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Maritrans Secures Patent for Converting Single-Hull Tank Ships

Maritrans Inc. has obtained a patent on its proprietary process for rebuilding single-hull tank ships and converting them into double-hull vessels. With the most recent patent, Maritrans has now patented the double-hull conversion process for both barges and tank ships. The U.S. Oil Pollution Act of 1990, as well as the International Convention for the Prevention of Pollution from Ships (MARPOL), each require the retirement of single-hull tank vessels. In January of 2001, Maritrans announced that it had received the first of three patents for internal double-hull conversions of single-hull barges. These Maritrans patents involved pre-fabrication of large tank structures that are inserted into the existing hull, with a trunk deck extending above the pre-existing deck. The design allows double-hull conversion while preserving virtually all of the previous cargo capacity. Maritrans is currently completing its fifth barge rebuilding project using this patented process. This latest patent, for single-hull tank ships, addresses the unique design of these vessels. Maritrans utilized its computer-assisted modular design process, pioneered in the previous double-hull patents, to formulate an appropriate double-hull structure for tank ships. The patent differs from the previous barge patents in that it combines the addition of an inner bottom with external side modules. Maritrans also has other U.S

USCG Codifies Single Hull Phase-out Requirements

In a notice of proposed rulemaking (NPRM), the USCG proposes to clarify and codify a policy it issued in April 1999 regarding phase-out dates for single hull tank vessels. OPA 90 includes requirements for double hull tank vessels and phase-out schedules for all single hull tank vessels operating in U.S. waters. Tank vessel owners are required to remove single hull tank vessels from service on a specific date, depending on such factors as the vessel's gross tonnage, age and hull configuration

ExxonMobil Still Chartering Single Hulled Tankers

U.S. oil giant ExxonMobil continues to charter single-hull tankers for its oil, tanker brokers said on Thursday. ExxonMobil has been in the market for a five-year time-charter since late August, brokers said, and has recently been giving serious consideration to a single-hulled very large crude carrier (VLCC) that will be nearly 20 years old by the end of the charter in 2005. Negotiations, however, have recently reached a stalemate, brokers said.

Strategic Marine Launches Caballo Maya

Photo courtesy Strategic Marine

Strategic Marine has successfully launched the first of two 496 ft Dive Supports Vessels, Caballo Maya (Hull 156) in Vietnam. The vessel was launched on the 5th of April, 2010, with the second vessel (Hull 157) approximately 90% complete and eight weeks from completion. “We were originally awarded the contract for Hull 156 in late 2006, and were engaged to exclusively carry out the steel fabrication works on the vessel,” explained Managing Director Mark Schiller

Jotun to Offer Antifouling Coatings Guarantee


2011-05-02 – PRESS RELEASE: Jotun’s Hull Performance Solutions offers shipowners and managers who purchase Jotun’s silyl methacrylate SeaQuantum X200 a money back guarantee if the antifouling coating fails to deliver less than 1.5 per cent speed loss or a maximum 4.5 per cent increase in fuel consumption over a 60 months dry-docking interval. The Jotun Hull Performance Solutions guarantee is calculated on a transparent measurement and analysis tool

Flexibility Key to MES’ New FPSO Hull Platform

Japanese shipbuilder Mitsui Engineering & Shipbuilding Co., Ltd. (MES) announced it has developed a next generation hull platform for floating production, storage and offloading system (FPSO) that aims to offer improved flexibility between projects.   Offshore oilfields vary in environmental conditions and oil properties relative to geographical location, requiring shipyards to frequently change hull design and construction scheme to satisfy varying requirements for each project

Flexible Membrane Covers and Seals Damages

The Gulf Responder is a 45-ft. aluminum catamaran designed to operate in oil and hazardous chemical spills. Currently under construction at Scully's Fabricating in Louisiana, the vessel's expected delivery date will be either late January or early February. The 15-ton vessel is powered by twin turbo diesel engines with water jet propulsion and equipped with two 1,000 lb. MagnaPatch devices. The MagnaPatch is a patented pollution abatement device

Jurong Shipyard Skids Hull in Rig Construction

Jurong Shipyard Pte Ltd (JSPL), a subsidiary of SembCorp Marine Ltd has skidded the massive 14,000 ton upper hull of a $285 million semi-submersible rig over the lower hull. It is reportedly the first of its kind involving the skidding of such a heavy structure. It was conceived, designed and constructed over a two-year period. On April 11, 2001, JSPL in collaboration with associated company PPL Shipyard Pte Ltd (PPL) entered into a fixed price agreement with GlobalSanteFe Corporation

Simon Beale Elected Chairman of Joint Hull Committee

Simon Beale, underwriter of the KJ Coles syndicate at Lloyd's, has been elected chairman of the Joint Hull Committee (JHC). The JHC is a joint initiative by the International Underwriting Association of London and Lloyd's Underwriters' Association. Its role is to support and develop the role of the London hull insurance market. The JHC acts as a focal point for hull insurance issues while providing advice and representation to members on technical, legal, promotional and educational issues

Cathelco ICCP for Concept Jack-Up

Photo courtesy Cathelco Ltd.

