Matson Navigation & MAN Energy Solutions have signed a contract for the retrofit of the main engine aboard the Daniel K Inouye, a container ship in the Matson fleet. Constructed in 2018, MAN Energy Solutions’ after-sales division, MAN PrimeServ, will retrofit the 3,600 teu vessel’s MAN B&W 7S90ME-C engine to an MAN B&W 7S90ME-GI type capable of operating on LNG and fuel oil. The contract includes an option for a second vessel.As part of the retrofit solution, MAN Energy Solutions will also provide a Pump and Vaporizer Unit, the prefered high-pressure pump and vaporizer for MAN B&W ME-GI engines, which will be integrated into the Daniel K Inouye’s Fuel Gas Supply System. The PVU pressurises LNG to 300 bar and vaporises the liquefied fuel to gaseous form for supply to the main engine. Furthermore, its control system is based on that of the MAN B&W ME-GI engine and thus offers seamless integration and high performance in gas-mode.Post-retrofit, the Daniel K. Inouye is expected to continue to operate on trans-Pacific routes between the US West Coast and Asia from mid-2023.MAN Energy Solutions states that, as the lowest carbon-intensity fuel, operation on LNG is projected to reduce the Daniel K Inouye’s CO2 emissions by 24% with a maximum, guaranteed, ultra-low methane slip of between 0.20-0.28 g/kWh across the load envelope.