A World’s First in Underwater Repair:

press release
Wednesday, January 04, 2012

The insertion of a complete, prefabricated replacement hull section in a badly damaged ship at anchor. 
 
 

On Friday 22nd July, 2011 the Tsavliris Salvage Group urgently dispatched salvage tug Stevns Battler in response to a call for assistance from bulk carrier Navios Sagittarius (GRT: 38,849, DWT: 75,756), laden with 73,419 metric tons of iron ore pellets. The Sagittarius had run aground on the Tonneberg Banke, about 23.5 miles east of Frederikshavn, Denmark, while on passage from Finland to China. The salvage team arrived the same day and prepared a refloating/salvage plan, incorporating environmental and safety measures. On July 26th, a salvage plan was approved by the Danish authorities and on July 28th, after about 3,000 tons of cargo had been transferred to the lightering vessel, by pressurizing certain tanks and with the assistance of tugs, the Sagittarius was refloated.

 

On the 23rd of July, a Hydrex diving team contracted by the salvors had carried out a preliminary video inspection which found large penetrations, indentations and cracks in the hull, and heavily deformed plates. However, it was impossible to get a full picture of the damage with the ship still aground. The vessel was then towed to Frederikshaven for a detailed underwater inspection, extensive bottom repairs, and reloading of cargo.

Detailed inspection


With the Sagittarius refloated it was possible to carry out a detailed inspection of the hull and note all damage. Tsavliris had signed a Lloyd’s Open Form salvage contract with Navios and subcontracted several companies to carry out inspection and repairs. The chief subcontracting company for the inspection, planning and repair work was Hydrex. Tsavliris had previously contracted Hydrex to carry out a stern tube replacement on the bulk carrier Minoan Euro in Manila. Captain George Polychroniou, Tsavliris’ Operations Manager overall in charge of both salvage projects confirmed that, “The cooperation with Hydrex was excellent in both operations.” This was particularly important in a complex salvage operation which lasted three months and for which Hydrex mobilized 24 divers full time, in two shifts, for the duration of the operation, under the technical directions of Tsavliris naval architects and salvage master. The Hydrex team of 24 full-time divers was organized and assembled by Onno De Nooijer, Technical Services Officer for Hydrex in Antwerp, Captain Barend Visser, Tsavliris Salvage Master and Michalis Chourdakis, Tsavliris Technical Consultant, and headed up initially by Toon Joos, one of Hydrex’s most experienced diver/welders, who was able to provide much technical input and assistance to the naval architects during the planning stages. Toon was later replaced by Jan Botte who successfully led the Hydrex divers for the majority of the repair operation.

 

Thus it was Hydrex divers who examined the hull, took measurements and photographed and videoed the damage. They reported two very large holes in the hull, one about 5 x 5 meters aft on the port side and the other about 8 x 1.8 meters near the forepeak on the port side, as well as many smaller holes, cracks and indentations. The damage was very severe indeed.
 

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

People & Company News

Dool to Serve as Chair of SLSMC Board

The St. Lawrence Seaway Management Corporation (SLSMC) announced that Tim Dool has been named as Chair of the Board of Directors, effective September 1. Dool was

Bollore First Half Boosted by Transport, Advertising Unit

French industrial group Bollore said first-half operating income rose 11 percent to 314 million euro because of strength at its transport business and advertising agency Havas,

Scrap Metal Exporter Pens Terminal Agreement

Port Canaveral Scrap Terminal LLC (PCST), a bulk ferrous scrap exporter, has signed a lease with the Canaveral Port Authority to operate a terminal in the north cargo area at Port Canaveral.

Technology

BMT WBM to Showcase TUFLOW at World Bank Seminar

BMT WBM ( (BMT), a subsidiary of BMT Group Ltd, a leading international engineering and risk management consultancy, is delighted to announce that it will be presenting

Senator Kaine Tours NNS Apprentice School

Huntington Ingalls Industries (HII) apprises that it has hosted Sen. Tim Kaine, D-Va., for a tour of The Apprentice School at the company's Newport News Shipbuilding division.

Rosneft Restores Meteorological Observations System in Kara Sea

As part of a large-scale summer Arctic research expedition "Kara-Summer - 2014" a meteorological station was installed that meets the latest modern requirements for such equipment,

Bulk Carrier Trends

Scrap Metal Exporter Pens Terminal Agreement

Port Canaveral Scrap Terminal LLC (PCST), a bulk ferrous scrap exporter, has signed a lease with the Canaveral Port Authority to operate a terminal in the north cargo area at Port Canaveral.

US Rail Jams Force Rush to Roads and Rivers

U.S. coal-burning power utilities are being forced to turn to barges and more expensive trucks to move coal, desperate to shore up stockpiles left dangerously low

Latest Ocean-Going Shipbuilding Orders

Clarkson Hellas notes in its latest 'S&P Weekly Bulletin' shipbuilding orders placed in the dry bulk, tankship, gas carrier and containership sectors, as follows: Dry

Salvage

Ferry Runs Aground in Lynn Harbor

Ferry Cetacea ran aground about a quarter of a mile from the pier in Lynn Harbor, Massachusetts yesterday, with 13 passengers and four crew aboard, the U.S. Coast Guard (USCG) reported.

Coast Guard Responds to Capsized Tug in Chicago

The Coast Guard is responding to the capsizing of a tug on the Calumet River near the 106th St. Bridge in Chicago in which two crew members were able to escape and swim to shore.

Crippled Pine Galaxy Arrives in San Francisco

The disabled mixed-products tanker Pine Galaxy arrived in San Francisco for repairs Wednesday. Commercial tugs towed the ship safety into the Port of San Francisco

Casualties

Coast Guard Responds to Capsized Tug in Chicago

The Coast Guard is responding to the capsizing of a tug on the Calumet River near the 106th St. Bridge in Chicago in which two crew members were able to escape and swim to shore.

Crippled Pine Galaxy Arrives in San Francisco

The disabled mixed-products tanker Pine Galaxy arrived in San Francisco for repairs Wednesday. Commercial tugs towed the ship safety into the Port of San Francisco

Tugboat Capsizes Near 106th Bridge, Chicago

The Coast Guard informs it is responding to the capsize of a tug on the Calumet River near the 106th St. Bridge in Chicago, in which the two crew members were able

 
 
Maritime Contracts Naval Architecture Offshore Oil Pod Propulsion Port Authority Ship Electronics Ship Repair Ship Simulators 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: 0.2188 sec (5 req/sec)