Survey Compass

In surveying, a compass is used to determine the direction of survey lines by referencing the Earth’s magnetic north. The most common types are the Prismatic Compass (for direct bearing readings while sighting) and the Surveyor’s Compass (for measuring horizontal angles). Main uses: Measuring bearings between points. Establishing directions for survey lines. Setting reference meridians. Key parts: magnetic needle graduated circle sighting device and pivot system. It is portable, easy to use in the field, and essential for quick, preliminary surveys where high precision instruments like theodolites are not required.