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Navigation/Communications Equipment — A Review (continued) sign, software development, train- ing, and worldwide service. The company combines the full range of disciplines and technical skills to design, develop, implement, and support complex shipboard comput- er and communications installa- tions. Circle 67 on Reader Service Card NAV-CONTROL Nav-Control, Inc. of Halesite, N.Y., is a new firm formed to be the authorized U.S. agent for the navi- gation/instrumentation products manufactured by the Norcontrol Di- vision of A/S Kongsberg Vaapenfa- brikk in Norway. Nav-Control will also administer certain projects and in-process contracts on behalf of Norcontrol. One of the major breakthroughs in modern navigation has been the development of the automatic radar plotting aid (ARPA). However, even though the microprocessor-con- trolled ARPA has landed navigators in the computer age, they still expe- rience environmental pressure fol- lowing the need for manual plotting and logging during stress situa- tions. Now, at the touch of a switch, an officer can insure accurate and auto- matic plotting and logging through the additional features provided for the Norcontrol DataBridge-7 radar navigation and ARPA system. The main innovation has focused on ex- tending the system's unique radar map overlay functions by adding unlimited storage capacity, an X/Y track plotter, and datalogger. Another optional feature allows radar maps to be stabilized with the aid of navigation data where fixed points for radar tracking are miss- ing. The map function allows over- lays to be constructed that show fea- tures not visible on the sea surface, such as wrecks, oil or gas pipelines, traffic separation zones, shallows, and international boundaries. Coast Guard vessels benefit from the ca- pability of recording the position of target vessels including own ship in relation to fishing boundaries or other "invisible" lines. Norcontrol's DataBridge-7 is a third-generation ARPA that ac- quires and tracks up to 50 radar tar- gets and continuously displays colli- sion-avoidance data on the most threatening 20. It will sound a colli- sion warning alarm whenever any of these targets exceed user-specified values for closest point of approach and time to closest point of ap- proach. As a collision-avoidance sys- tem, DataBridge-7 meets or exceeds IMO recommendations and U.S. Coast Guard and Maritime Admin- istration standards. Circle 98 on Reader Service Card NAVIGATION SCIENCES The Viewnav® master mariner electronic chart system from Navi- gation Sciences Inc. of Bethesda, Md., is being used increasingly by operators of pilot boats, ferries, tankers, and tugboats who want an extra edge to navigate more accu- Racal — Decca ARPA 1690 rately in difficult harbor conditions. It is particularly valuable to ferry- boat and other operators responsi- ble for passenger safety, who must maintain precise schedules in all kinds of weather. The Viewnav system combines differential Loran C with radar and NOS-quality, full-color digitized charts, and proprietary software to provide the most complete tactical navigation information possible. The system uses differential Loran position fixes of own vessel accurate to within five yards. Radar images are superimposed and displayed in water areas to show vessel traffic and other targets. i/Vhen you go to sea, you need a lifeline you can always trust. Under all circumstances. With no sxceptions. That's why the Harris RF-230M HF-SSB syn- :hesized transceiver belongs on your boat. It's built :o the same exacting standards of quality and con- /enience that have made its military counterpart standard equipment for combat use And its repu- :ation for reliability is backed up by sales: more :han 5,000 units sold worldwide for land and mari- :ime use. The quality starts with power: a full 125 /vatts, available through as many as 96 preset channels. Banded automatic servo :uning directs the output through the antenna ;oupler, and constantly adjusts to changing condi- ions. Whether you're one mile or one thousand miles from shore, you're never out of touch. THE HARRIS •RF-230M. BECAUSE •RELIABLE • COMMUNICATION • IS NOT • A LUXURY Electronically Alterable Read Only Memory (EAROM) allows the RF-230M to be programmed internally, on the spot—with no crystals to change! You'll find convenience designed into every fea- ture of the RF-230M. Compact modular construc- tion and completely solid-state design conserve your valuable cabin space. Simple, easy-to-read controls—with features like thumb wheel fre- quency selection, dimmer controls and back- lighted indicators—make operation easy. Find out more about the RF-230M and its full line of accessories. Write or call us: HARRIS CORPORATION, RF Commu- nications Group, 1680 University Avenue, Rochester, New York 14610 U.S.A., Tel: 716-244-5830. Telex: 978-464. m m Circle 172 on Reader Service Card Buoys, navaids, and channels are shown in actual chart colors. Own ship is a to-scale, vessel-shaped out- line, and radar images appear in bright red. When a buoy is off sta- tion, the electronic chart shows where the buoy should be while the radar images show where the buoy actually is. The true-motion presen- tation is displayed in selectable ranges from one to 48 NM square, with automatic electronic chart ad- vancement. Alphanumeric data ap- pears on-screen, giving speed, course, time, distance, heading to the next waypoint, movable cursor position and more. Keyboard con- trol consoles are available with a f 4-, 20-, or 25-inch CRT color moni- tor. Two new products, the Viewnav electronic chart offshore platform monitoring system for oil rig and pipeline traffic management, and the Viewnav harbor monitoring sys- tem, have been introduced to meet these stationary marine monitoring applications. To alert rig operators of potential collision danger, and to help them warn ships of potential collision or potential anchorage damage to pipelines, the platform monitoring system offers precise electronic charts of the entire plat- form and pipeline configuration. An automatic radar plotting aid (ARPA) replaces Loran C in this system, allowing up to 40 targets— ships, boats, even low-flying air- craft— to be simultaneously tracked, identified, and classified. To airport authorities, pilots' groups, tug companies, and others who must know where vessel traffic is and help guide vessels into and out of harbors, the harbor monitor- ing system features detailed full- color charts and vessel radar re- turns, including anchorage grids for fast location, tracking, and identifi- cation of vessels. The data base can recall and display on-screen alpha- numeric information such as ar- rival/departure times and pilot names. Circle 68 on Reader Service Card Cjj For your information, our name is Harris. CKV 30 Maritime Reporter/Engineering News
