Marine Log - September 2007 - (Page 18) HIGH SPEED CRAFT ICE Natchan Rera at a Glance Length overall: 112.60 m Beam (molded): 30.50 m Draft: approximately 3.93 m Speed: 40 knots Fuel consumption: <190 g/kwh Deadweight: Up to 1450 tonnes Total persons: 800 persons Vehicle Deck: 450 truck-lane meters plus 193 cars or a total of 355 cars. time currently taken for voyages between Aomori and Hakodate by the existing ships. The Natchan Rera is powered by four MAN 20V 28/33D diesel engines, each rated at 9,000 kW at 1,000 rev/min. The engines deliver a relatively low weight to power. In addition, Incat says the engines offer impressive fuel economy. The ship will burn a very frugal 120 grams of fuel for every tonne of cargo per mile traveled—less fuel per cargo tonne per hour than any other high speed catamaran, according to Incat The vessel is also environmentally compliant with low NOx emissions of <10g/kWh. In 1998, Incat conceived that a larger wave piercing catamaran was required to fill a market niche for a larger high speed ferry. After several years of research, the 112 m design emerged. The Natchan Rera is a result of that research and it is a vessel that the worldwide high speed craft community will be watching with interest. THE TECHNOLOGY At this point, we need to remember that from a naval architectural viewpoint, the Nathan Rera is indeed a catamaran, even though the wave piercing bow may make it look like a trimaran. Similarly, some competing designs that also may look like trimarans are actually monohulls with stabilizing outer hulls. A paper on “Seakeeping of Wave Piercing Catamarans” by Gary Davidson and Tim Roberts of Revolution Design Pty Ltd. Tasmania, Australia, notes that while speed and deadweight have traditionally been the subject of passionate industry discussion, seakeeping is the new hot topic. They say that the effects of size and hull separation on a catamaran’s seakeeping are significant and that greater size and increased hull separation will decrease motions and accelerations. 18 MARINE LOG SEPTEMBER 2007 www.marinelog.com http://www.workboatshow.com http://www.workboatshow.com http://www.workboatshow.com http://www.marinelog.com
Table of Contents Feed for the Digital Edition of Marine Log - September 2007 Marine Log - September 2007 Contents Update Inside Washington High Speed Design Heads into New Waters The National Maritime Salvage Conference & Expo Guide China Aims for the Top Azipods: Just Add Ice Rigdon Scores Newsmakers Tech News Contracts Events Website Directory InfoDirect Ml Marketplace Last Word Marine Log - September 2007 Marine Log - September 2007 - Marine Log - September 2007 (Page Cover1) Marine Log - September 2007 - Marine Log - September 2007 (Page Cover2) Marine Log - September 2007 - Contents (Page 1) Marine Log - September 2007 - Contents (Page 2) Marine Log - September 2007 - Contents (Page 3) Marine Log - September 2007 - Contents (Page 4) Marine Log - September 2007 - Contents (Page 5) Marine Log - September 2007 - Contents (Page 6) Marine Log - September 2007 - Update (Page 7) Marine Log - September 2007 - Update (Page 8) Marine Log - September 2007 - Update (Page 9) Marine Log - September 2007 - Update (Page 10) Marine Log - September 2007 - Update (Page 11) Marine Log - September 2007 - Update (Page 12) Marine Log - September 2007 - Update (Page 13) Marine Log - September 2007 - Inside Washington (Page 14) Marine Log - September 2007 - Inside Washington (Page 15) Marine Log - September 2007 - Inside Washington (Page 16) Marine Log - September 2007 - High Speed Design Heads into New Waters (Page 17) Marine Log - September 2007 - High Speed Design Heads into New Waters (Page 18) Marine Log - September 2007 - High Speed Design Heads into New Waters (Page 19) Marine Log - September 2007 - High Speed Design Heads into New Waters (Page 20) Marine Log - September 2007 - High Speed Design Heads into New Waters (Page 21) Marine Log - September 2007 - High Speed Design Heads into New Waters (Page 22) Marine Log - September 2007 - High Speed Design Heads into New Waters (Page 23) Marine Log - September 2007 - High Speed Design Heads into New Waters (Page 24) Marine Log - September 2007 - High Speed Design Heads into New Waters (Page 25) Marine Log - September 2007 - High Speed Design Heads into New Waters (Page 26) Marine Log - September 2007 - The National Maritime Salvage Conference & Expo Guide (Page 27) Marine Log - September 2007 - The National Maritime Salvage Conference & Expo Guide (Page 28) Marine Log - September 2007 - The National Maritime Salvage Conference & Expo Guide (Page 29) Marine Log - September 2007 - The National Maritime Salvage Conference & Expo Guide (Page 30) Marine Log - September 2007 - The National Maritime Salvage Conference & Expo Guide (Page 31) Marine Log - September 2007 - The National Maritime Salvage Conference & Expo Guide (Page 32) Marine Log - September 2007 - The National Maritime Salvage Conference & Expo Guide (Page 33) Marine Log - September 2007 - The National Maritime Salvage Conference & Expo Guide (Page 34) Marine Log - September 2007 - The National Maritime Salvage Conference & Expo Guide (Page 35) Marine Log - September 2007 - The National Maritime Salvage Conference & Expo Guide (Page 36) Marine Log - September 2007 - The National Maritime Salvage Conference & Expo Guide (Page 37) Marine Log - September 2007 - The National Maritime Salvage Conference & Expo Guide (Page 38) Marine Log - September 2007 - The National Maritime Salvage Conference & Expo Guide (Page 39) Marine Log - September 2007 - The National Maritime Salvage Conference & Expo Guide (Page 40) Marine Log - September 2007 - The National Maritime Salvage Conference & Expo Guide (Page 41) Marine Log - September 2007 - The National Maritime Salvage Conference & Expo Guide (Page 42) Marine Log - September 2007 - China Aims for the Top (Page 43) Marine Log - September 2007 - China Aims for the Top (Page 44) Marine Log - September 2007 - China Aims for the Top (Page 44B) Marine Log - September 2007 - China Aims for the Top (Page 44C) Marine Log - September 2007 - China Aims for the Top (Page 45) Marine Log - September 2007 - China Aims for the Top (Page 46) Marine Log - September 2007 - China Aims for the Top (Page 47) Marine Log - September 2007 - Azipods: Just Add Ice (Page 48) Marine Log - September 2007 - Azipods: Just Add Ice (Page 49) Marine Log - September 2007 - Rigdon Scores (Page 50) Marine Log - September 2007 - Rigdon Scores (Page 51) Marine Log - September 2007 - Rigdon Scores (Page 52) Marine Log - September 2007 - Rigdon Scores (Page 53) Marine Log - September 2007 - Newsmakers (Page 54) Marine Log - September 2007 - Newsmakers (Page 55) Marine Log - September 2007 - Tech News (Page 56) Marine Log - September 2007 - Tech News (Page 57) Marine Log - September 2007 - Tech News (Page 58) Marine Log - September 2007 - Tech News (Page 59) Marine Log - September 2007 - Contracts (Page 60) Marine Log - September 2007 - Events (Page 61) Marine Log - September 2007 - Website Directory (Page 62) Marine Log - September 2007 - InfoDirect (Page 63) Marine Log - September 2007 - Ml Marketplace (Page 64) Marine Log - September 2007 - Ml Marketplace (Page 65) Marine Log - September 2007 - Ml Marketplace (Page 66) Marine Log - September 2007 - Ml Marketplace (Page 67) Marine Log - September 2007 - Last Word (Page 68) Marine Log - September 2007 - Last Word (Page Cover3) Marine Log - September 2007 - Last Word (Page Cover4) Marine Log - September 2007 - Last Word (Page Ad Alert)
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