Which angle measurement pertains to the sun's position during Local Apparent Noon?

During Local Apparent Noon, the angle measurement that pertains specifically to the sun's position is the Local Hour Angle. At this time, the Local Hour Angle reaches its maximum value, indicating the time the sun is at its highest point in the sky, directly south for observers in the Northern Hemisphere. This measurement reflects how far the sun has moved westward from its position at solar noon, which is essential for determining local time based on the sun's position.

Understanding the Local Hour Angle is crucial for navigation as it helps mariners establish their longitudinal position relative to the sun. This angle is specifically tied to the observer's local meridian and facilitates the calculation of time as related to the sun's apparent movement.

Other angle measurements, such as the Greenwich Hour Angle and Sidereal Hour Angle, pertain more broadly to celestial navigation and are not specific to the sun's position at Local Apparent Noon. The Solar Elevation Angle refers to how high in the sky the sun appears relative to the observer and is not a direct measure of time or position at noon. Thus, Local Hour Angle is the relevant measurement for understanding the sun’s position during Local Apparent Noon.