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Stern Tube

Mobdock Facilitates Onsite Underwater Ship Repair

hydrex mobdock.jpg

In February, Hydrex diver/technician teams carried out underwater stern tube seal repairs on a 139-meter container vessel in Port Everglades, Fla., close to the company’s office in Clearwater. The vessel was suffering from an oil leak, making a fast repair necessary. Using one of the company’s next generation flexible mobdocks the team was able to carry out the entire operation onsite and underwater, saving time and money for the owners. Hydrex said it constantly invests in the research necessary to continue to evolve repair techniques and procedures. Over the years the Hydrex R&D department has constantly improved the flexible mobdock (mobile mini drydock) technique to make it possible for Hydrex diver/technicians to perform permanent repairs on seals, thrusters and almost any other part of the underwater vessel without the vessel needing to go to drydock. Hydrex said its latest generation of flexible mobdocks allows it to carry out the replacement of virtually any type of stern tube seals very quickly onsite. These flexible mobdocks are stored at the fast response centers. Designed specifically to increase speed of service, these centers are equipped with all the latest facilities, lightweight equipment and tools. This allowed us to mobilize a team together with all the needed equipment to the container vessel’s location within the shortest possible time frame.


RSC Gear Oils Gain Blohm, Voss Approcal

Photo: RSC

RSC Bio Solutions EnviroLogic 210 and EnviroLogic 215 readily biodegradable and non-toxic gear oils have passed the stringent performance requirements of Blohm. After significant testing, in both static and dynamic evaluations, these synthetic, high-performance products have met the requirements for two of Blohm + Voss Industries’ patented Simplex-Compact sealing systems: the “Standard” Seal and the “Airspace” Nonpolluting Seal.


Iconic Schooner Fitted With Pollution-free Bearings

Bluenose ll: Photo credit Thordon Bearings Inc.

Nova Scotia’s sailing ambassador, 'Bluenose II', fitted with Thordon Bearings' water-lubricated stern tube & rudder bearings. Nova Scotia’s sailing ambassador, the Bluenose II, relaunched September 29, 2012 in Lunenburg, Nova Scotia fitted with pollution-free water lubricated stern tube and rudder bearings.  The extensive two-year $15.9 million restoration work was done by the Lunenburg Shipyard Alliance, made up of Covey Island Boat Works


Hydrex Underwater Repairs in Trinidad

Photo: Hydrex

Last month a Hydrex diver/technician team carried out underwater stern tube seal repairs on a 148-meter container vessel in Port of Spain, Trinidad. The ship was suffering from an oil leak, making an on-site repair necessary. Using one of the company’s flexible mobdocks the team was able to carry out the entire operation on-site and underwater, saving the owner an expensive and time-consuming trip to drydock.


Thor-Lube Bearing Receives Orders

Thordon Bearings Inc. of Canada recently received orders for environmentally friendly Thor-Lube sealed stern tube bearing systems for three LNG carrier newbuild projects in Korea and Japan. Daewoo Shipbuilding & Marine Engineering Co. Ltd ordered systems for two ships, one for Shell International Gas Limited and the second for the Australian LNG Ship Operating Co. (ALSOC). Mitsubishi Heavy Industries (MHI) of Japan ordered the third system for a second Shell newbuild


Emergency On-site Repairs Keeps Vessel Sailing

Photo courtesy of Hydrex

Hydrex offers fast on-site repairs in emergency situations. Its fast response team are ready to mobilize immediately to locations around the world for a wide range of operations.   There are many events that can stop a ship from sailing. Ships with a leaking stern tube are often not allowed to enter ports. A vessel can be tied up after a collision or a malfunctioning rudder can prevent safe maneuvering. Going to drydock is obviously not an option in such cases


Chevron Introduces New Line: Clarity Synthetic EA Oils

Chevron Products Company, a Chevron U.S.A. Inc. division, unveiled a new line of Clarity Synthetic EA Hydraulic and Gear Oils for the marine industry and other applications where leaks or accidental discharge are a concern. These products meet the new EPA Vessel General Permit (VGP) requirements for environmentally acceptable lubricants (EALs). Clarity Synthetic EA Hydraulic and Gear Oils are designed to give maximum protection and provide seal compatibility in hydraulic equipment and


Don't Forget the Diver: Avoid Drydock Repairs

Hydrex Logo

Hydrex reminds that their turnkey underwater repair solutions for shipowners can be done wherever and whenever they are needed. Hydrex’s multi-disciplinary team promises will help to find the best solution for any problem encountered with a vessel below the water line. They will immediately mobilize thier diver/technicians to carry out necessary repair work without the need to drydock. The company has a long track record of performing complex permanent underwater repairs to thrusters


BAE San Francisco Wins Navy Contract

BAE Systems San Francisco Ship Repair, San Francisco, Calif., is being awarded a $12,257,163 firm-fixed-price contract for a 55-calendar day regular overhaul and dry-docking of Military Sealift Command's dry cargo/ammunition ship USNS Alan Shepard.  Some of the major work items include dry-docking and undocking the ship, repairing interior decks, structural repairs, overhauling the main diesel generators, and inspecting and refurbishing the propeller shaft and stern tube


Taiwan Ferry Propulsion Package Contract For MAN

MAN L32/44 Engine: Photo credit MAN

Lienchiang County Government of Taiwan ordres two 9L32/44CR four-stroke engines to power a inter-island new Ropax ferry. The medium-speed engines will form part of a complete propulsion system delivered by MAN Diesel & Turbo that also includes reversible gearboxes, MAN Alpha twin-screw fixed-pitch propellers and a ship alarm system.
 The 106-metre ferry will be built by Jade Shipbuilding, Kaohsiung, SW Taiwan and will travel six days a week between Keelung and the Matsu islands (an


