Which of the following actions is NOT appropriate when boating at night?

Navigating without a light is not appropriate when boating at night because it severely compromises safety and visibility. Proper lighting is crucial for ensuring that a vessel can be seen by others and for the operator to see potential hazards in the water. During night-time operations, boats are required to have navigation lights that indicate their position and direction to other vessels. Without these lights, the risk of collisions and accidents increases significantly.

In contrast, using a spotlight can be advantageous for identifying hazards or finding specific locations, while following buoys is essential for navigation and maintaining a safe course. Staying alert to sound signals is also critical at night since auditory cues can help determine the location and movement of nearby vessels, further enhancing safety on the water. Thus, proper lighting is a fundamental part of night boating safety, making it clear why navigating without a light is an unacceptable action.