What does LAN refer to in navigation terminology?

LAN, or Local Apparent Noon, is a crucial term in navigation, specifically relating to celestial navigation techniques. It refers to the moment when the sun is at its highest point in the sky as observed from a specific location. At this time, the sun's elevation angle reaches its peak, and it is directly south (in the Northern Hemisphere) or directly north (in the Southern Hemisphere), making it an essential concept for sailors and navigators when determining their position.

By using Local Apparent Noon, navigators can accurately pinpoint their latitude by measuring the sun's angle above the horizon. This technique helps sailors establish a reliable position fix, which is vital for effective navigation. Understanding the concept of Local Apparent Noon enables navigators to account for factors like the equation of time and variations in time zones, thus refining their celestial navigation skills.