Your jack-up is being towed along a shipping channel. You are concerned that a vessel that is overtaking you is coming too close to pass safely. You must __________.

Correct Answer: Option A — sound five or more short blasts on the whistle

COLREGS Rule 34(d) provides that when vessels in sight of one another are doubting whether sufficient action is being taken by the overtaking vessel to avoid collision, the endangered vessel may indicate such doubt by sounding at least five short and rapid blasts.