Environmental impact of HTS propulsion and battery storage during port approach

With increasing interest and stricter regulation on air quality the perspectives of zero-emission sailing during port approach is explored. As a case study the feasibility of zero - emission port approach with normal or superconductive electric propulsion, battery systems on board and in tugs as well as the possibilities for shore power supply is explored. The emission savings are considerable and battery sizes are feasible. The efficiency of HTS motors is a welcome contribution, but may be more attractive in tugs than in all electric container ships.