BOTH INTERNATIONAL & INLAND While underway and pushing a barge ahead, your vessel enters a heavy rain storm. Which signal are you required to sound?

Correct Answer: Option B — One prolonged and two short blasts every two minutes

Rule 35(c) dictates that a vessel engaged in towing or pushing another vessel must sound one prolonged blast followed by two short blasts at intervals of not more than two minutes. Pushing a barge ahead constitutes a towing situation, requiring this specific sound signal during restricted visibility.