Underwater Bow Thruster Removal

Press Release
Tuesday, March 26, 2013
Photo: Hydrex

A Hydrex diver/technician team mobilized to Rotterdam last month to remove the bow thruster of a 300-meter container vessel. The unit needed to be overhauled. Hydrex performed the operation underwater using the company’s own workboats based at the Antwerp depot. This made it possible for the owner to keep his vessel out of drydock.

The team mobilized from the Hydrex headquarters in Antwerp after all basic preparations had been made and the needed equipment was loaded onto one of the Hydrex workboats. The Hydrex catamarans are fully equipped as dive support stations with hydraulic cranes, winches, nautical and communication equipment and a dive control room. They can be used for a wide range of operations in Belgium, the Netherlands, the United Kingdom and France, permitting even more rapid deployment from the Antwerp depot. This increases flexibility of operations and helps to keep costs down for the client.

After they arrived in Rotterdam, the divers installed flexible mobdocks on both sides of the thruster tunnel. Next they emptied all water from the tunnel. This created a dry working area around the bow thruster unit. The team could then detach the bow thruster blades one by one.

The blades were replaced by a blind flange to prevent oil leaking from the thruster and water from ingressing. Next the diver/technicians removed the flexible mobdocks again, concluding the first part of the operation.

The following step was to secure the gearbox with hoisting equipment. The team then disconnected the bow thruster unit from the engine room and lowered it onto a cradle. This cradle was designed especially for thruster operations. It can be adjusted to the size of the unit. In this manner the thruster is prevented from tipping over and Hydrex divers can remove the unit in one take.

The bow thruster was then brought onboard the Hydrex workboat, ready to be overhauled. Next the team securely sealed off the engine room by positioning a flange over the space connecting the thruster tunnel to the room. This allows the vessel to sail until the overhauled unit is reinstalled.

With the bow thruster unit on deck the team sailed back to the Hydrex headquarters. From there the unit was transported to the manufacturer to be overhauled.

Performing a job like this on a tight schedule takes a lot of planning. This can only be done successfully by staff who have familiarity with such operations and the relevant know-how and equipment. Hydrex has a technical department capable of executing all the required planning. Our diver/technicians are trained and qualified to perform the full range of required class-approved repair procedures in even the harshest conditions. Hydrex also has very well-equipped rapid response centers including customized workboats, ready to mobilize directly to the job site. This saved the owner precious time and money.
 

  • Photo: Hydrex

    Photo: Hydrex

Maritime Reporter June 2014 Digital Edition
FREE Maritime Reporter Subscription
Latest Maritime News    rss feeds

Technology

SHIPPINGInsight 2014 Agenda Announced

Annual Conference, Exhibition and Networking Event Brings Together Shipowners and Technology Companies to Address Practical Solutions for Efficient Operations The

VIDEO: HMS Queen Elizabeth Floats Out

A timelapse video of HMS Queen Elizabeth floating out of her dock for the first time is now available at http://www.youtube.com/watch?v=P0ZjQz9vEKw. The float out of the 65,

Hyundai Heavy Industries Develops HiCASS

Hyundai Heavy Industries Co., Ltd. (HHI) announced today that it developed Hyundai Intelligent Collision Avoidance Support System (HiCASS) for the first time in

Ship Repair & Conversion

Hyde Marine Makes BWTS Installation Agreements

Hyde Marine, Inc., a wholly owned subsidiary of Calgon Carbon Corporation, says it has established two partnership agreements for installation of the chemical-free

MAN Extends High Speed Power Range

MAN announced it will present a newly developed 12-cylinder V-engine for use in working vessels at the SMM 2014 trade fair in Hamburg, Germany. The German engine

Germany as a Maritime Location Endangered: VDR

Germany, which currently is home to the world’s biggest container vessel fleet, will in future have fewer small shipping firms as European banks avoid the industry

Subsea Salvage

Sunken WW II Ship Oil Leak Plugged

Atlantic Coast Marine Group, Inc. successfully responds to World War II era motor tanker leaking massive cargo of oil into the Atlantic Ocean's waters. Beaufort,

Treasure Hauled from SS Central America Shipwreck

Odyssey Recovers Over 13,500 Silver and Gold Coins as Well as Gold Ingots, Dust, Nuggets and Jewelry From SS Central America Shipwreck; Newly Released Inventory

Costa Concordia Refloated

The wreck of the luxury liner Costa Concordia was refloated on Monday and will soon be towed away and broken up for scrap, more than two years after it capsized off the Italian coast,

 
 
Maritime Contracts Maritime Standards Navigation Pipelines Pod Propulsion Salvage Ship Electronics Ship Repair Shipbuilding / Vessel Construction Sonar
rss | archive | history | articles | privacy | terms and conditions | contributors | top maritime news | about us | copyright | maritime magazines
maritime security news | shipbuilding news | maritime industry | shipping news | maritime reporting | workboats news | ship design | maritime business

Time taken: 0.1193 sec (8 req/sec)