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Commercial Marine Industry Marine Composites trawlers in the U.S. is still limited, but in spite of the fisherman’s conservative nature and the relatively small market, the number of GRP trawlers is slowly increasing, while the production of small GRP fishing boats is advancing. There is a growing interest in GRP trawlers, mainly in the areas of shrimp lobster and salmon fisheries. [1-23] Fishing boat manufacturers, engaged in building trawlers that range in length from 45 to 85 feet and displace between 35 to 120 tons, initially resisted the obvious appeals of reinforced plastic (RP). It was inconceivable to many fishermen - the romance and tradition of whose trade is so bound up with wooden vessels - that they should go down to the sea in ships made of plastic. But here, as in the small pleasure craft industry, economy and utility are winning out over romance and tradition. Approximately 40% of all trawlers manufactured in the United States today are made of RP. [1-24] Although most of the yards that built the large fishing trawlers in this country during the 1980s are still around, many have moved on to other types of vessels. The industry is simply overstocked with vessels for the amount of ongoing fishing. The Maine boatbuilders that fabricate smaller, lobster-style boats are still moderately active. There has evolved, however, a demand for both trawler and lobster boats for pleasure use. Lifeboats fi The first FRP lifeboats were built in Holland in 1958 when Airefxoam core made its debut in a 24 foot vessel. The service profile of these vessels make them ideally suited for FRP construction in that they are required to be ready for service after years of sitting idle in a marine environment. Additionally, the craft must be able to withstand the impact of being launched and swinging into the host vessel. The ability to economically produce lightweight hull and canopy structures with highly visible gelcoat finishes is also an attribute of FRP construction. Watercraft America Watercraft is a 40-year old British company that began operations in the U.S. in 1974. The company manufactures 21, 24, 26 and 28 foot USCG approved, totally enclosed, survival craft suitable for 23, 33, 44 and 58 people, respectively. Design support is provided by Hampton University in England. The vessels are diesel propelled and include compressed air systems and deck washes to dissipate external heat. Figure 1-24 shows the general configuration of these vessels. The plumbing incorporates PVC piping to reduce weight and maintenance. Hull and canopy construction utilizes a spray lay-up system with MIL-1140 or C19663 gun roving. Resin is MIL-R-21607 or MIL 7575C, Grade 1, Class 1, fire retardant Figure 1-24 Enclosed Liferaft [Watercraft] 24 Typical Configuration of WatercraftPDF Image | Marine Componsites
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