Question 47

The Correct Answer is D. **Why Option D ("One prolonged followed by three short blasts") is correct:** Rule 35(e) of the International Regulations for Preventing Collisions at Sea (COLREGs), which applies to both international and inland waters (unless a specific inland rule supersedes it, which is not the case here), specifies the fog signal for a vessel being towed. A manned vessel being towed must sound a signal of **one prolonged blast followed by three short blasts** immediately after the towing vessel's signal. This signal is designed to indicate that the vessel is constrained by the tow and to identify its position relative to the towing vessel. **Why the other options are incorrect:** * **A) One prolonged followed by two short blasts:** This is the required fog signal for a vessel **not under command (NUC)**, a **vessel restricted in her ability to maneuver (RAM)**, a **sailing vessel**, a **fishing vessel (engaged in fishing)**, or a **vessel constrained by her draft (international waters only)**. * **B) Two prolonged blasts:** This signal is required only for a vessel **at anchor**. * **C) One prolonged followed by one short blast:** This signal is not defined as a standard fog signal for operational vessels under Rule 35.