Hydrodynamics theory establishes that wave making resistance of displacement hulls originate from their body shape, especially from shoulders, midbody, and rear quarter curvatures of their waterplane at the water-air interface. These curvatures create bow waves, midbody troughs, and stern waves, which set the “hull speed” limit when the distance between bow and stern wave equal the boat’s length (speed/length ratio 1.34). Above hull speed, resistance grows at a high exponential rate. Transonic Hull (TH) technology eliminates this problem by using a slender triangular waterplane with apex at the bow, and rectilinear sides, free of curvatures, extending from bow to a maximum beam at the stern. This shape also generates the sharpest possible entry angle at the bow.
Kadey-Krogen 52’ Hull Number One Scheduled for World Debut in Seattle Boats Afloat Show, Sept. 14-18. Hull number one of the new Krogen 52’ departed Asia Harbor Yacht Builders in Kaohsiung, Taiwan on August 22 and is set to make its international debut in the Seattle Boats Afloat Show on Lake Union from September 14-18. The premiere comes just 18 months after the announcement of the new model. Testimony to the Kadey-Krogen tagline “At Home on Any Sea
Seattle - The pilot boat Connor Foss is currently under construction at the Foss Maritime Company's Shipyard in Rainier, Oregon, and will replace the Arrow 2 in June, 2012. The Arrow 2 will be taken out of service after fifty years transporting River and Bar pilots on the Columbia River at Astoria, Oregon. The Arrow 2 began service on the Columbia River in 1962. The steel hull launch boat with a single 700 horsepower engine has made thousands of pilot transfers in its long career.
Lady Michelle is a semi-displacement hull design with 28 ft. (8.5m) beam and is capable of 19 knots and is powered by two Caterpillar 3512B main engines which develop 2,250 hp each. The shallow draft of 7.5 ft., enabling it to gain access to many ports uncommon for a yacht of this size. A 16,100 gallon (62,460 L) fuel tank will allow a large cruising range of approximately 4,200 nm at 10 knots (with 10% fuel reserved).
Faster and far greener than any Megayacht in her class, a Carbon Neutral Emax Megayacht that maximizes ecology, energy, efficiency and economy to achieve a 50 to 100% reduction in fuel consumption and GHG emissions. The Ark Angel features the only compound engines other than the Curtiss Wright Cyclone to ever go into production, the Daimler Bluetec Turbo Compound DD 16 Employing the Daimler EPA “on road” turbo compound engines
The Washington State Department of Transportation Ferries Division, operating as Washington State Ferries (WSF) issued this Request for Information (RFI) to determine the availability of a foreign flagged ferry for an international ferry route, as follows: WSF is the world’s largest ferry system based on the number of vehicles carried each year and the third largest in the world based on the 23,000,000 passengers served each year
Fireboat to be Equipped with Six Fire Monitors and 26 Manifold Valves for High-Volume Water and/or Foam Firefighting. Jensen Maritime Consultants, Inc., a Crowley company, has been chosen to design a custom "super pumper" fireboat to enhance the City of San Francisco Fire Department's (SFFD) marine fire fighting and response capabilities on water. This high-volume water and foam pumping NFPA Type II fireboat will feature six fire monitors and 26 manifold
Back at the dawn of maritime history, a coastal dweller first took a log and ventured out on the water. Over time his craft evolved from a rough log to one that had shape at the ends and was hollowed out. These changes to the basic log shape were the first example of modifying a hull form to increase carrying capacity, improve ride comfort, and to reduce resistance. Since then, shipbuilders, naval architects, and ship owners have experimented with hull shapes and the number of hulls to find
In October 2011, the new RAnger 2400 Class Fireboat, American United was delivered to the Massachusetts Port Authority by the builder A.F. Theriault & Son Ltd. The vessel, named in remembrance of September 11, 2001, was designed by Robert Allan Ltd. of Vancouver, B.C., who worked closely with the Owner to define the vessel's specific operational requirements. The American United will replace Massport's existing vessel Howard W. Fitzpatrick, built in 1971. Darren Hass, P.Eng
SkipperLiner of LaCrosse, WI, recently launched a passenger/vehicle barge and towboat ferry. Here are her particulars: BARGE LOA: 78’ Beam: 32’ Hull Depth: 5’0" Draft (clearance): 3’6” Hull Thickness: 5/16" (sides) 3/8" (deck) 5/16" and 3/8" (bottom Displacement: 74.08 long tons Certification: USCG TOW LOA: 45’ Beam: 16’ Hull Depth: 6’0" Draft (clearance): 4’6” Gross Tons: Less than 100
Volvo Penta now launches its IPS900 propulsiion system making it suitable for boats in the Coast Guard & Patrol, Supply Vessels, & Offshore Energy & Passenger Transport segments, as well as yachts. Volvo Penta IPS is the modern inboard system
1,850 nautical miles, seven legs, six stopovers and 27 days This summer, Volvo Penta takes one of its test boats down to the English Channel to show dealers, customers, press and other interested parties the benefits of the Volvo Penta IPS high performance pod system
Volvo Penta is now launching IPS900 with Rating 3 for commercial boats, which they say means a larger number of boats for commercial use can take advantage of the well-known IPS benefits: improved fuel economy, better maneuverability and lower overall operating costs.
