nenzing GMBH Lips N V Canada Livingston International Inc. Lyons Machinery Co. Ltd. Maclean Industrial Supply Co. The Maloney Companies Manitowoc Engineering Co. Chamber of Commerce. Marseille Maritime Command Headquarters Marine Equipment Ltd. Marine Industry & Technical Marystown Shipyard Ltd. Maritime Telegraph & Telephone Masoneilan Operations MBB Helicopters Corporation McElhanney Services Ltd. Mesotech Systems Ltd. Metcon Container Products Ltd. Ministry of International Mobil Oil Monenco Offshore Limited Moore Instruments Ltd. Morris International Trading Motorola Canada Limited MSE Engineering Systems Mulgrave Industrial Commission Mulgrave Machine Works Ltd. Narwahl Marine National Research Council CDA. Newfoundland Ocean Industry Government of Newfoundland NL Industries North Atlantic Contractors Norton Canada Inc. Novatron Nova Scotia Research Government of Nova Scotia N. S. Ind'l & Marine Power Oceanic Canada Ocean Resources Magazine Ocean Transit Case Co. Offshore Engineer Offshore Oil International Offshore Resources Offshore Trade Assoc. of N. S. Oilweek Okanagan Helicopters Old Orchard Inn OMNITHRUSTER® Thrust Is Forwards And Sideways And Backwards 360° Maneuvering, Slow-Speed Propulsion, Ice Management! Air/Water Hull Lubrication Waterfall Deluge Hull Lubrication Ice Dispersal Heeling Tank Transfer Ballasting/Deballasting and with the same thruster elements... Side Thrusting — Even Underway Emergency Propulsion and Steering No Protrusions... No Hull Change Low-Drag Nozzles — Saving Fuel No Reversing Impeller Sound Masking Micro processor Control System, Model 1200A with gyro input . . . holds vessel's heading. System also accepts compatible NAV/AIDS fore aft and slow-speed propulsion and positioning. MODULAR THRUSTER SYSTEM . . . OMNITHRUSTER ship control systems* utilize individual module thrusters of up to 3000 HP in any combination to produce desired forward or lateral net thrust. Prime movers for the Modular Thruster System may be electric, hydraulic or diesel powered in conjunction with manual/automatic or integrated control networks. ADVANTAGES FOR LARGE VESSELS . .. • Incremental Thrust Capability • Multiple Module Reliability • Easily Retrofitted or Installed in New Construction • Minimum Maintenance • 'Naval Architects: Robert Allan, Ltd., for Gulf Canada Resources, Inc. OMNITHRUSTER INC. PV/JT1100, 1000HP MODULE THRUSTER *Covered by U.'S. Patents; Foreign Patents Pending 9515 Sorensen Avenue, Dept. 31-15 Santa Fe Springs, California 90670 213/802-1818 Telex 194265 OMNI SFES Cable Address Omnithrust Circle 197 on Reader Service Card Space saving physical/ chemical design requires 90% less space than biological systems. Low installation costs Simple, automatic operation Low operating and maintenance costs Reliable micro- processor control Quick delivery... 6 standard models Model ORCA 11-24 Model II-12 11-24 11-36 11-165 11-330 11-500 Number people served 12 24 36 165 330 500 'If low volume flush toilets are used, the number of people can be doubled. USCG certified and IMO approved Call or telex Dick Lambert for technical information, brochures or a quotation on a specific model. ENVIROVAC INC. SSffiiaaA. Telephone 815/654-8300, Telex 257-415 (ENVIROVAC RKD) Toll Free (USA only) 800-435-6951 (except in IL, HI, AK) Circle 327 on Reader Service Card REDUCE OPERATING COSTS Pacific Marine Services has developed cost reducing underwater techniques and services for all ships. UNDERWATER PROPELLER POLISHING • Skilled Technicians • Detailed propeller condition report • Service to ship's schedule CLOSE-UP INTERNAL TANK INSPECTION • Project management as needed • Trained inspector divers/inspection engineers • Gauging simultaneously recorded on video record • Performed during bunkering or at sea Full range of diving services 24-hour service PACIFIC MARINE SERVICES P.O. BOX 3400 TERMINAL ISLAND, CALIFORNIA 90731-04I3 (213) 832-4281 TLX 315872 Call or write for info Omron Canada Inc. Government of Ontario Otis Engineering Palco Welding Products CDA Ltd Peabody Engineering Canada P.E.I. Development Agency Petro Canada Philips Electronics Polestar Communication Ltd. Porta-Test Systems Purolator Courier Government of Quebec R D Instruments Dept. of Regional Industrial Revenue Canada Rivtow Industries Ltd. Romor Equipment Limited Royal Bank of Canada Sagadore Cranes & Equipment Sandvik Canada Corporation Scotia Sprinklers Seaboard GM Diesel Ltd. Seametrix Inc. Seakem Oceanography Ltd. Seimac Limited Shell Canada Siemens Electric Limited S.I.I. McEvoy Canada Smith Tool Canada The SNC Group Solar Oil Tools Sonics Exploration Ltd., Steel Plate & Sections Ltd Stone & Webster Canada Ltd Strait of Canso Industrial Strider-Resource Agencies Strathclyde Regional Council Subsea Technologies Ltd. Survival Systems Ltd. Taurus Hungarian Rubber Works Taylor Instrument Telecom Canada Texaco Canada Inc. T K Valve [Canada] Ltd Totran Services Touche Ross Transport Canada TRW Canada Ltd. T. Thompson Ltd. Twin Cities Importers & Dist Ulstein Maritime UMACS of Canada Inc. UNI Diesel Unified Systems Ltd. Vam Premium Connections Verreault Navigation Inc. Vickers S.Y.S. Inc. Welding Institute of Canada West Coast Manly Shipyard Western Rock Bit Co. Ltd. WHICO Atlas Co., Wilron Eastern Ltd Windsor-West Hants Area Wire Rope Industries Limited W. L. Gore & Associates Inc. W. N. White & Co. Ltd. Wolf Sub Ocean Ltd. Woodside Fabricators Ltd. Government of Yukon For further information con- tact: James E. Myles, show manager, or Christine Sa- marin, show & conference coordinator, Canadian Offshore Resources Exposition, 20 Eiut- terick Road, Toronto, Ontario, Canada M8W 3Z8; telephone (416) 252-7791. 10 Circle 101 on Reader Service Card Maritime Reporter/Engineering News