Question 47 FCP01 - First Class Pilot

The Correct Answer is D. ### Why Option D is Correct Option D, **"One prolonged followed by three short blasts"**, is the required fog signal for a manned vessel being towed at night, applicable under both International and Inland Rules (COLREGs Rule 35(e)). Rule 35(e) states that a vessel being towed or, if the manned vessel being towed is the last in the tow, the vessel being towed shall, at intervals of not more than 2 minutes, make the signal: **one prolonged blast followed by three short blasts**. This distinctive signal serves to inform other vessels not only that a vessel is present but also that it is part of a tow, which affects its maneuverability. ### Why Other Options Are Incorrect * **A) One prolonged followed by two short blasts:** This is the fog signal required for a vessel **not under command**, a **restricted in her ability to maneuver** (when underway), a **sailing vessel**, a **fishing vessel** (when underway or at anchor), or a **towing vessel** (if it is unable to comply with Rule 35(c) which requires only a prolonged blast). This is the signal for vessels that are inherently less maneuverable or cannot comply with the standard signal. * **B) Two prolonged blasts:** This is the required fog signal for a **vessel underway but stopped and making no way through the water**. This signal indicates that the vessel is not moving but is not anchored or tied up. * **C) One prolonged followed by one short blast:** This signal is not a standard required fog signal under Rule 35. (Note: A single prolonged blast is the signal for a power-driven vessel making way through the water, and one prolonged followed by two short blasts is the signal for certain limited maneuverability vessels, but one prolonged and one short is not assigned to a specific vessel type.)