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Navigation/Communication Equipment Review (continued from page 45) TRIMBLE Trimble Navigation of Moun- tain View, Calif., recently intro- duced a new Loran C navigation instrument, the model 5A. The 5A receiver is said to be a high- quality, reliable, and totally au- tomatic system, so easy to use that anyone can operate it. Push- ing the Lat and Lon buttons pro- vides current position quickly and accurately; Lat/Lon are displayed to a resolution of 0.01 minute (60 feet). The 5A calculates course by the great circle route (shortest distance) from present position, and displays course and distance to destination. The 5A receiver tunes out local interferences with four automatic notch filters. It constantly search- es and electronically adjusts the filters for interferences so there is never a need for operator or internal adjustment of filters when sailing into a new area. The 5A automatically acquires all sta- tions in the Loran chain and se- lects the two LOPs that give the most accurate fix. There is no need to evaluate the various sta- tions and to select the best TDs; the Trimble does all that auto- matically. For further information, Write 53 on Reader Service Card AAT AAT Communications Corpora- tion is a full-service marine elec- tronics company. It provides all manner of equipment types in ad- dition to installation and repair services to workboats, fishing vessels, and deepsea vessels. The firm serves the Port of New York area with its own personnel, and attends vessels in virtually all United States ports with its own technicians or those of similar service-first organizations who perform work in AAT's behalf. The company publishes a news- letter that contains timely regu- latory information as well as new equipment offerings and brief technical articles on marine elec- tronics geared to the vessel op- erators' point of view. AAT of- fices are located in Staten Island, White Plains, and Garden City Park, N.Y., and in Bloomfield, N.J. For further information, Write 54 on Reader Service Card GM-Powered Towboat 'Trotter' Delivered By Hudson Shipbuilders Hudson Shipbuilders, Inc. (HUDSHIP), Pascagoula, Miss., recently delivered the 70-foot tow- boat Trotter (shown above) to Missouri River Barge Lines of St. Louis, Mo. The vessel is HUD- SHTP's standard 70-foot towboat design and represents the yard's continued diversification in the ever-changing marine industry. Trotter is powered by twin GM Detroit Diesel Allison 12V149NA engines, each rated 675 bhp at 1,800 rpm, with Twin Disc 540, 7:1 reduction gears. The auxili- ary power is provided by two Delco generators powered by De- troit Diesel 4-71 engines. She is also equipped with two 40-ton Nabrico barge winches. The pilot house has full all- around visibility and a 27-foot 6-inch eye level. She houses an assortment of electronic equip- ment, which includes one Furuno FR 1011 radar, one Bogen P/A intercom system, one Motorola 55 75 VHF radio with interfer- ence interlock, and one Motorola 55^5 bridge-to-bridge radio. The Trotter will work out of New Orleans and will service the Mississippi River. She is the first of two vessels HUDSHIP is to deliver to Missouri River Barge Lines. The second vessel, the Colt, will be delivered in April this year. Marinette Launches Another Berthing Barge For U.S. Navy Marinette Marine Corporation, Marinette, Wis., recently launched the third in a series of 16 YRBM(L) berthing barges (photo above) under construction for the Naval Sea Systems Command. The YRBM(L) vessels have a 146-foot overall length, 46-foot beam, and 688-long-ton displacement. A to- tal of 257 officers and crew will be accommodated within the ves- sel. Additional features to crew facilities include complete laun- dry services, recreation rooms, classrooms, machine and electri- cal shops, galley and mess areas, and onboard office and store space. Delivery of the third and fourth vessels of the series are sched- uled for June of this year. Mar- inette Marine is a major supplier of defense-related marine equip- ment and of custom-engineered commercial vessels for ocean and inland marine service. Mare Island Naval Shipyard Elects New NCAA Officers The Mare Island Naval Ship- yard Chapter of the Naval Civil- ian Administrators Association recently elected new officers. Pic- tured above from left to right are: Larry Hebert, secretary, who is the director of the Quality As- surance Office; Ted Allen, presi- dent, who is the director of the Management Engineering and Da- ta Processing Office: Capt. E.J. Scheyder, who is the Shipyard Commander; George Stewart, vice president, who is the superintend- ent of the Machinery Group; and Douglas Ghiselin, treasurer, who is the Nuclear Facilities and Equipment manager. The Naval Civilian Administra- tors Association is the national organization of senior level man- agers employed in Navy civil service. The total membership is approximately 600, organized into 13 chapters located in seven na- val shipyards, three naval avia- tion activities, the Naval Ships Engineering Center, the Naval Facilities Engineering Command, the Polaris Missile Facility/Naval Weapons Station, Charleston. Be- cause of the positions held by the members, they exercise responsi- bility over many thousands of engineers, scientists, administra- tors, and other employees in- volved in the activities in which they are located. The purpose of the organization is to contribute to the improvement of manage- ment of the Department of the Navy. 46 Maritime Reporter/Engineering News
