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Coast Guard Completes Installation Of Advanced Navigational Aid In N.Y. Harbor The U.S. Coast Guard has completed the installation in New York Harbor of the Inogon Leading Mark, a single station, short-range optical guidance system that directs vessels safely and accurately through narrow channels. The system, which had previously undergone testing by the Coast Guard's Research and Development Center in Groton, Conn., is now fully operative in one of the nation's busiest commercial shipping lanes—the Constable Hook channel between Staten Island, N.Y. and Bayonne, N.J. in New York Harbor. According to Inogon Corporation president Robert J. Axel, whose company supplied the device, the system uses a lighted moire optical effect to give a ship's pilot clear, easy-to-under- stand continuous indications of a ship's position with respect to the center of the channel; and precise information about how the ship should be steered to maintain its centerline position. It is usable by incoming pilots from as much as 35 degrees off center. "The operation of the Inogon Leading Mark System," said Mr. Axel, "is based upon an opti- cally safe visual effect caused by changes in the pilot's angle of vision. Light projected through two closely spaced superimposed lens gratings on the face of the beacon create an opaque black visual pattern on a brilliantly lighted back- ground." Mr. Axel added, "So long as the ship is in the center of the channel, the pilot will see a single black vertical line in the center of the Inogon Leading Mark. If the ship strays to the port or starboard of the centerline, the pilot will see a Steer right Online Steer left un 11 I! .s /1 \ Drawing shows the operation of the Inogon Leading Mark. pattern of arrows pointing in the direction required to correct the position. The density of the arrow pattern indicates how large a correc- tion should be made, as well as the rate of devia- tion from or toward center." Inogon Leading Marks have no moving parts or electronic components, and operate automat- ically without requiring any onboard equip- ment. They have been tested and approved for use in harbors, canals and channels by many European regulatory authorities, including the Swedish Administration of Shipping and Navi- gation and the West German Seezeichen- versuchsfeld. For additional information on the Inogon Leading Mark, Circle 26 on Reader Service Card WINCHES—Steam or Air Operated Stockless Anchors 3,000 lbs. through 27,500 lbs. in stock, FOB Jersey City Large inventory of surplus chain and fittings Supply of new chain, including ten shots of 2 5/16" and twenty shots of 2 5/8" 9 x 12 American Hoist & Derrick Winches, reconditioned equal to new Spare parts for all steam winches STANDARD STEAM WINCH CO., INC. Agents for The Crosby Group 191 Von Vorst St., Jersey City, N.J. 07032 201/433-6974 Sea Tree Launches Converted U.S. Navy Landing Craft For Use In Alaskan Waters Over the past five years, Sea Tree Enterprises has special- ized in the conversion of U.S. Navy Landing Craft to com- mercial vessels, most of which are now working in Alaska. Sea Tree Enterprises Inc. of San Diego, Calif., recently launched another in its series of refur- bished U.S. Navy landing craft for Alaskan waters—the Morning Thunder. The owners, Smith Literage of Dillingham, Alaska, plan to use the vessel to haul freight and tow their new 120-foot fuel barge. Since the Morning Thunder's primary use will be in shallow draft areas such as hard-to-get-to river villages, Sea Tree replaced her standard %6-inch bottom with ^6-inch to stand up to the many anticipated beachings. Additionally, twin Detroit Diesel 8-71 engines were installed with 1:5-1 Twin Disc gearbox, and a 5-ton galvanized Anthony crane was installed just forward of the pilothouse. Other features include push knees, a special forward anchoring system, and Sea Tree's standard tire fender system. With over 20 landing craft conversions cur- rently working on the West Coast and Alaska and more on the drawing board, Sea Tree con- tinues to play a major role in the specialized field of shallow draft vessles. For further information, Circle 84 on Reader Service Card Versatile Completes $2.7-Million Refit Of USN Tanker Versatile Pacific Shipyards of Vancouver, Canada, recently completed a 45-day refit of the USNS Kawishiwi, a tanker, under a contract valued at $2.7 million. It was the third refit con- tract completed this year for the Military Sealift Command by the Western Canadian yard. The two previous contracts for the U.S. Mili- tary Sealift Command were the auxiliary supply ship, Spica, which underwent a 10-week refit at a cost of $3.5 million completed in June, and the Naval cable ship, Neptune, refitted in 60 days at a cost of $1.2 million and completed in Janu- ary. For further information on Versatile Pacific Shipyards and their services, Circle 79 on Reader Service Card JOINER DOORS THE NAVY'S LIGHTEST AND STRONGEST JOINER DOORS - IN STOCK AND AVAILABLE IMMEDIATELY ! Lightweight Honeycomb Doors (Meets U.S. Navy Specs) O o —S TYPE 1 TYPE 2 TYPE 3 ^Aluminum Honeycomb *CRES Honeycomb *GRP/Nomex Aramid *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 245 on Reader Service Card -MELE-SHAW* m f YO F? AU L_l cz: s MANUFACTURER SERVICE REPAIR PARTS CMH HELESHAW, INC. 201 HARRISON STREET HOBOKEN, NEW JERSEY 07030 NEW YORK: (212) 267-0328 HOBOKEN: (201) 792-0500 TWX: 710-730-5224 CMH HBKN JON M. USS ASSOCIATES, INC. 411 BOREl AVENUE, SUITE 505 • POST OFFICE BOX 5554 • SAN MATEO, CALIFORNIA 94402-0554 NAVYSTANDARD VANEAXIALFANS Delivery From Stock Reconditioning and Rewinding by Dahl Beck Electric. Available with Warranty. (415)573-9191 TELEX 17-2655 GOJON SMT December, 1985 Circle 302 on Reader Service Card
