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Caterpillar Announces Two Improved Diesels —Free Brochure Available At the recent Fish Expo in Boston, Caterpillar Tractor Com- pany's Engine Division announced two improved models in its ma- rine diesel engine line. One is a new, direct-injection configura- of the well-accepted turbocharged and aftercooled 3412 marine en- gine. The direct-injection 3412 DITA version is said to offer some 8-10 percent increased fuel efficiency compared with the pre- combustion chamber 3412 model. Higher torque rise, greater op- erating range, and reduced heat rejection are also features of this new configuration. Approved rat- ings include 520 bhp (388 kw) continuous and 625 bhp (466 kw) medium-duty commercial at 1,800 rpm. The matched Cat 7221 and 7231 marine transmissions are offered for the continuous rating, with the 7231 offered for the medium-duty commercial rating. The 3412 DITA is designed pri- marily for medium to large fish- boats (75-95 feet), inland tow- boats, and offshore utility vessels. With its attractive fuel economy, fishboat owners wanting higher horsepower will find the 3412 DITA and matching marine trans- mission a logical choice. The second improved model an- nounced by Caterpillar is the tur- bocharged 3208 T diesel, which is replacing the current version 3208. Significant component im- provements are said to be engi- neered into the compact, light- weight V8 diesel to extend its application to all levels of com- mercial propulsion service. Rat- ings for the 3208 T include 260 bhp at 2,800 rpm for light-duty commercial, 230 bhp at 2,400 rpm for medium-duty commercial, and 200 bhp at 2,400 rpm continuous. Cat says the 3208 T provides the best power-to-weight ratio and largest displacement of any engine in its horsepower range. The weight of the engine and Twin Disc MG507 transmission is only 2,320 pounds. Displacement of the compact, 90-degree, V8 four-cycle diesel is 636 cubic inches (9.4 liters). The engine is equipped with a rear-mounted, water-cooled turbocharger with single exhaust outlet. Physical dimensions and connection points are the same as the current tur- bocharged 3208. For further information and free literature on these two new Caterpillar engine models, Write 38 on Reader Service Card Ralph Johnson Joins PRC Guralnick In San Diego As Naval Architect Ralph P. Johnson has joined the San Diego office of PRC Gur- alnick as a naval architect, ac- cording to John L. Torresen, vice president and chief design en- gineer. Mr. Johnson, a graduate of the University of Michigan, had been hull group supervisor at Camp- bell Industries, San Diego. His background includes five years' experience in the design of large tug, supply, and fishing vessels. A Navy veteran, he performed engineering duties for four years, and last served aboard the attack carrier USS Ranger as boiler of- ficer. Brown Named General Manager Of Toronto Harbour Commissioners Ian C.R. Brown, who has been with the Toronto Port Authority for nine years, has been appointed general manager of the Toronto Harbour Commissioners, accord- ing to an announcement by Karl Jaffary, chairman of the board. Mr. Brown succeeds Ernest B. Griffith, who remains as execu- tive director of World Trade Centre Toronto, which is operated by the Commissioners. The new general manager joined the Port Authority in 1971. Over the years he has held vari- ous posts. He was appointed as- sistant general manager in 1975. Mr. Brown is first vice president of the Canadian Port and Har- bour Association. He is also on the board of the Canadian Im- porters Association. -*Write 340 on Reader Service Card Write 199 on Reader Service Card A ship away from home is never far from Sperry No matter where in the world your ship is, it's probably not far from one of the more than 250 Sperry marine systems service facilities. Shanghai is the newest of these service centers. Skilled personnel can provide you with the technical support you may need. That includes test and checkout, overhaul and repair services—all backed with the Sperry specialized equipment, tools and parts you expect. As you'd also expect, we complement our service with a combination of classroom or shipboard training programs. Your personnel can qualify to operate and maintain Sperry equipment. If you're interested in knowing about service training for your personnel, or about other centers in the Speny network, send today for a free listing of our service facilities. It's a list growing to meet your needs. Because at Sperry, we understand how important it is to listen. For details, see your Marine Systems representative or write Sperry Division Headquarters, Marine Systems, Great Neck, N.Y. 11020. (516) 574-3232. The S.S. Letitia Lykes, the first U.S. flag vessel to reach China in 30 years, being welcomed to Shanghai. JL nr SPERRY IS A DIVISION OF SPERRY CORPORATION
