U.S. regulations require having a responsible person present at the hatches of spaces containing Class 1 explosive materials. When does the requirement apply during cargo operations?

Correct Answer: Option A — any time the hatch containing the explosive is open whether the handling of cargo is in progress or not

Under USCG National Maritime Center examination standards, the accepted correct answer is: any time the hatch containing the explosive is open whether the handling of cargo is in progress or not.