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Lloyd's Register Outlines Challenges Facing High- Speed Craft The technical, environmental and human challenges confronting the rapidly expanding high-speed craft industry were recently high- lighted by Chris Wade, managing director of the Marine Division of Lloyd's Register (LR). Speaking at FAST '97, the fast sea transportation conference, Mr. Wade emphasized that, in order to meet these challenges, classifica- tion societies would have to extend their involvement beyond struc- ture and machinery. According to Mr. Wade the ser- vice experience essential to cali- brate theoretical calculations or to validate model experiments is still limited for larger high-speed craft. In the formulation of its Special Service Craft (SSC) Rules, LR has elected to adopt a first principles approach taking account of the environmental envelope for the intended service, the loads to which the craft is subject, the strength assessment and the acceptance criteria. With contin- ued investment in research, Wade feels this philosophy may one day be extended into a load factor and resistance design approach and thereby represent a complete departure from the empirical rules which have been predominant. High speed craft can be con- structed from an array of materi- als including composites, alu- minum alloys, high tensile steels or, increasingly, a combination of these materials. Concern in this area, according to Mr. Wade, is related to the ability to carry out effective and economic repairs on unforeseen circumstances and in remote locations. Mr. Wade also suggested that classification societies can and should play an important role in resolving these problems when they arise and, more importantly, prevent their recurrence by intro- ducing rule changes. Dakota Creek Industries Chooses Delta T Moisture Eliminators Under a contract to provide two high-speed ferries to the City of Vallejo, Ca., commercial boat builder Dakota Creek Industries chose Delta T Systems to provide salt-and-moisture-free ventilation to the boat's engine rooms. Each of the two ferries measures 135 ft. (41.1 m) and can carry 300 passengers. Christened Intintoli and Mare Island, the all-alu- minum catamarans feature twin 2,700 hp MTU water jet engines enabling the vessels to achieve a top speed of 32 knots, cutting the trip from Vallejo to San Francisco to 53 minutes — a 10-minute improvement over previous ferry trips. "There are certain wave height requirements that have to be met, and to meet those, these boats have to stay under a certain weight limit," said Mike Snook, engineering manager at Dakota Creek. "The Delta T vents are one- third the weight of any comparable system and still provide the high- est level of protection from salt spray and moisture." To supply the large diesel engines adequately, Delta T mois- ture eliminators constructed from polypropylene were chosen. The unique S-shaped slats in these vents are designed to trap mois- ture without interrupting the flow of air. (FAST CRAFT coverage continues with an Australian Review, on page 114) TITAN MARITIME INDUSTRIES, INC. DAMAGE STABILITY • FIREFIGHTING LIGHTERING • SALVAGE GLOBAL RESPONSE TO ...Accidents at Sea .. Pollution Incidents .. .Environmental Threat Results is the reason Underwriters and Surveyors constantly rely on Titan's experienced personnel and technical expertise. USA P.O Box 350465, Ft. Lauderdale, Florida 33335 Tel: 954-929-5200 Fax: 954-929-0102 SAO PAULO • UNITED KINGDOM GERMANY, KIEL CANAL, 1996. Salvage of 2900 ton container vessel "SABINE D" in winter ice conditions . NAMIBIA, 1996. Wreck removal of the flooded Diamond Dredge "BIG RED" (Top Left) MIAMI, FLORIDA, 1996. Salvage of the 13000 DWT LPG/C "IGLOO MOON" (Top Right) BRAZIL, 1996. (not shown) Refloated the 15,000 ton freighter "AL JOHFFA" GALAPAGOS ISLANDS, 1996. (Right) Refloated wreck of 2200 ton passenger vessel, (both vessels scuttled at sea) Circle 356 on Reader Service Card HULLFORM DESIGN STRUCTURAL DESIGN STABILITY/HYDROSTATICS RESISTANCE/POWERING MANEUVERING SEAKEEPING MANUFACTURING PRODUCTION MANAGEMENT FASTSHIP MAESTRO NAVCAD AGILESHIP ™ SHIPMOPC SHIPCAM ™ PERCEPTION® Proteus Engineering 301 Pier One Road, Suite 200 Stevensville, MD 21666 USA tel +(410) 643-7496 fax +(410) 643-7535 email: flagship@atinc.com www.access.digex.net/~proteus CALL TODAY TO LEARN HOW IFLAGSHIP CAN IMPROVE YOUR DESIGN AND CONSTRUCTION PROCESS. PROTEUS IENGINEERING Quality Products For The Worldwide Marine Industry Marine heads Oily Water Separators Microflush Marine Heads in stainless steel or vitreous china use only two quarts of water per flush. Options include rear or downward discharge, internal or remote flush activators. 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