Page 87: of Maritime Reporter Magazine (December 1985)

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