Page 58: of Maritime Reporter Magazine (April 2019)

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TECH FILES

Double Duo Lift Method:

Scaldis lifts Norwegian Frigate out of Fjord

SCALDIS, the Belgian subsidiary marine called on the expertise of SCAL- 7,300 tonnes at its disposal. ly out of the water, it was transported of DEME, Jan De Nul Group and Her- DIS and BOA Offshore to salvage the This made it possible to lift the 133-me- while hanging from the crane hooks of bosch-Kiere, in cooperation with BOA shipwreck. tre long and 5,500-ton heavy frigate in the heavy lift vessels to the nearest port,

Offshore, completed the salvage of the Especially for this project, SCALDIS one piece. In fact, the synchronous func- where it was placed on a submersible

Norwegian frigate KNM Helge Ingstad. developed a revolutionary lift method tioning of the four cranes allows to lift pontoon.

SCALDIS developed a revolutionary by combining its two heavy lift vessels: the wreck in one continuous operation This partially submerged pontoon was lift method especially for this project, Rambiz, equipped with two cranes and a and to move it into a horizontal position. subsequently de-ballasted, allowing it by combining its two heavy lift vessels total lifting capacity of 3,300 tonnes, and Missiles and fuel were removed from to re-emerge above the waterline while

Rambiz and Gulliver. the new heavy lift vessel Gulliver, also the frigate during the winter months supporting the Helge Ingstad at its cen-

On November 8, 2018, the Norwegian with two cranes and a total lifting ca- while divers installed 16 hoisting chains tre. During this operation, the hoisting frigate collided with the tanker Sola TS pacity of 4,000 tonnes. With this unique under the wreck to be able to lift the ship cranes stabilised the ship until all sea- in the vicinity of Bergen and sank on the “Double Duo Lift” method, SCALDIS out of the water. fastenings had been secured for subse- inclined slope of a fjord. The Norwegian has a combined total lifting capacity of To lift the frigate safely and complete- quent transport.

Photo Credit: © NORSK SJØFORSVARET 58 Maritime Reporter & Engineering News • APRIL 2019

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