The initial design for a new ammonia bunkering articulated tug-barge (ATB) has been granted approval in principle (AIP) from classification society the American Bureau of Shipping (ABS).The partners behind the project, including ABS, A.P. Moller – Maersk A/S, Fleet Management Limited, Georgia Ports Authority, Maersk Mc-Kinney Moller Center for Zero Carbon Shipping (MMMCZCS)