CARB’s regulations require engines to have equipment that has not been thoroughly tested at sea, nor inspected by the United States Coast Guard. It is common for this type of equipment on trucks and farm equipment to create significant heat and severe back pressure on engines, and at times, catch fire. Blocked exhaust systems may be manageable on land, but not at sea. Passengers could be adrift at sea for hours as boat crews try to recover the system. In high winds and sea, failed engine would risk the lives of passengers and crew.