Question 65 GLI01 - Master-Unlimited Tonnage

The Correct Answer is D **Explanation for Correct Answer (D):** Wake damage is caused by the substantial waves (wake) generated by a moving vessel. The size, height, and force of these waves are directly proportional to the speed of the vessel (and its displacement). When passing close to moored vessels, docks, or shorelines, the energy in the wake can cause lines to snap, boats to bang into each other or structures, and property damage. Therefore, the most effective and universally recognized action to reduce the possibility of wake damage is to **slow down** (often defined as passing at "no wake" speed or the minimum speed necessary to maintain steerage) when passing moored vessels. This minimizes the energy in the wake. **Why the Other Options Are Incorrect:** * **A) Alternate engine speeds:** Changing engine speeds (e.g., accelerating and decelerating) does not inherently reduce the overall wake generated during passage. If the vessel is moving fast, alternating the speed will still produce damaging wakes intermittently or consistently. Reducing speed is the key factor, not varying it. * **B) Apply rudder in both port and starboard directions:** Applying rudder shifts the position of the stern and may alter the direction of the wake slightly, but it does not reduce the wave-generating energy inherent in the vessel's speed. Excessive or continuous rudder application could even lead to erratic course-keeping or increased propeller turbulence, which might exacerbate the wake effect. * **C) Passing close aboard to the moored vessel:** Passing "close aboard" (very near) significantly increases the risk of wake damage. Since the energy of the wake dissipates with distance, the closer the passing vessel is, the more severe the impact of the wake will be on the moored vessel. To reduce damage, you should ideally pass farther away and slower.