Incat's dual fuel fast ferry has commenced sea trials in Hobart Tasmania. The 99-meter vessel's twin LNG tanks were loaded with LNG for the first time last week. Testing of the gas system went underway with the GE LM2500 gas turbine engines being run on gas for the first time on May 27 at the
Motion and control technology specialists, Parker Hannifin, recently introduced the compact, icountBSplus. The icountBSplus is a fully contained, portable bottle sampling system that uses laser particle counting technology to ensure fast and accurate detection of contamination in hydraulic oils
Customized application for multi-missioned workboats recognizes that all workboats have more than one job. In an increasingly expensive market for workboats, any advantage that can be leveraged to save time, money, fuel and deck space on the job is a precious commodity
The Department of Defense award Metron Inc. a contract for development of a large displacement unmanned undersea vehicle (LDUUV). Metron, Inc., of Reston, Va.,is being awarded a $7,287,619 cost-plus-fixed-fee contract to include in-lab integration and testing of autonomy and mission
Samskip Multimodal is increasing capacity on shortsea services connecting Rotterdam to Hull, United Kingdom, further reducing transit times. Samskip Multimodal said that as of May 14 it will replace the 340 TEU Veritas H with the 803 TEU Henrike Schepers on its Netherlands to U.K
HydroComp NavCad is software for resistance and propulsion that can be found in the toolbox of naval architects and marine professions from around the world. First introduced in 1988, NavCad has undergone numerous upgrades in its 25-year history
Aberdeen-based oilfield services firm Coretrax Technology Limited appointed an operations manager to focus on the planning, development and execution of wellbore cleanup and displacement. In his new role, Jim Hepburn is responsible for the pre- and post-job analysis of wellbore cleanup
The Portuguese Frigate 'NRP Álvares Cabral' joins the EU Naval Force (EU NAVFOR) Somalia – Operation Atalanta – as flagship. During her participation in Operation Atalanta, for the next 4 months, Álvares Cabral will be the EU Naval Force flagship
MTU North American Training Center announces arrival of new Series 8000 marine engine for maintenance & repair training. Tognum America has announced the arrival of an MTU Series 8000 marine engine at its 30,000 square-foot MTU Training Center in Canton, Mich
Geo Shipyard Inc, New Iberia, La, delivered the R/V Apalachee, a 64x21x9’, aluminum catamaran for Florida State University Coastal and Marine Laboratory, St Teresa, Florida. Designed by Fyffe Yachts with NC lofting by Eli Ring, VP of Advance Fabricating, both of Kemah, Texas
SHC Wavedancer, with a new patents pending design, is capable of transforming from a high speed catamaran to a semi-submersible platform. The desingers believe that this innovation has enormous global potential for use in the offshore energy markets
Nothing Beats Reality As advances in computing power have made marine training via simulator more mainstream, the majority would contend that the most effective training is on the water, at the helm. While training on real-world vessels can be tough due to time and safety constraints