When cleared to execute a published sidestep maneuver, when is the pilot expected to commence the maneuver?

The correct answer highlights the importance of visual references when executing a published sidestep maneuver. A sidestep maneuver is a procedure that allows a pilot to move laterally to another runway while maintaining the approach path of the primary runway.

Once the runway environment is in sight, pilots have sufficient visual confirmation to safely commence the sidestep maneuver. This approach emphasizes overall safety and ensures that the pilot has a clear understanding of the surrounding conditions before initiating the maneuver. Catching sight of the runway allows the pilot to assess distances, obstacles, and alignment, which are critical for safely transitioning to the sidestep approach.

In contrast, other options lack the essential visual confirmation needed before executing the maneuver. Initiating the sidestep too early, such as just reaching the final approach fix or after making contact with ATC, may not account for the necessary visual cues that inform the pilot of the aircraft's position relative to the runway. Furthermore, waiting solely on visual reference to the runway without confirming the overall environment could introduce risk, as situational awareness must be maintained throughout the maneuver.