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Navigation/Communication Equipment Review- Digital Marine (continued from page 22) 20 different routes, and a steer- ing indicator will guide the helms- man along. A Save and Recall feature "saves" the current time and position of a vessel with a push of a button, and the recall button displays any of the last 20 points saved. The Northstar 7000 also gives the operator a choice of the navi- gation language that suits him best: speed and distance informa- tion in nautical miles, statute miles or kilometers; position in Loran C TD's, Lat/Lon or the Phantom Loran A readout. The unit can also be used as a watch alarm, stopwatch, alarm clock, an anchor watch, and it even con- tains an anti-theft message. With all that the Northstar 7000 does, it draws less than 18 watts of power. For further information, Write 22 on Reader Service Card ELECTRO-NAV The Saturn satellite communi- cations terminal distributed by Electro-Nav, Inc. of Elizabeth, N.J., furnishes fast contact, MVI OILS MVI oil has been the oil for medium-speed diesels for nearly 50 years MVI Caprinus R Oil Is Shell's best for tow boats powered by the newest (or oldest) medium- speed diesels. For almost a half-century, engine builders and operators alike have preferred MVI (medium viscosity index) oils for medium-speed die- sels. Carbon deposits formed when using MVI oils tend to be soft and to slough off with normal engine operation. Deposits formed using HVI (high viscosity index) oils tend to be hard and continue to build up in the engines. In two-stroke units, hard deposits can block ports to the point that engine out- put suffers. Excessive ring groove fill can lead to bore polishing, broken rings and increased oil consumption. The major difference in MVI lub- ricating oils today is in the additive technology that has extended oil life, with improved lubricating qualities and greater protection against corrosion. Yet, the primary benefit of MVI oil still applies - carbon deposits remain soft, and engines stay cleaner. Shell has just completed a new plant doubling its MVI base stock capacity. Although engine manu- facturers have broadened VI limits in their engine oil recommenda- Write 333 on Reader Service Card tions in recognition of a general MVI shortage - you do not have to accept an HVI oil. Shell's new plant, combined with the increased use of oil analysis by operators to help conserve oil, means there will be enough MVI Capnnus* R Oil for the foreseea- ble future. Keep the inherent advantages of MVI oil and take advantage of mod- ern technology with MVI Caprinus R Oil for outstanding performance in your medium-speed diesels. Write today for more information on MVI Caprinus R Oil, and the MVI/HVI story. Shell Oil Company Shell Service Bureau P.O. Box 2663 Houston, Texas 77001 Come to please SEND ME: Shell for answers • Caprinus R Oil Technical Bulletin (SOC: 17-80) • Shell lubricants for motor vessels (SOC 122-79) • Shell Marine Jobber Directory (SOC: 127-79) • MVI marine mailer (SOC: 201-80) • Maritime Reporter reprint (SOC: 211-80) • MVI Questions & Answers (SOC: 204-81) TITLE COMPANY MR rmw - BB0 M " I round-the-world range, clear re- ception, and economical opera- tion. It handles telephone com- munications, telex, facsimile, and high-speed data, to and from any- where on earth. Rugged antenna and terminal construction permits operation substantially unaffected by hur- ricane force winds and heavy rain, at a temperature range of — 40 to + 65 C, even when a ship is rolling as much as 25 degrees in each direction. The terminal and power supply fit into any standard radio room console, re- ducing clutter. All connections are standard two-wire. This permits location of telephone jacks anywhere aboard ship, with full flexibility for locating telex and data and facsimile equipment. Saturn may also be wired to a ship's switch- board, allowing calls to be trans- ferred within the ship. Saturn is manufactured by EB, one of Nor- way's foremost marine communi- cations companies. For further information, Write 23 on Reader Service Card FURUNO The all-new Furuno FR-240 Mk II radar provides all the perform- ' Caprinus is a trademark and is used as such in this writing ance features needed by the com- mercial operator, with styling and price ideal for smaller vessels. Like all Furuno radars, the 240 offers outstanding performance with big-ship features such as du- al pulse lengths for sharp target definition at any range, a solid- state front end for long crystal life, and ultra-high sensitivity. Six range scales — from y2 to 24 nautical miles — are standard along with highly efficient sea and rain clutter controls. The dis- play unit features a bright 7-inch CRT (12-inch with magnifier), and is fabricated from heavy- duty marine aluminum alloy to assure long life and reliable op- eration. The top unit weighs only 46 pounds, yet features a rugged cast aluminum housing and full (continued on page 27) Write 311 on Reader Service Card 24 Maritime Reporter/Engineering News