Cathelco is supplying an ICCP hull corrosion protection system for a new type of jack-up vessel which is being constructed for Master Marine of Norway who specialize in the transport and installation of heavy structures for the offshore energy industry. The vessel, known as Service Jack 2, will initially be used to install wind turbines in the Sheringham Shoal Offshore Wind Farm which is located in the Greater Wash approximately 9 miles north of the town of Sheringham in Norfolk

Cadmatic Used for Alaska Ferry Design

The Alaska Marine Highway System (AMHS) has awarded the Alaska Class Ferry project to Vigor Alaska shipyard in Ketchikan, Alaska, where construction is currently underway. Providing production design for the ferry is Seattle-based naval architecture and marine engineering consultancy Glosten

Scripps Sells Oceanographic Research Vessel

New Horizon (Photo: Marcon International)

Purpose-built oceanographic research and survey vessel New Horizon has been sold from the Scripps Institute of Oceanography to private interests, announced ship broker Marcon International, Inc.   New Horizon will continue to work under her new ownership as a U.S

Escort Tug Launched for Bay-Houston Towing

H. Douglas M Courtesy Eastern Shipbuilding Group

Eastern Shipbuilding Group, Inc. announced the launch of the Escort Tug H. DOUGLAS M (Hull 236) for Bay-Houston Towing Company on November 17, 2015. This series of Robert Allan, LTD. (RAL) designed Z-Tech 2400 Class Terminal & Escort Tugs is currently under construction at Eastern’s

Seaspan Implements ECO Insight solution

ECO Insight

  Seaspan Ship Management Ltd. will implement the DNV GL fleet performance management solution ECO Insight to improve their fleet monitoring. ECO Insight will also enable Seaspan to increase their vessel’s performance and energy efficiency.

In-hull Dual Fuel Engine Conversion an Industry First

Coral Anthelia (Photo: Cat Marine)

To convert its vessel Coral Anthelia to dual fuel operation, Anthony Veder worked with Cat dealer Bolier to complete the industry’s first in-hull retrofit – saving considerable time and money in the process.    The project saw the retrofit of a marine diesel engine to dual

'Brodosplit' Delivery for Fincantieri Group

Courtesy Brodosplit  Shipyard

  By loading fitted sections (grand blocks), with more than 1450 tons of steel equipped with piping, ironmongery components and electric routing on a special cargo barge delivery was executed in Shipbuilding Industry Split Inc. on 5 November 2015.

Triton 1650/3 LP Introduced at Boat Show

New Triton Submarines 1650 -Low Profile- designed to Fit in a Superyacht Tender Garage

  Triton Submarines LLC, America’s leading builder of personal submersibles designed for yacht deployment, provided details of its new Triton 1650/3 LP (Low Profile) submersible model at a press conference at the Fort Lauderdale International Boat Show today

VARD Wins Offshore Vessel Order

Vard Holdings Limited, a designer and builder of offshore and specialized vessels, said it has secured a new contract for the design and construction of one offshore vessel for an undisclosed international customer. The new offshore vessel is designed by Vard Design in Ålesund, Norway

Car Carrier Runs Aground off Washington

Viking Emerald. Photo: Gram Car Carriers

The car carrier Viking Emerald got steering gear failure and ran aground off Woodland, Washington.    The vessel, owned by Norway’s Gram Car Carriers and managed by OSM Ship Management in Singapore, was refloated several hours later with the help of tugs, and resumed voyage

Ship Operating Costs to Rise Over Next Two Years

Drewry - total operating cost index (2000=100)(Photo: Drewry Maritime Research)

The cost of operating cargo ships is forecast to rise over the next two years after falling in 2015, according to the latest Ship Operating Costs Annual Review and Forecast 2015/16 report published by global shipping consultancy Drewry.  

Historic Vessel Laser Scanned for Hull Refit

Image: API Services

New York’s Lake George Steamboat Company recently commissioned API Services to laser scan the hull the oldest boat in its fleet, the 107-year-old Mohican.   The original Mohican, in service from 1894 to 1907, was a 93-foot wooden hull vessel

Foreship: New CFD Methodology

flyer_bowshot WEB.jpg

In the quest to model real conditions faced by ships at sea for design purposes, earlier this summer Foreship unveiled details of a live project that has factored real sea states into CFD-based hull form optimization. The company reports that the results of ‘in wave’ analysis had

Eastern Launches Harvey Sub-Sea

Image: Eastern Shipbuilding

Eastern Shipbuilding Group launched M/V Harvey Sub-Sea (Hull 249) for Harvey Gulf International Marine, Inc. M/V Harvey Sub-Sea is a first of two (2) 340 ft. Class Multi-Purpose Service Vessels (MPSV), designed by VARD Marine. M/V Harvey Sub-Sea will feature a 250MT AHC Knuckle Boom Offshore Crane

Chesapeake Inks Deal: 3 Tugs for Vane Brothers

Chesapeake Shipbuilding Corp. signed another contract with Vane Brothers of Baltimore to build three more ocean going tugs. This new contract marks the 15, 16 and 17th tugboats built for Vane Brothers by Chesapeake Shipbuilding since 2008. Construction on the first new tug has already begun in one

Hard Problems Demand Soft(ware) Solutions


Make no mistake, the commercial maritime industry will always revolve around heavy duty machinery and mega-machines designed to weather some of the toughest operating conditions on earth. But in recent years a proliferation of Software Solutions has evolved to help the machines operate more

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