BOTH INTERNATIONAL & INLAND What is the identity signal which may be sounded by a vessel engaged on pilotage duty in fog?

Correct Answer: Option C — 4 short blasts

Rule 35(i) permits a vessel engaged on pilotage duty, when engaged on pilotage duty, to sound an identity signal consisting of four short blasts in addition to the signals prescribed in Rule 35(a), (b), or (g). This helps distinguish the pilot vessel from other traffic in restricted visibility.