When a fire drill is conducted on a mobile offshore drilling unit, the designated person in charge must ensure that __________.

Correct Answer: Option A — all personnel report to their stations

46 CFR 109.213 requires that during fire drills, all personnel must report to their assigned stations to ensure familiarity with emergency duties. While drills emphasize readiness, they do not require the discharge of portable extinguishers or the pressurization of hoses, which would cause unnecessary equipment wear and safety hazards.