Question 47 GLI03 - Master-LT 500-1600 GRT

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, specifies the fog signal for a vessel being towed or for a pusher and vessel being pushed ahead, when they are rigidly connected in a composite unit. The required signal is: **one prolonged blast followed by three short blasts** (a prolonged blast signifies the attention/presence, and the three short blasts indicate the tow). This signal is given at intervals of not more than two minutes. **Why each of the other options is incorrect:** * **A) One prolonged followed by two short blasts:** This is the required fog signal for a vessel **not under command** (Rule 35(c)), a **vessel restricted in her ability to maneuver** (Rule 35(c)), a **sailing vessel** (Rule 35(c)), a **vessel engaged in fishing** (Rule 35(c)), a **vessel engaged in towing** (Rule 35(c)), or a **vessel pushing ahead or alongside** (Rule 35(c)). While the towing vessel uses this signal, the vessel being towed uses a different signal (D). * **B) Two prolonged blasts:** This is the fog signal required for a **vessel at anchor** (Rule 35(g)) to sound immediately after sounding the prescribed bell or gong signal to indicate the possibility of collision. It is also used by a **vessel restricted in her ability to maneuver while at anchor** (Rule 35(g)). * **C) One prolonged followed by one short blast:** This signal is not a standard required signal for a vessel being towed under Rule 35. One prolonged blast alone is the basic signal used by a power-driven vessel making way through the water (Rule 35(a)).