BOTH INTERNATIONAL & INLAND A 200-meter vessel restricted in her ability to maneuver, at anchor, will sound a fog signal of __________.

Correct Answer: Option C — one prolonged followed by two short blasts every 2 minutes

Under Inland Rule 34(a), two short blasts indicates 'I intend to leave you on my starboard side' (starboard-to-starboard pass), requiring an identical two short blasts confirmation.