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HEAVY LIFT SPECIALIST WRECK REMOVAL BISSO MARINE SINCE 1890 P.O. BOX 4113 NEW ORLEANS, LOUISIANA 70178 (504)866-6341 EAX:(504)865-8132 IELEX: 5106009674 (BISSO MARINE) PLATFORM REMOVAL SALVAGE DERRICKS: CAPPY BISSO, LILI BISSO, AJAX, CAIRO, SALVAGING A 1,400 TON LINE BOAT Circle 318 on Reader Service Card Technological advances. Flawless design. Exceptional quality. Over 35 years of experience. Built in the U.S.A. tor the Police, Navy, Coast Guard, Rescue Missions, Safety Organizations and Off-shore Oil companies. All combined make Willard Marine the country's largest Established 1956 manufacturer of Rigid Inflatable Boats. WILLARD MARINE, INC., 1250 N. Grove Street, Anaheim, CA 92806-2114, USA. Phone 714/666-2150. Fax 714/632-8136. __ Circle 308 on Reader Service Card cJo MAN B&W's Alpha Series: Power In A Compact, Resiliently-Mounted Design jri JB 5 hi ! '' M «£ UJ | ji p MAN B&W's compact, low-noise Alpha engine design. A recent test of the vibrational levels of MAf> B&W's Alpha series of engines reportedly indi cated a need for only 35 to 40 percent dampening as opposed to some engines' requirements of 90 tc 95 percent. The Alpha series is designed to be compact, sturdy and well-balanced, keeping vibra- tion induced by the combustion process to a mini- mum. For the in-line 23/30A engine series, re- ported vibration levels of 6-10 mm/s can be ex- pected. The Alpha series engines are fitted with resilientmountings. In order to meet the moderate demands of ships with main engines below 1,500 kW in an economically sound, competitive way, MAN B&W performed testbed tests of a resilient mounting for its L23/30A(800 -1,280 kW). The mounting retained compactness, short installa- tion length, easy alignment and installation, and accordingtoMANB&W, costs 75 percent less than the conventional solution—mounting the engine on a self-supporting frame. The new flexible element was given a rather high degree of stiff- ness. There was a consequent loss of dampening, but that was easily made up by the engine's low vibrational level. The flexible elements were bolted to brackets mounted on the engine foundation feet. Measure- ments on testbed with simulating 1.5 times maxi- mum propeller thrust showed a relative dampen- ing of 35 to 40 percent. The dynamic deflections were kept down to plus or minus. 1 mm vertically, and due to the propeller thrust, .5 mm longitudinally. For more information from MAN B&W, Circle 131 on Reader Service Card Zidell Launches Brix-Owned Barge Zidell Marine Corporation launched the BMC 26, a 270-foot by 42- foot by 16.5-foot well barge, at its Portland, Ore. location. The barge was purchased by Brix Maritime Company, to haul cargo on the Columbia River System. Tidewater Elects Three Vice Presidents Tidewater Inc. announced its board of directors promoted three marine executives. Elected vice presidents of Tidewater Inc. were John P. (Pe- ter) Laborde, Jr., Van C. DeWitt, and Peter F. Fortier. Tidewater Inc. owns and operates the largest fleet of marine vessels servicing the inter- national offshore energy industry and owns and operates one of the largest fleets ofnatural gas and air compressors in the U.S. 28 Maritime Reporter/Engineering News
