Question 312Safety & Environmental - Assistant Engineer

The correct answer is D) official number. When off-loading garbage to another ship, the records must identify that ship by its official number. This is in accordance with regulations set forth by the US Coast Guard for the proper documentation and tracking of waste disposal from vessels. The official number is a unique identifier assigned to each vessel, which allows the authorities to verify the identity of the receiving ship. The other options (operator's name, home port, master's name) are not required for this specific documentation requirement.