Question 47 ONC05 - Master or Mate of LT 200 GRT

The Correct Answer is D **Explanation for Option D (Correct Answer):** The required fog signal for a vessel being towed, whether under the International Regulations for Preventing Collisions at Sea (COLREGs) or the Inland Rules, is established by Rule 35(e) (Sound Signals in Restricted Visibility). Rule 35(e) states: "A vessel being towed or, if more than one, the last vessel of the tow, if manned, shall at intervals of not more than 2 minutes exhibit the signal: **one prolonged blast followed by three short blasts**." This signal is required for any manned vessel in the tow (usually the last one) to alert other vessels to its presence, as it is separate from the vessel doing the towing (the power-driven vessel). **Explanation for Incorrect Options:** * **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, a vessel constrained by her draft (International only), a fishing vessel, or a vessel engaged in towing (the vessel doing the towing, Rule 35(c)). * **B) Two prolonged blasts:** This is the fog signal required for a vessel not under command, a vessel maneuvering to assist another vessel in distress, or, in the Inland Rules only, for a vessel at anchor (if giving a warning signal). * **C) One prolonged followed by one short blast:** This signal is not a standard required fog signal for any specific category of vessel under COLREGs Rule 35. (Note: One short blast is used for an overtaking maneuver, and a prolonged blast is the primary sound for a power-driven vessel making way in restricted visibility.)