BOTH INTERNATIONAL & INLAND A fog signal of one short, one prolonged, and one short blast may be sounded by a vessel in which situation?

Correct Answer: Option A — At anchor

Rule 35(g) permits a vessel at anchor to sound a signal of one short, one prolonged, and one short blast to warn an approaching vessel of her position and the possibility of collision. This is a supplemental signal intended to enhance safety when the risk of collision is perceived.