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Displacement Hulls

Transonic Hull Technology for Offshore Vessels

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 Scheduled for Debut

Krogen 52 Hull

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


New Pilot Boat Soon to Launch in Oregon

The pilot boat Connor Foss under construction.

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.


Trinity Delivers M/Y Lady Michelle

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).


Sauter Carbon Offset Design presents the Champion of Green Power

Arch Angel LSV at sea.jpg

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


Foreign Flagged Ferry for Pacific NW Route

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


Jensen to Design Fireboat for San Francisco

Depiction: Jensen Design Custom Super Pumper Fireboat

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


What Hull Shape Is Best?

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


New Fireboat Delivered to MassPort

Fireboat American United

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 Introduces 'Pride of Cassville'

100_4800_web.jpg

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


Performance by Design: Hydrodynamics for High-Speed Vessels

Performance by Design: Hydrodynamics for High-Speed Vessels

The new book “Performance by Design: Hydrodynamics for High-Speed Vessels” will be introduced on October 30 at the Fort Lauderdale International Boat Show, Donald L. Blount, founder of Donald L. Blount and Associates, announced. A limited number of books will be available at Booth 685


Ocean Ships, APT, Awarded DoD Contract Modifications

USNS Montford Point: Photo MSC

The US Department of Defense inform that Ocean Ships, Inc., and American Petroleum Tankers, have been awarded Military Sealift Command contract modifications for charter, operation and maintenance of vessels as follows: 1. Ocean Ships, Inc


MN 100: MetalCraft Marine Inc

Metal Craft 1.jpg

583 East Broadway Cape Vincent, NY 13618 Telephone: 613-542-1810 E-mail: info@metalcraftmarine.com Website: www.metalcraftmarine.com CEO/President: Tom Wroe Number of Employees: 150 The Company: MetalCraft Marine Incorporated is a fully integrated designer and manufacturer of custom high


MN 100: KRAL-USA, Inc.

KRAL_Volumeter.jpg

901A Matthews-Mint Hill Road Matthews, NC  28105 Telephone: 704 814 6164 E-mail: c.tschegg@kral-usa.com Website: www.kral-usa.com CEO/President: Christoph Tschegg Number of Employees: 6 The Company: KRAL manufactures 3-screw pumps and 2-screw flowmeters


Navy Autonomous Underwater Vehicle Delivery Milestone

Navy UAV LTV 38: Photo USN

Commander, Submarine Development Squadron 5 (CSDS 5), Detachment UUV, informs of the delivery of Large Training Vehicle 38 (LTV 38), an unmanned undersea vehicle (UUV), which makes LTV 38 the first UUV to join the vehicle inventory used by detachment UUV at Naval Undersea Warfare Center Keyport


Ulstein Adds ‘X-STERN’ to its Design Portfolio

An offshore vessel with the X-STERN has increased operability in harsh conditions

Ulstein Group introduced the X-STERN, a design feature increasing vessel operability through positive effects on station keeping, wave response, comfort and safety in harsh conditions. An X-STERN vessel can stay on position in harsh weather with the stern towards waves, wind and current


New Maximum Draft Restriction at Jaigarh Port

Jaigarh Port

Jaigarh Port authorities have advised that from today the post monsoon maximum permissible draft [at Jaigarh Port] shall be 13.5 metres with tide. The displacement restriction of 100000 Mts shall no more be applicable. For information about operations in India contact GAC India at india@gac


MOL Bulker is the First Built with Safer Hull

Bulk carrier of the type featuring the NSafe-Hull

Bulk carrier under MOL’s operation is world's first to adopt highly ductile steel plate to ensure superior collision safety Mitsui O.S.K. Lines, Ltd. (MOL) announced the world’s first use of highly ductile steel plate NSafe-Hull


Lerwick Harbor Handles Solan Field Storage Tank

  Lerwick Harbour has again demonstrated its deep-water capacity and capabilities,  this time by simultaneously accommodating two giant support vessels and the successful offloading of a 10,000 tonne subsea oil storage tank, destined for west of the Shetland Islands.


Mermaid Kohler Range to Be Launched

Kohler engine (image courtesy of Mermaid Marine)

Mermaid Marine is to launch a new range of diesel engines, the Mermaid Kohler. The partnership between U.K. diesel engine marinizer Mermaid Marine and Kohler expands Poole based Mermaid Marine’s offering to smaller inboard engines with the company now able to supply engines from 31kW to


Kvichak Delivers Vessel to NSEDC

Photo: Miguel Edwards

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


RN Aircraft Carrier Christened by Queen Elizabeth

Christening ceremony: Photo credit MOD

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


USCG Double Hull Tanker Rule Published

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


Thoma-Sea Launches Two TAI Designed Ships

Regulas (Photo: TAI)

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.


International Recognition for Fast Displacement Hull Form

Galactica Star

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






 
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