Vessel for the transport of liquefied gas and method of operating the vessel

A method for the transport of liquefied gas, comprising:

• transporting liquefied gas in a vessel, the vessel comprising:
• a hull,
• at least one cargo storage tank arranged in the hull for storing liquefied gas,
• at least one engine to propel the vessel;
• receiving boil-off gas at a compressor inlet of at least one compressor, the compressor inlet connected to a vapour space of the at least one cargo storage tank, at a first pressure (P1);
• using the compressor to supply pressurized boil-off gas to the at least one engine at a second pressure (P2) exceeding the first pressure;
• diverting at least part of the pressurized boil-off gas to a boil-off gas recovery system for recovery of boil-off gas;
• recondensing the at least part of the pressurized boil-off gas in a cooling section of the BOG recovery system to provide recondensed pressurized boil-off gas;
• storing the recondensed pressurized boil-off gas in at least one recovery tank, wherein the recovery tank having a total volume for storing the recondensed pressurized boil-off gas being in the order of about 0.5% to 5% of the total volume of the at least one cargo tank.