Celestial navigation techniques involve using the positions of celestial bodies, such as the Sun, Moon, and stars, to determine one's location on Earth. Navigators measure the angles between these celestial objects and the horizon using tools like a sextant. By comparing these measurements with nautical charts and tables, they can calculate their latitude and longitude. One of the most common methods is the noon sight, where navigators measure the angle of the Sun at its highest point in the sky. This technique helps determine latitude. For longitude, navigators often use the chronometer to compare local time with a reference time, such as Greenwich Mean Time.