Question 11 OSV02 - Mate - Offshore Supply Vessels

The Correct Answer is B A power-driven stand-on vessel (which is generally the vessel to starboard in a crossing situation) is governed by Rule 17 of the International and Inland Rules of the Road (33 CFR Subchapter E). **Why Option B is Correct:** Option B states the vessel is "required to maintain course and speed in a crossing situation but may take action to avoid collision." * **Initial Requirement (Maintain Course and Speed):** Rule 17(a)(i) explicitly states that where one vessel is required to keep out of the way, the other vessel (the stand-on vessel) shall **"keep her course and speed."** This is necessary so the give-way vessel can accurately determine how to maneuver safely. * **Collision Avoidance (Taking Action):** Rule 17(b) dictates that the stand-on vessel **may** take action to avoid collision as soon as it becomes apparent that the vessel required to keep out of the way is not taking appropriate action. Furthermore, Rule 17(c) dictates that the stand-on vessel **shall** take action when collision cannot be avoided by the action of the give-way vessel alone (i.e., at the point of "imminent danger"). This aligns perfectly with the entire structure of the Rules—avoidance of collision is the ultimate goal (Rule 2, General Prudential Rule). **Why Other Options Are Incorrect:** * **A) required to give-way in a crossing situation:** This is the definition of the **give-way** vessel (the vessel to port, required by Rule 15). The stand-on vessel is required to maintain its course and speed, not give way. * **C) required to sound the first passing signal in a meeting situation:** In a meeting situation (Rule 14), both vessels are considered give-way vessels and are required to alter course to starboard to pass port-to-port. There is no designated "stand-on" vessel in a head-on meeting situation, and the sounding of signals is based on the action taken (e.g., a short blast indicates an intention to pass on the port side). * **D) free to maneuver in any crossing or meeting situation as it has the right of way:** While the vessel has the "right of way" (stand-on status), it is **not** "free to maneuver." It is strictly mandated by Rule 17(a)(i) to maintain course and speed initially. Failure to do so would confuse the give-way vessel and violate the Rules. Additionally, Rule 17(b) allows, but does not grant freedom for, early maneuvering; it is only permitted once danger becomes apparent.