Patent ID: 8739719

Claim:
A method for operating an LNG fuelled marine vessel, which marine vessel comprises a propulsion system, a power plant and an LNG storage tank, in which method LNG is supplied as a gas fuel from the LNG storage tank to the power plant, and in which method the marine vessel is refuelled at a bunkering facility, wherein the marine vessel deploys a fixed LNG storage tank on board the marine vessel, the marine vessel deploys a removable LNG storage tank on board the marine vessel, and the removable LNG storage tank is removed and replaced by another removable LNG storage tank at the bunkering facility, and wherein the removable LNG storage tank is connected to the fixed LNG storage tank when the removable LNG storage tank is deployed on the marine vessel so that the LNG can be transferred from the removable LNG storage tank to the fixed LNG storage tank.