Which of the following is a method used for celestial navigation?

• A. Star Positioning
• B. Visual/Aerial Observation
• C. Compass Reading
• D. Gyrocompass Adjustment

Answer: (A)

Celestial navigation relies on the positions of celestial bodies, such as stars, planets, the moon, and the sun, to determine a vessel's position on the Earth's surface. The method of star positioning involves measuring the angle between the horizon and a celestial body at a specific time, using tools like sextants, and applying calculations to establish latitude and longitude. This technique is crucial for navigation, especially in open waters where terrestrial landmarks are not visible.

The other methods listed do not pertain to celestial navigation. Visual or aerial observation generally involves looking at physical landmarks or understanding terrain and is a different form of navigation. Compass reading is used for terrestrial navigation that relies on magnetic bearings, while gyrocompass adjustment relates to the use of gyrocompasses for modern navigation, primarily using mechanical means rather than celestial bodies. Hence, star positioning is clearly the method specifically employed for celestial navigation.