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 (where adopted), specifies the fog signal for a vessel being towed or for an unmanned vessel being pushed ahead or towed. The required signal is: **One prolonged blast followed by three short blasts** (immediately after the vessel making way through the water or at anchor would normally sound its signal). This signal clearly indicates the vessel's status as being restricted in its ability to maneuver because it is under tow. **Why each of the other options is incorrect:** * **A) One prolonged followed by two short blasts:** This is the required fog signal for a **sailing vessel**, a **vessel restricted in her ability to maneuver** (such as dredging or surveying), a **vessel constrained by her draught**, a **fishing vessel**, or a **towing vessel** (when not making way). It does not signify a vessel being towed. * **B) Two prolonged blasts:** This is the required fog signal for a **vessel not under command** or a **vessel pushing ahead or towing** (if the tow is not making way through the water). * **C) One prolonged followed by one short blast:** This is not a standard fog signal specified in Rule 35 of the COLREGs for any vessel status. The standard signal for a vessel making way through the water is simply **one prolonged blast**.