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Halter Delivers Two Crewboats For Offshore Service In California alz & Krenzer Conveyor Belt Doors Solve Problem On New Keystone Collier The collier now building at Gen- eral Dynamics, Quincy, Shipyard for Keystone Shipping and New England Electric is a self-unload- er and the first coal burning and carrying vessel to be built in the United States in 25 years. Two 4-foot-wide continuous conveyor belts run the full length of the ship for unloading. To maintain watertight integrity of the four bulkheads through which the belts pass, challenging seal- ing problems arose. The Walz & Krenzer patented conveyor belt door was selected because of its unique sealing characteristic. The door employs a floating rotating butterfly sec- tion between the load and return belts which was specifically de- signed to accommodate belt drift and provide adequate vertical clearances during unloading op- erations. When the conveyor belt door is in the open position, generous vertical and side clearance are maintained, eliminating belt wear and damage in this area. No seal- ing gaskets are exposed to wear or damage during unloading op- erations. All controls and operating gear are explosion proof. For complete information and literature, Write 15 on Reader Service Card AmShip Toledo Yard Awarded Winter Repair Work On 3 Vessels The American Ship Building Company has been awarded win- ter repair work on three vessels managed by U.S.S. Great Lakes Fleet Management Service, Inc. The vessels will be repaired by American Ship's AmShip Division at its Toledo shipyard. In early July the unions at the AmShip shipyard in Toledo agreed to a new contract which contains lan- guage allowing for job flexibility similar to a contract at AmShip Division's main American com- petitor. Two identical 101-foot alumi- num crewboats, the Shawn (shown above) and Craig built by Halter Marine, Inc. for J.P.M. Ltd. of Ventura, Calif., are now serving Union 76 rigs in the Pa- cific off southern California. The boats were purchased re- cently from Halter's in stock building program and were de- livered within 42 days of con- tract signing. They made a fault- less delivery voyage from New Orleans through the Panama Canal, up to their California base. The trip was facilitated by the vessels' large 2,478-gallon fuel oil capacity. A prominent feature of each vessel is the large 55 by 17-foot aft deck, which can carry up to 30 tons of cargo. This capacity coupled with the boats' ability to carry 55 passengers gives the vessels an unusually high payload for vessels this size. The Shawn and Craig are each 101 feet 6 inches long, with a 21- foot 3-inch beam, and 9-foot 6- inch depth. Normal operating draft is 5 feet 6 inches. Each is powered by three Detroit Diesel 12v71TI engines developing 510 shp each at 2,100 rpm. They turn through Twin Disc MG514 reduc- tion gears of 2:1 ratio. Both vessels are outfitted with Decca 110 radars, Motorola SSB and VHF radios and Danforth compasses. The boats have ac- f RAYTHEON INTRODL CONTROLLED mimctvirai ICES fli 1 A ' J m •I1! NAVIGATION SOUNDING. Z 3 JFF-570 Navigation Sounder sets new performance standards for work boats, crew boats, and other coastal vessels. With the moderately priced JFF-570 6-inch Recording Echosounder (8-inch model JFF-770 available), you can sound down to 5100 feet with a full 1000 watts... then reduce power in three pre-set steps for middle and shallow bottoms. This "controlled-power' sounding gives you sharper, more accurate bottom recordings with reduced noise at all depths... a clearer presentation of bottom 4 4 SEA HUNTER 1 , . V , j''' i -if 09 ss £31 characteristics, sunken objects, and other essential navigation data. Other features: • Front-panel selection of 12 ranges. •Adjustable paper speeds (0.2" to 17min). • Optional LED bottom-depth indicator. •28 or 50 kHz (75 and 200 kHz available). •Low-noise high- sensitivity transducer (both through-hull and sea- chest). • Feet, fathoms or meters. • White-line. • STC control. •Adjustable zero-line. •Event marker. •Optional interference reducer. • Rugged, cast- aluminum cabinet with universal mounting. •Proven modular design. Fast servicing with standard plug-in's. • Unmatched two-year warranty. For details see your local Raytheon dealer or contact us directly. RAYTHEON RAYTHEON MARINE COMPANY 676 Island Pond Road. Manchester. N.H. 03103 (603) 668-1600. YOU CAN'T GET FAST TURNAROUND IF IT TAKES YOU AN HOUR TO MAKE A HOSE CONNECTION With a C-L Coupling on the hose, pipe or manifold, make- up or breakdown of a hose connection is a matter of seconds, not hours. Lost man-hours due to coupling accidents become a thing of the past. And, , because C-L Couplings are so leakproof, vibration-proof and / twist-proof, they're accepted by all international regulatory bodies for loading and off-loading of all petroleum, fluid and cryogenic cargos and many bulk cargos. C-L Couplings are available worldwide in a range of formats and in sizes from 2" through 28". Also available are models for cryogenic use and a full range of sizes with automatic ratchet locking cams. For detailed information, contact: CAMLOCK FLANGE SALES CORPORATION tUl An MMC Patented Product anOIQHC) Affiliate Company 449 SHERIDAN BLVD., INWOOD, N.Y. 11696 (212) 327-3430*1516) 239-7339 Telex:96-0140 MAMCAF INND Cable: MAMCAF INWOODNASSAUCONY Western Regional Office: 15742 Williams St.,Tustin, CA 92680 (714) 543-9089 Licensed Manufacturing Facilities and Sales Agents: Boston, New York, Chicago. Green Bay, Newport News. Jacksonville, New Orleans. Houston, Los Angeles, San Diego, San Francisco, Seattle, Cleveland U.K., Japan, Canada, Australia Write 252 on Reader Service Card 6 Write 311 on Reader Service Card Maritime Reporter/Engineering News
