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?
• Class 1 explosives handling requirements under U.S. regulations • Difference between when cargo is actually being handled vs. when the space/hatch is simply open • The idea of continuous attendance versus intermittent or random checks
• Ask yourself: Is the main safety concern only while the explosives are moving, or also when they are simply exposed in an open space? • Consider whether regulations for dangerous cargo usually prefer continuous supervision or allow periodic/random monitoring. • Think about what could go wrong if no responsible person is present while the hatch is open but cargo is not actively moving.
• Compare each answer choice against the idea of constant vs. occasional supervision. • Check which options clearly ensure a responsible person is present whenever the explosives are exposed or accessible. • Eliminate any option that would leave the explosives unsupervised for predictable periods during normal cargo operations.
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