Abstract: This invention relates to a crane vessel (1, 100) comprising a revolving hoist crane (20, 120) and a method of using such a vessel. The hoist crane comprises a jib (24, 124), main hoisting means and auxiliary hoisting means for raising and lowering a load. The main hoisting means comprise a main hoisting tackle (3, 130) with a main hoist upper block (38, 138) connected to the jib of the hoist crane and a main hoist lower block (39, 139). The vessel comprises a jib rest (10, 110) for supporting the jib when the crane is not in operation. According to the invention the main hoist lower block is assembled from a sheave block (163) comprising the sheaves (132) of the main hoist lower block and a load attachment assembly (133) comprising the lowering weight (137) and the main load attachment device (34, 134).