Marine jack-up type crane vessel and methods of operation

摘要

The present invention relates to a marine jack-up type crane vessel and a method of operation thereof. Aa hoisting crane is mounted to the hull, comprising a substantially hollow vertical column around which a slew bearing extends, guiding and carrying a boom connection member to which a boom is mounted. A topping winch is provided and an associated topping cable for pivoting the boom up and down. A hoisting winch and an associated hoisting cable are provided for hoisting a load. A revolving cable guide is arranged at a top of the column via an associated bearing structure. The topping winch is disposed such that the topping cable extends from the topping winch upward through the column to the revolving cable guide. The horizontal boom pivot axis is at a height with respect to the cargo deck exceeding 35 meters, and the revolving cable guide is at a height with respect the cargo deck exceeding 60 meters.