BOTH INTERNATIONAL & INLAND Which fog signal is a power-driven vessel making way through the water required to sound?

Correct Answer: Option A — One prolonged blast at intervals of not more than two minutes

Rule 35(a) mandates that a power-driven vessel making way through the water shall sound at intervals of not more than two minutes one prolonged blast. This signal identifies the vessel's status and presence to others in restricted visibility, ensuring compliance with international and inland navigation safety standards.