Matches and lighters are prohibited on vessels handling Class 1 explosive materials except in a designated area. In accordance with U.S. regulations who may designate this area on the vessel?

Correct Answer: Option D — the Master or the COTP

Due to extreme fire and explosion hazards associated with Class 1 cargoes, matches and lighters are strictly prohibited aboard. Only the Master of the vessel or the Captain of the Port (COTP) possesses the authority to designate any specific smoking area.