Question 67 ONC04 - Mate of LT 500-1600 GRT

The Correct Answer is C **Explanation for Option C (Correct):** A navigational course change is a critical maneuver that requires the full and undivided attention of the OOW (Officer of the Watch) and the bridge team. During this process—which involves confirming the new course, ordering the rudder movements, monitoring the vessel's swing, checking the compass/gyro repeater readings, and confirming the vessel is steady on the new course—the current OOW must maintain command until the maneuver is fully completed and the ship is stabilized. Detaining the transfer of command ensures there is no lapse in accountability or attention during a period of high workload and navigational risk. **Explanation for Option A (Incorrect):** Changing engine speed, particularly routine changes as per night orders (e.g., slowing down for traffic or adjusting propeller RPM), is typically a procedural task executed by the OOW and monitored by the engine room. While it requires attention, it is generally less disruptive to the ship’s navigation and control than a course change and does not usually mandate detaining the transfer of command, provided the relieving officer is properly briefed on the change in progress. **Explanation for Option B (Incorrect):** The helm being in the "hand" (manual) mode simply means the helmsman is steering rather than the autopilot. This is a common and often preferred state, especially in restricted waters or heavy traffic, but it is a steady state of operation, not a maneuver in progress. It does not, by itself, justify detaining the watch relief process unless the manual steering is directly tied to an ongoing maneuver like a course change (Option C). **Explanation for Option D (Incorrect):** Since options A and B do not mandate detaining the transfer of command, "All of the above" is incorrect. Only critical, active maneuvers that involve changing the vessel's fundamental motion and position (such as a navigational course change, or preparing for/executing collision avoidance maneuvers) require detaining the transfer of command until completion.