What time of day are star sights performed at their best?

Star sights are most effectively performed during civil twilight, which is the period just before sunrise and just after sunset when the sky is dark enough for stars to be visible, but there is still some light from the sun. This time provides optimal conditions for star navigation because the horizon is often still discernible, aiding in taking accurate readings of celestial bodies.

At this time, visible stars can be referenced for bearings without overwhelming interference from sunlight, which would make it difficult to see stars clearly. The distinction between the phases of twilight (civil, nautical, and astronomical) is crucial as it affects visibility and the ability to make navigational calculations.

While clear nights are indeed important for accurate star sightings, civil twilight specifically offers that unique blend of visibility for both stars and the horizon, making it the ideal time for this navigational practice.