👉 In the context of navigation, heliography is a method used to determine the direction of a celestial body or object by observing its light. It involves using an instrument called a heliometer, which measures the angle between two lines that appear to be perpendicular on a flat surface and are perpendicular to each other at a specific point on the horizon. The term "heliographically" refers to the process of measuring the direction of a celestial body or object by observing its light. It involves using an