Who specifies the number of oars that must be carried in a motor-propelled open lifeboat on a cargo vessel?

The correct choice is that the manufacturer specifies the number of oars that must be carried in a motor-propelled open lifeboat on a cargo vessel. Manufacturers design and produce lifeboats in compliance with specific regulations and standards, which include guidelines on safety equipment. This ensures that the lifeboats meet statutory requirements and that they are equipped with the necessary gear for safe operation.

While other parties, such as the vessel owner, the USCG, and the ship captain, play essential roles in the management and operation of the vessel, the specific technical details about the lifeboat's design, including the requisite number of oars, are determined by the manufacturer. The USCG sets overarching regulations for safety on vessels, and the owner would ensure that these regulations are met, but they do not directly specify technical equipment details. The captain is responsible for the operation of the vessel and its safety but relies on the adherence to guidelines established by manufacturers and regulatory bodies.