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 March 2015 Digital Edition
FREE Maritime Reporter Subscription
Latest Maritime News    rss feeds

People & Company News

Drydocks World & Maritime World Win IMC Excellence Awards

Drydocks World and Maritime World have won the Excellence Award given by the International Maritime Club at the Golden Bells Awards 2015 - Middle East where

Ocean 3 launched at the AGCT, Rijeka

China Shipping Container Line’s (CSCL) Xin Qin Huang Dao recently made its maiden call at the Adriatic Gate Container Terminal (AGCT), International Container Terminal Services, Inc.

Rolls-Royce Propulsion Package for Polar Ship

  Rolls-Royce has been awarded a contract by ship builder Fincantieri to supply a fully integrated propulsion system for Norway’s new Polar Research Vessel,

Technology

Drydocks World & Maritime World Win IMC Excellence Awards

Drydocks World and Maritime World have won the Excellence Award given by the International Maritime Club at the Golden Bells Awards 2015 - Middle East where

US Navy to Roll out Underwater Spy Satellites

The robotic series that remade crusade in skies will shortly extend to a low sea, with underwater view “satellites,” drone-launching pods on a sea building and unmanned ships sport submarines,

India May Add Japanese Soryu-Class Submarines to its Fleet

India is reportedly considering a project to incorporate six Japanese Soryu-class diesel-electric submarines into its fleet, says The Japan Times.   The Defense

Bulk Carrier Trends

Emission Control to Cost Additional $100 bln for Shipping Lines

The implementation of a global sulfur cap slated for 2020 is estimated to add an additional $50-100 billion to the shipping industry's annual fuel bills, Lloyd's List reports.

First Supramax Vessel for Japan-Italy Venture

'DACC Tirreno' was delivered at the Oshima shipyard in Japan yesterday, the first of four Supramax bulk carriers for the dACC Maritime Limited fleet, the joint

Ukraine Arrests Turkish Ship for Visiting Crimean Port

Turkey owned merchant ship flying the flag of Tuvalu was arrested by Ukrainian authorities over a visit it made to a port in Crimea, reports Reuters. The ship's captain detained.

Salvage

Smoke: Cruise Ship Evacuates Passengers

A number of passengers and crew members were evacuated after smoke was spotted billowing from the front section of Carnival Liberty cruise ship docked in the Dutch Caribbean nation of St Maarten.

Salvage, Wreck Removal Beset with Chronic Problems

The basic nature of maritime casualties, salvage and wreck removal has evolved rapidly over the last few years. Ships and offshore constructions have become more technologically elaborate,

EALs & Oil Spill Remediation

EALs & Oil Spill Remediation: The Effects of EALs on Oil Spill and Discharge Reporting and Remediation In the wake of increased environmental scrutiny and potentially expanding liability issues,

Casualties

Scandlines Ferry Back in Service by End June

The damaged Scandlines ferry M/V Prinsesse Benedikte is being repaired at the Polish shipyard Remontowa and is expected to be ready before the end of June 2015.

USCG Flush Ice down River Systems to Facilitate Shipping

The Coast Guard cutter fleet is flushing ice through the Great Lakes river systems to prevent ice jams and facilitate commercial shipping as the shipping season

Greek Ferry Still Stuck

The Greek ferry that ran aground just outside of port on the Aegean Island of Kassos Wednesday night is still stuck. The 227 passengers and 55 crew aboard the

Marine Materials

Schmiedag and Wildauer Schmiedewerke: 'We Forge Partnerships'

Olaf Wiertz, Sales Director at Schmiedag GmbH (SDG) and Wildauer Schmiedewerke GmbH & Co. KG (WSW) said: “We are more than just a supplier to our customers – we are their partner.

Dometic’s Workboat Play

Workboat operators are taking a second look at Dometic’s SeaXchange Reverse Osmosis Systems as missions expand and demands on these vessels increase. It’s no secret

Affordable SATCOM for Workboat Applications

SATCOM edges closer to providing standardized services to the workboat sector. It’s affordable now and someday soon, you won’t be able to afford to be without it.

 
 
Maritime Careers / Shipboard Positions Maritime Security Maritime Standards Naval Architecture Offshore Oil Pod Propulsion Ship Electronics Ship Repair Ship Simulators Winch
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: 0.2036 sec (5 req/sec)