Dynaligner Aims to Eliminate Shaft Misalignment

Dynaligner (Eric Haun).jpg

A Swedish and Dutch invention aims to eliminate misalignment, modernizing today’s shaft alignment practice. The Dynaligner is said to offer trouble free operation of marine propulsion trains, irrespective of ship operation condition or hull deflections


IHC Seals Earn DNV GL Verification

IHC Sealing Solutions has received an important third-party verification from DNV GL, a  ship and offshore classification society. This means that the company’s Supreme Ventus and Supreme Athmos seals (that guarantee zero oil emissions) are now compatible with mineral oils that are used


BAE Systems Gets USNS Wally Schirra Overhaul Contract

USNS Wally Schirra: Photo MSC

U.S. Department of Defense announces the award of a Navy US$10,354,523 contract to BAE Systems San Francisco Ship Repair, San Francisco, California, for work on the USNS  Wally Schirra (T-AKE 8). The firm-fixed-price contract is for a 58-calendar day regular overhaul and dry docking


RSC Bio Solutions, AEGIR-Marine Begin EAL Partnership

foto rsc-aegir web.jpg

RSC Bio Solutions & AEGIR-Marine announce their strategic partnership in the field of stern tubes seals working for EALs under VGP AEGIR-Marine and RSC Bio Solutions recently signed a partnership confirming their collaboration concerning stern tube seals running on readily biodegradable


The ABCs of EALs for the EPA’s VGP

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How Ester-Based Oils Handle Hydrolysis to Remain the Top EAL for VGP When the Environmental Protection Agency (EPA) issued the new Vessel General Permit (VGP) in December 2013, lubricant and fluid manufacturers were prepared to give vessel owners a number of environmentally acceptable lubricants


Hydrex Divers Perform Underwater Repair

Photo: Hydrex

A Hydrex diver/technician team carried out underwater stern tube seal repairs on a 157-meter dredger in Montevideo, Uruguay in April. The ship was suffering from an oil leak, making an on-site repair necessary. Using a Hydrex flexible mobdock the team was able to carry out the entire operation


Total Lubmarine Celebrates Naming of Trafuco 7

Photo: Total Lubmarine

New barge operated with company’s biolubricants outlines commitment to environment and ship operators in Belgium Marine lubricant provider Total Lubmarine has welcomed the naming of the newest addition to its fleet, Trafuco 7. The naming ceremony for the newly-built vessel took place at


High-Tech Fishing Vessel Delivered with MAN Propulsion

Fishing vessel Herøyhav: Photo courtesy of MAN

Norwegian company Herøyhav AS has taken delivery of a 69.95-m trawler/purse seiner from Karstensens Shipyard, Denmark, equipped with a propulsion package supplied comprising a MAN 9L27/38 engine and a two-speed reduction gear that drives a MAN Alpha 4,200 mm diam. ducted propeller


DNV Introduce Vessel General Permit Enviro-Oil Advisory Service

Photo courtesy of USCG

Classification society and consultancy DNV GL inform it has introduced the "Environmentally Acceptable Lubricants" (EAL) Report Service to help ship operators to comply with the new rules set out for the US Vessel General Permit (VGP) without the need for extensive outlays


LUKOIL Marine Debuts EAL Generation

Due to new U.S. regulations, almost all ships exceeding 24 meters in length which are operating in U.S. coastal waters are confronted with much stricter environmental protection requirements. The Vessel General Permit (VGP), in effect since December 19, 2013


Hydrex, Wärtsilä Partner for Subsea Repair

Photo: Hydrex

Last month a Hydrex diver/technician team carried out underwater stern tube seal repairs on a 110-meter offshore supply vessel in Bunbury, Australia. The rope guard covering the stern tube seal assembly was missing and the seal box had come loose after a mooring rope got tangled around the assembly


Don’t Forget: Seawater is a Free EAL

Typical netting and rope around rotating shaft damages aft seal.

If your vessel is trading in U.S. waters, you need to be aware of the new oil to sea interface law that comes into effect on Dec. 19, 2013.  According to the new U.S. Environment Protection Agency Vessel General Permit (VGP), all vessels built on or after Dec


EPA’s Vessel General Permit (VGP) & You

Nothing stirs the maritime pot like new regulation, and coming soon to you (in less than a month) is the new iteration of the Vessel General Permit (VGP). The VGP applies to vessels operating in a capacity as a means of transportation, that have discharges incidental to their normal operations


Fast Ferry Gets a New Power Package

Seastreak’s Wall Street  Repower Synopsis  Installed power:	Reduced from 5696 kW 		to 3680 kW (35%)   Fuel consumption:	Reduced 30%  	(est. $500,000/year)  Weight:	Reduced 15 tonnes  CO2 emissions:	Per-passenger  value halved

While many owners discuss ideas to suitably maintain maritime service while slashing operating costs, Seasteak LLC, owners a 43m fast ferry Wall Street, put words into action with a dramatic propulsion switch that saw the company maintain sailing schedule and speed while reducing fuel consumption


Wärtsilä Offer Tempting Menu at Marintec China 2013

A Wärtsilä China facility: Image courtesy of Wärtsilä

A model of the hi-tech WSD 1000 MPSV, a multi-purpose offshore supply vessel with a unique fuel-efficient design, proven hull lines & an integrated equipment package from Wärtsilä, will be on display at the upcoming Expo. In addition to this and other exhibits






 
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