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
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).
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
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
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.
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
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
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
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
Technology Associates, Inc. (TAI) of New Orleans, La., announced that two derivatives of vessels built from TAI’s EnviroMax designs were both launched this week. Another EnviroMax OSV built from its design was also delivered a week earlier.
The U.S. Coast Guard (USCG) final rule on escort requirements for certain tankers operating on the waters of Prince William Sound, Alaska, was published Friday in the Federal Register. This rule finalizes the escort requirements in Title 33, Code of Federal Regulations, Part CFR 168
Her Majesty The Queen has officially named the HMS Queen Elizabeth in front of a crowd that included shipbuilders, the Prime Minister and the Defence Secretary, informs the UK Ministry of Defence. The naming ceremony concluded with the smashing of a bottle of whisky over the bow of the ship
Kvichak Marine Industries, Inc. recently delivered a multi-mission 66’ all-aluminum Shallow Draft Crab and Salmon Tender to the Norton Sound Economic Development Corporation (NSEDC). The vessel was christened the Paul C. Johnson in honor of the late Paul “Koublou” Charles Johnson
Fire Departments in South Carolina and Minnesota have recently accepted delivery of Response FR-28 and FR-31J boats built of welded aluminum by Viking Welding & Fabrication in Kensington, N.H. The boats were designed by Response Marine in Newburyport, Mass.
After two sea tours to promote its inboard propulsion system, the latest Volvo Penta IPS trip will chart a new course through the Mediterranean starting May 5 in Palma, Majorca. To highlight the high-seas performance of the Volvo Penta IPS high-performance pod system in marine commercial
Aker Philadelphia Shipyard (AKPS) has reported its highest ever quarterly result, with an EBITDA of USD 24.2 million and net income of USD 17.8 million, an increase relative to Q1 2013 of 27% and 48%, respectively. The increase was driven by the gain recorded from the sale of AKPS’s
The official ceremony of launching a lead icebreaker Vladivostok of a new generation project 21900 took place on April 29, 2014 at ОАО Vyborg Shipyard. The ship is built to the class of Russian Maritime Register of Shipping (RS): KM Icebreaker6  AUT1-ICS FF2 BWM EPP ECO HELIDECK Special purpose
John Deere Power Systems (JDPS) has introduced a full line of radiator-cooled, dry-exhaust-manifold PowerTech auxiliary engines suited for powering a variety of deck auxiliaries including pumps, winches, cranes, hydraulics and generators.
Burger Boat Company announced the delivery of a 98-foot steel passenger vessel to Chicago's First Lady Cruises in Chicago. The vessel, Chicago’s Classic Lady, was designed by Seacraft Design, LLC of Sturgeon Bay, Wisc. Chicago’s Classic Lady departed the Burger shipyard Saturday
Over the past decade or so, as offshore oil has grown in importance, the development of vessels to meet the needs of the industry has made great strides. The needs for reliability in demanding sea conditions will put any hull to the test. It is not unusual for a commercial vessel serving the
COMPIT, Europe’s annual international conference on computer applications and information technology in the Maritime Industries, took place this year from May 12-14 in Redworth, U.K., with the participation of SENER. SENER’s Rodrigo Pérez presented the paper “An
GAC EnvironHull, part of global shipping, logistics and marine services provider GAC Group, has expanded its eco-friendly, brush-and-diver-free hull cleaning operation to Fujairah, just six months after its global launch. Launched in Dubai in November 2013
Caterpillar Marine announced that Cat power and propulsion solutions have been selected to provide an optimized tug package for a 55T ASD tug new build for Remolcadores Marracoi SL (REMARSL). Two Cat 3512C EPA Tier 2 propulsion engines have been selected to power the tug as well as 2x MTA
Galactica Star, the first vessel to feature the Fast Displacement Hull Form (FDHF), has won the award for the best high-speed yacht over 45 meters in length at the World Super Yacht Awards on May 3, 2014. The jury reported that the award was granted because of Galactica Star’s