| 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? |
| A) any time the hatch containing the explosive is open whether the handling of cargo is in progress or not |
| B) a responsible person is required to be in attendance only while the handling of cargo is in progress |
| C) a responsible person is required to randomly check the loading process, not to maintain constant attendance |
| D) from the commencement of loading Class 1 Explosives until the completion of the final load and the vessel departs |
