What's the difference between a nautical astrolabe and a compass?

There are some differences between navigation altimeter and compass in function, concept and use.

1. Function: Navigational astrolabe is a tool used in navigation, geodesy, travel and military affairs, while compass is a feng shui detection tool and a special instrument for geography.

2. Concept: Nautical astrolabe is a navigation instrument based on astronomical observation, which is used to determine the direction and observe celestial bodies. Compass, also known as compass, is an instrument based on the principle of magnetism, which is used to measure and determine the orientation.

3. Use: The navigation astrolabe is mainly used for navigation, including determining the direction and navigation route of ships. Compasses are widely used in Feng Shui detection, geographical research, architecture and other fields.

Generally speaking, nautical astrolabe and compass have their own unique functions, concepts and uses, which need to be selected and used according to specific needs.