This doesn't make a lot of sense since passenger vehicles use low sulfur diesel while cruise ships don't > Ultra-low-sulfur diesel (ULSD) is a standard for def

This doesn't make a lot of sense since passenger vehicles use low sulfur diesel while cruise ships don't > Ultra-low-sulfur diesel (ULSD) is a standard for defining diesel fuel with substantially lowered sulfur contents. As of 2016, almost all of the petroleum-based diesel fuel available in the UK, mainland Europe, and North America is of a ULSD type.