Page 40: of Maritime Reporter Magazine (May 1969)

Designer And Builder Describe MAR II Powerplant To Philadelphia Section Taking part in the recent Philadelphia Section, SNAME meeting were, left to right: Samuel S. Morse, E. Fortino, R. G. Donaghy, A. C. Brown, M. Hsrton, A. D. Haff, D. S. Fentiman, and George A. Johnson. The Philadelphia Section of The Society of Naval Architects and Marine Engineers held its March meeting at the Engineer's Club of Philadelphia. Donald S. Fentiman, project manager, MAR II Floating Pow-er Plant, General Electric Co.. Schnectady, N.Y. and A. Dudley Haff, technical manager, Central Technical Division, Bethlehem Steel Corp., Sparrows Point. Md.. co-authors, presented their paper "Gas Turbine Floating Power Plant." George A. Johnson, chief. Marine Design Division. U.S. Army Corps of Engineers. Phila-delphia, Pa., was coordinator for the meeting. The paper discussed: The MAR II floating powerplant, a unique combination gas-turbine and diesel-engine powerplant which was de-signed and constructed to furnish 20-mw of precise electrical power for the Nike-X anti-ballistic mis-Edo Western Navtrak? A New Doppler Sonar Navigation System The Edo Western Corporation has developed a new pulsed doppler sonar navigation system which util-izes the doppler principle to pro-vide real-time, true speed and true distance over-the-bottom informa-tion for accurate navigation, map-ping, surveying, and exploration. This system is completely inde-pendent of land-based stations, weather conditions, visibility, or sky wave effects. The versatility and accuracy of the Model 435 'Navtrak' Pulsed Doppler Sonar Navigation System make it one of the most unique navigation, sur-veying and exploration systems available for present day use. The Model 435 has an operating depth capability in excess of 600 feet and is accurate to better than 0.5 percent. This accuracy and depth capability will normally suf-fice for all types of exploratory sile test program on Kwagalein Atoll. The paper describes the cri-teria established for this plant by the Corps of Engineers, the power generation equipment selected to meet the performance requirements and the special design and con-struction considerations in convert-ing a World War II floating dry-dock section into a modern self-contained powerplant. Formal discussions were pre-sented by : Ernie Fortino, assistant chief. Marine Design Division. U.S. Army Corps of Engineers. Philadelphia. Pa.; A. C. Brown, manager, J. J. Henry Inc.. Phila-delphia office; ^al Horton, senior engineer. General Electric Co., Schenectady. N.Y.: Richard Don-aghy, chief. Research Power Lab-oratory, U.S. Army Corps of En-gineers, Washington. D.C., and Samuel S. Morse, naval architect. Atlantic Richfield Co. surveys and operations along the Continental Shelf. Also, by operat-ing off of volume scatterers. open ocean navigation with minimal cor-rection for currents can be achieved. A nominal carrier frequency of 150 kHz is utilized and has been adapted to insure that satisfactory operation is obtained from all pos-sible types of sea floors, to depths in excess of 600 feet. The directive beam widths are less than five de-grees, and are directed downward 60 degrees from the horizontal. The transducer array is formed with the use of one assembly to minimize installation errors nor-mally present in separate array systems. By using pulsed doppler sonar, the Model 435 has common receiving and transmitting sections which allow inter-changeability be-tween fore-aft and port-starboard channel modules, thus simplifying maintenance and reducing logistics problems. For further information contact Edo Western Corporation. 2645 South 2nd West, Salt Lake City. Utah 84115. Capt. Garrett Joins Harbridge House Capt. Wallace H. Garrett Capt. Wallace H. Garrett, USN (ret.), has joined the staff of Har-bridge House, I nc.. Boston, Mass., an international management con-sulting firm. Captain Garrett will have responsibility for integrated consulting services in the fields of shipbuilding and ship repair. Prior to joining Harbridge House. Captain Garrett was project man-ager for two major Navy programs. Most recently, as DX/DXG project manager in the Naval Ship Sys-tems Command, he planned, organ-ized, and directed the 4-billion-dollar destroyer fleet replacement program from initial conceptual-ization through initial contract awards. In recognition of his ac-complishments in successfully man-aging this program. Captain Gar-rett was awarded the Navy Legion of Merit. Previously, as project manager for anti-submarine warfare ships. Captain Garrett had overall re-sponsibility for the construction of 60 ships being built in 14 separate shipyards, both Navy and commer-cial, and supervised the mainte-nance and conversion of approxi-mately 300 ships. In the course of his notable car-eer in the fields of shipbuilding and ship repair management. Captain Garrett has held the positions of as-sistant planning and estimating su-perintendent at the Philadelphia Naval Shipyard, senior assistant supervisor of shipbuilding at Bath, Maine, and shipbuilding and repair superintendent at Puget Sound Naval Shipyard. His innovation of sophisticated management methods resulted in significant dollar sav-ings for the Navy and many of the techniques he pioneered have been adopted as standard procedures in shipbuilding and management. Cpon graduation from the United States Naval Academy in 1941, Captain Garrett was assigned to a destroyer operating in the South Pacific Theatre. Just prior to the end of World War II. he was sent to the Massachusetts Institute of Technology where he earned a MS in naval architecture and marine engineering. Atlantic-Richfield Requests Bids From Several U.S. Shipyards Atlantic-Richfield Co. has re-quested several U.S. shipyards to submit prices by June 14 for the construction of three or five tank-ers in the 100,000/120,000-dwt range. The three-shio procurement calls for delivery of one ship each in 1972, 1973, and 1974. The five-ship procurement calls for delivery of two ships in 1972. one in 1973 and two in 1974. When completed, the vessels will be used to haul Alaskan crude oil to West Coast refineries. Sermon's To Build Five Twin-Screw Trawlers Sermon's Boat Yard, Tarpon Springs, Fla., is to build five twin-screw trawlers for undisclosed in-terests. Two of the trawlers will be 78 feet long, one will be 72 feet long, one 88 feet long, and one 106 feet long. Each Of Four New Willis Cargo Barges Have A Cargo Volume Of 82,800 Cubic Feet One of four extra-long covered hopper barges, built for C. G. Willis, Inc., of Paulsboro, N.J., splashes into the Ohio River from the marine ways of Dravo Corporation, Pitts-burgh, Pa. The 221 -by-35-by-l 2-foot barges will be moved to New Orleans and then token up the East Coast by tugboat to the Philadelphia area. Each of the barges has a cargo volume of 82,800 cubic feet. The Willis firm moves a variety of dry-bulk cargoes on the Intracoastal waterway between Philadelphia and Jacksonville, Fla. 42 Maritime Reporter/Engineering News