Löftefartöy samt fremgangsmåte for posisjonering, löfting og håndtering av et plattformdekk og et plattformunderstell

摘要

A lifting vessel (1) consisting of a lower U-shaped pontoon foundation (2a, 2b, 2c), a number of vertical columns (5) attached to the pontoon foundation and extending upwards and through the water surface, and each column (5) being free-standing above the pontoon foundation (2a, 2b, 2c). Methods for positioning, lifting and handling of a platform dock and a platform jacket is also described.