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Comsat Dedicates Roaring Creek Earth Station Comsat World Systems Division announced recently that Roaring Creek Earth Station in central Pennsylvania was officially dedi- cated on June 1, 1984. Roaring Creek Earth Station is the newest and largest international commu- nications satellite earth station in the Intelsat global communica- tions satellite system. Managed and operated by Comsat World Systems Division, Roaring Creek joins other similar stations oper- ated by Comsat World Systems Di- vision for international communi- cations satellite services. It is the most powerful and advanced earth station complex ever to be con- structed for operation in the Intel- sat system, and is jointly owned by Comsat, AT&T, RCA and Western Union International. Through the Intelsat system, people in the United States are able to make international tele- phone calls, send and receive telex messages, computerized data and fascimile to and from points abroad and view live television programs from overseas. Today, the Intelsat system carries approximately two- thirds of all international commu- nications traffic and serves 170 nations and territories. The $50- million Roaring Creek facility is located in a radio-quiet area 55 miles northeast of Harrisburg, Pa., near the town of Bloomsburg. Op- erating with Intelsat satellites po- sitioned in geosynchronous orbit some 22,300 miles over the Atlan- tic Ocean, the Roaring Creek Earth Station will connect the United States with nearly three dozen other nations. Three dish-shaped antennas tower over the Roaring Creek complex, each stretching 105 feet across. One of the three antennas, which began service in mid-May, operates in the lower of two satel- lite frequency bands, sending sig- nals to the satellite at a rate of six billion cycles per second (6 giga- hertz) and receiving them at four billion cycles per second (4 giga- hertz). Another antenna, which will begin operating later this year, transmits and receives signals in a higher frequency band (14/11 gi- gahertz). This antenna's 105-foot size makes it unique in the Intel- sat system in that other high-fre- quency band antennas usually measure about 60 feet across. The larger size at Roaring Creek less- ens the likelihood of signal inter- ference, which can be caused by heavy rainfall. The third antenna, the first dual-band antenna in the Intelsat system, operates in both the lower and higher satellite fre- quency bands. That antenna will serve as a backup to the other two antennas after it becomes opera- tional later this year. SNAME Issues Call For Papers For 1985 OTC The Society of Naval Architects and Marine Engineers has issued a "Call For Papers" to be delivered at the 1985 Offshore Technology Conference (OTC) to be held in the Astrohall, Houston, Texas, May 6- 9, 1985. A 200 to 300-word abstract should be submitted on the official OTC form by September 14, 1984. Authors should send the form to the Program Department, Off- shore Technology Conference, 6200 North Central Expressway, Drawer 64705, Dallas, Texas 75206. Cop- ies of the form may be secured from OTC or from SNAME, One World Trade Center, Suite 1369, New York, N.Y. 10048. The papers should be concerned with new knowledge or experience in some field of offshore resource and environment. SNAME's rep- resentative on the 1985 OTC Technical Program Committee is Fred E. Shumaker. Monroe D. Macpherson is the representa- tive on the OTC Executive Committee. GEMS Level Switches for Shipboard Service. Where high reliability is required for monitoring liquid levels and signaling alarms. There's a GEMS switch to meet all types of marine liquid level applications...to monitor and control levels, signal alarms, and to provide oil/water interface. Ideal for use with diesel engine fuel tanks, lube oil reservoirs, ballast, bilge, or oil sump tanks or for other common shipboard uses. fyiL. Jt^ - •» 58000 Series Single or Multi-Level Switches. Custom-made switches, using standard components, are supplied with various mounting methods, lengths, floats, materials, etc. to suit the application LS-35565 (brass)/ LS-56060 (stainless steel) Externally Mounted Models. For use where access to inside of tanks is limited, such as on lube oil or fuel day tanks. Custom-length housings. Provide ease of maintenance and tank cleaning. LS-270 Model with Protective Shielding for Turbulent In-Tank Conditions. Small and com- pact, unit side- mounts in tank Ideal for low level bilge or sump tanks, and oil/ water interface With Intrinsic Safety. Zener Barrier Safe-Pak relays, FM approved, from GEMS provide intrinsically safe operation when interfacing level switches with your AC or DC loads For application information, call toll-free (800) 321-6070. In Ohio call (800) 441-7733. GEMS SENSORS DIVISION Plainville, Connecticut 06062, U.S.A. Telephone (203) 677-1311: Telex: 99306 M Transamenca 1 ll Delaval Economical ORCA Sewage Treatment Systems offer: Space saving physical/ chemical design , requires 90% less space than biological systems. Low installation costs Simple, automatic operation Low operating and maintenance costs Reliable micro- processor control Quick delivery 6 standard models ORCA II 38' ^ ,965 f"01' Model ORCA 11-24 Model 11-12 11-24 11-36 11-165 11-330 11-500 Number people served 12 24 36 165 330 500 *lf low volume flush toilets are used, the number of people can be doubled. USCG certified and IMO approved Call or telex Dick Lambert for technical information, brochures or a quotation on a specific model. ENVIROVAC INC. SSiu,,. Telephone 815/654-8300. Telex 257-415 (ENVIROVAC RKD) Toll Free (USA only) 800-435-6951 (except in IL. HI. AK) Circle 135 on Reader Service Card THE MULTI-CLAMP SYSTEM NO SHOCK, NO VIBRATION, LOW NOISE tube and pipe support. Multi-Clamp provides a total system of planning, installing and retaining pipes, hoses and tubing on machine tools, in plants, on process machinery, in vehicles—anywhere line runs are required for hydraulic or pneumatic, cooling, lubrication, refrigeration, fuel, etc. Supports tube and pipe in singular or multiple rows, and stacks in "Building-Block" type construction. • Off the shelf delivery in sizes 3/1 6 " thru 6 " O.D. • Provides for simplified installation. A true "do-it-yourself" system. OTHER HYDROCRAFT ACCESSORIES AVAILABLE INCLUDE • Suction line filters • Filler assemblies • Reservoir end covers • Flange kits • Weld risers • Glycerin Gauges Carefully crafted, quality controlled products from the designers of Hydro-Craft Hydraulic reservoirs and Accessories 1821 ROCHESTER INDUSTRIAL DRIVE, ROCHESTER MICH. 48063 Phone: (313) 652-8100 Telex: 023-5677 38 Circle 290 on Reader Service Card Circle 171 on Reader Service Card Maritime Reporter/Engineering News
