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Deck Machinery McElroy—continued tugger is manufactered in a 5-ton line pull model and a 10-ton model. A 15-ton and 20-ton model are on the drawing boards for the future. The stern rollers are manufac- tured as a standard model or a heavy-duty model. Custom sizes are also available upon request. Some of the latest installations have been hydraulic tuggers aboard the last Nicor Boat built at Moss Point Marine in Escatawpa, Miss., anchor windlasses for the Gulf Fleet boats being built at St. Louis Ship, and the Gulf Fleet boats being built at Quality Shipyards in Houma, La. Additionally, McElroy Machine furnished the capstan and vertical capstan/windlasses for the split hopper dredge built at Southern Shipbuilding, Slidell, La., and the vertical capstans for the landing craft built by Champion Swiftships of Pass Christian, Miss. McElroy Machine has a complete engineering and design department to assist with special or custom specifications and machinery. For additional information, Circle 36 on Reader Service Card MARCO In addition to improvements made to existing products, Marco of Seattle introduced three new pieces of fishing deck machinery recently. First was a new aluminum longline drum, used in a variety of longline MOORING, UTILITY, SPHERICAL, PENDANT, ETC. We also produce a full line of Foam- Filled Fenders. •ll ..Ik " • Highly stable mooring & marking buoys. • Unsinkable even if severely damaged • Tough cast polyurethane skin resists abrasion and impact • Core of closed cell foam. • Optional mooring attachments and marker lights available • Standard color bright orange — can be highlighted with markings in any color. • Available for prompt delivery • We've made thousands of these time tested products. • Sizes to fit any application from 301b. to 25.000 lb net buoyancy InterTrade (714)8945566 INDUSTRIES Marine Products Division 15301 Transistor Lane, Huntington Beach, CA 92649 U.S.A. Circle 121 on Reader Service Card When you go to sea, you need a lifeline you can always trust. Under all circumstances. With no exceptions. That's why the Harris RF-230M HF-SSB syn- thesized transceiver belongs on your boat. It's built to the same exacting standards of quality and con- venience that have made its military counterpart standard equipment for combat use. And its repu- tation for reliability is backed up by sales: more than 5,000 units sold worldwide for land and mari- time use. The quality starts with power: a full 125 watts, available through as many as 96 preset channels. Banded automatic servo tuning directs the output through the antenna coupler, and constantly adjusts to changing condi tions. 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. w I I -H t For your information, our name is Harris. fisheries on both coasts of the U.S. and Canada, as well as in other areas of the world. The hydraulically pow- ered drum features gear drive that makes it powerful enough that no secondary hauler is required. The new unit also features a diamond- screw levelwind and a unique de- clutching motor and adjustable drag brake to control freewheeling speed. Marco's San Diego-based subsid- iary, Campbell Industries, recently introduced a long-needed product for the world's high-seas tuna purse seine fisheries. Its new purse block for large superseiners is larger and yet 50 percent lighter, at 210 pounds (95 kg), than any other block of its capacity (20T/18mt). This new, stronger block features a spring-loaded grease reservoir to automatically maintain lubrication under load, eliminating the problem of bearing failure due to inadequate lubrication. The design also handles 1-inch (25-mm) connecting links through its throat, which are neces- sary to handle the heavier loads on %-inch (22-mm) purse lines with 1-inch center piece. The most recent introduction by Marco was its unique line of Foam- Flo fish pumping systems. Designed to meet the particular needs of the salmon and herring fisheries, the FoamFlo was developed with its chief goal being fish quality. The challenge has been to develop a pump that could handle great quan- tities of product, and yet treat both small and large species without damage. With its unique combina- tion of injected water and air creat- ing flow, FoamFlo answers this im- portant challenge. For further information on Marco products, Circle 37 on Reader Service Card MARKEY MACHINERY With work vessel construction continuing to be slow, the challenge to maintain quality standards in the face of extremely competitive pric- ing remains intense. Markey Ma- chinery Company (MMCO) of Seat- tle has supplied the oceanographic community with several research winches during the past year, with the focus being on the ac-SCR-dc drive systems with 50- and 75-hp output ratings. As an alternative to the variable-displacement hydraulic systems, these dc drives are proving to be energy-efficient, quiet, highly tunable, and clean, as well as pro- viding a side speed range and excel- lent control. An entire new generation of very large winches and rig anchor chain windlasses is looming as the energy industries move into deeper water where present units and their equip- ment are marginal or overmatched. Anchor-handling wires of 2-%-, 2-%-, and 3-inch diameters with scopes of 3,500 to 5,000 feet are being seri- ously considered. Barrel-layer line pulls of from 500,000 to 750,000 pounds are required in order to offer enough working pull farther up the drum stack. Much more critical than the hoisting service is the ma- chinery and control necessary to safely lower up to four anchors into <- Circle 212 on Reader Service Card
