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ROWAN'S SECOND GORILLA—The Ro wan Gorilla II shortly after its recent launch at Marathon LeTourneau Offshore Company's construction facility in the Republic of Singa- pore. The massive jackup is scheduled for delivery to Houston-based Rowan Companies, Inc. this month. With the rig in the water, the rest of its three 504-foot-tall steel lattice-work legs will be added. The first Gorilla rig, the Rowan Gorilla I, has been drilling near Sable Island, offshore Halifax, Nova Scotia, since early in 1984. The Rowan Gorilla III, now under con- struction at Marathon LeTourneau's rig yard in Vicksburg, Miss., is scheduled for delivery near the end of this year. Halpern And Liou Promoted At M. Rosenblatt & Son Stephen Halpern Yong T. Liou Lester Rosenblatt, chairman of M. Rosen- blatt & Son, Inc., naval architects and marine engineers, recently announced the appointment of Stephen Halpern as vice president and manager, Western Division, and Yong T. Liou as assistant vice president and chief engineer of the San Francisco office. The Western Division is headquartered in San Francisco, with branch offices in San Diego, Honolulu, Oxnard, Calif., Bremerton, Wash., and Yokosuka, Japan. Mr. Halpern joined the Rosenblatt firm in 1953 as a program manager in the New York office. He became chief engineer of the Western Division in 1963, and held that position until the retirement of Ephraim (Fred) Kaufman as manager of the Division. He is a civil engineer- ing graduate of Lehigh University and has taken courses in naval architectue at MlT. Mr. Liou joined Rosenblatt's San Francisco office in 1963 after receiving his master's degree in naval architecture from the University of Cal- ifornia in Berkeley. He was later appointed head of the Hull Engineering Department, a position he held for 12 years. Screw Compressors Improve Air Conditioning Reliability —Free Literature Available Increased operating reliability, less mainte- nance, and better adaptability to different cli- matic conditions—these are some of the experi- ences reported by Swedish shipowners Johnson Line and Brostroms, who have become the first to test a new air-conditioning technique by put- ting it into full-scale shipboard operation. September 15, 1984 These two companies have replaced piston compressors previously installed on two ships— Johnson's Chemspan and Brostroms' Viking- land—with screw compressors. These compres- sors, called Miniscrew and manufactured by Stal Refrigeration AB of Sweden, are the result of a new concept based on more than 20 years of successful development in cooling techniques for marine applications. The new compressors operate in a low-capacity range, 160-700 kw cooling power, which was previously considered uneconomical for screw compressors. The Miniscrew range consists of six screw compressors with economizer versions. The compressors are also designed to work with high-pressure flow up to 380 psi. The system uses all standard refrigerants, and operates at power frequencies of 50 or 60 Hz. Independent surveys have shown that mainte- nance costs can be halved compared with piston compressors. In addition, the risk of breakdown is minimal. According to the Marine Research Institute in Flensburg, West Germany, the ratio is given as 1:10 in comparison with piston com- pressors. The Miniscrew range is designed with either horizontal or vertical compressor mounting. This allows for compact installations and en- ables the units to be easily adapted to existing plant, foundations, etc. Behind the newly launched Miniscrew con- cept, based on the operation of two asymmetri- cal rotors with four and six lobes, respectively, and in the smaller stroke volume ranges, is more than 20 years of experience in the development, manufacture, and installation of screw compres- sors and compressor units. For further information and free literature on the Miniscrew compressors, Circle 12 on Reader Service Card Bell Halter SES Chartered For Offshore Oil Rig Supply Work In Gulf Of Suez Bell Halter Inc. of New Orleans has entered into an agreement whereby Offshore GAC Ser- vices, Ltd. will charter a 110-foot surface effect ship (SES) to transport supplies and personnel to oil rigs in the Gulf of Suez, offshore Egypt. The announcement was made by Bell Halter president John J. Kelly. The vessel, Margaret Jill, is scheduled to depart New Orleans in time to begin operations in Egypt before the end of this year. This SES will be similar to those chartered to Command Marine, Inc. of Lafayette, La. That company was the first commercial operator of the Bell Halter SES, and has operated them in the Gulf of Mexico since 1981. Offshore GAC Services, with primary opera- tions in the Middle East, is well postured to take advantage of the unique capabilities of the SES in that area, according to spokesmen for the companies. Designers and Fabricators Marine and Construction Equipment • Anchor-handling and • Towing Pins Towing Winches* • Cargo Winches* • Hydraulic Tuggers • Cranes* • Anchor Windlasses • Stern Rollers • Pneumatic Monitoring • Capstans Systems • Cable Stops 'Built under license from A/S Hydraulik Brattvaag The Sea Demands The Best P.O. Box 569 Covington, Louisiana 70434 Telephone (504) 892-8216 Circle 215 on Reader Service Card DEL GAVIO MARINE HYDRAULICS, INC. SERVICE • CONSULTING • PARTS Complete Repairs On All Types of Electro Hydraulic Steering Systems Hydraulic Pump Testing, Rebuilding For Certification 24 Hour Service, Worldwide 207 West Central Ave., Maywood, N.J. 07607 Telephone: (201) 843-4700 Circle 340 on Reader Service Card JOINER DOORS THE NAVY'S LIGHTEST AND STRONGEST JOINER DOORS - IN STOCK AND AVAILABLE IMMEDIATELY ! Lightweight Honeycomb Doors U.S. Navy Approved T TYPE 1 TYPE 2 Aluminum Honeycomb *GRP/Nomex" Aramid TYPE 3 "CRES Honeycomb 'Steel Honeycomb TYPE 4 DOUBLE DOOR ADVANCED STRUCTURES CORP. 235 WEST INDUSTRY COURT DEER PARK, NEW YORK 11729 (516) 667-5000 NOMEX ARAMID IS A TRADEMARK OF DUPONT Circle 333 on Reader Service Card 27
