Question 11 ONC06 - Master LT 100 GRT

The Correct Answer is B **Explanation for Option B (Correct):** Option B is correct based on the International Regulations for Preventing Collisions at Sea (COLREGs), which are mirrored closely by the U.S. Inland Rules. A power-driven stand-on vessel (the vessel with the right of way) in a crossing situation is primarily governed by Rule 17 (Action by Stand-on Vessel). Rule 17(a)(i) explicitly states that the stand-on vessel "shall keep her course and speed." This is mandatory to ensure the give-way vessel can accurately assess the situation and take appropriate avoiding action. However, Rule 17(b) dictates that the stand-on vessel "may however take such action as will best aid to avoid collision" as soon as it becomes apparent that the give-way vessel is not taking appropriate action. Furthermore, Rule 17(a)(ii) mandates that the stand-on vessel **shall** take action if collision cannot be avoided by the action of the give-way vessel alone (i.e., when they are so close that risk of collision is imminent). Therefore, the stand-on vessel is required to maintain course and speed but retains the ultimate responsibility and right to take action to avoid collision if necessary, making B the accurate and comprehensive description. **Explanation for Incorrect Options:** **A) required to give-way in a crossing situation:** This is incorrect. By definition, a stand-on vessel is the vessel that maintains its course and speed, while the give-way vessel (the other power-driven vessel to port) is required to take early and substantial action to keep clear (Rule 15 and Rule 16). **C) required to sound the first passing signal in a meeting situation:** This is incorrect. In a meeting (head-on) situation, both power-driven vessels are considered "give-way" vessels (Rule 14). Neither vessel has the stand-on privilege. Furthermore, the passing signal (a short blast indicating alteration to starboard) is generally sounded by the vessel taking the action (usually proposing the passing arrangement), and there is no requirement for one specific vessel to sound the *first* signal. **D) free to maneuver in any crossing or meeting situation as it has the right of way:** This is incorrect. While the vessel is "stand-on" in a crossing situation, it is *not* "free to maneuver." It is strictly required to keep its course and speed (Rule 17(a)(i)). Additionally, in a meeting situation, no power-driven vessel has the right of way (Rule 14).