What does the Altitude Intercept method calculate?

The Altitude Intercept method is a navigational technique used primarily in celestial navigation to find a ship's position. This method involves measuring the angle (altitude) of a celestial body, such as a star or the sun, above the horizon. By comparing this measured altitude with the expected altitude (calculated based on a specific position), navigators can determine their range (distance) and bearing (direction) from an assumed position to the current position.

Using this technique, navigators can achieve an accurate fix on their location, which is vital for safe and efficient navigation. It combines the principles of his assumed position with observations of celestial bodies to derive crucial information for effective route planning and to avoid hazards at sea.