Well, sure, it's good for ships too. In general powering a large ship has a much more generous performance envelope. Thus, "bunker oil". Ammonia is better than

Well, sure, it's good for ships too. In general powering a large ship has a much more generous performance envelope. Thus, "bunker oil". Ammonia is better than bunker oil and it's also better than compressed elemental hydrogen, for powering any machine that moves.