What is the main use of a gunter's cabin?

The main use of a Gunter's cabin is taking measurements of distance. A Gunter's cabin is a device used for measuring distances, and it was invented by Edmund Gunter, a mathematician and astronomer in the 17th century. It consists of a rectangular wooden box with a glass window on one side and a series of brass rods or chains inside that are used for measuring distances. The Gunter's cabin is placed at the starting point of a measurement, and the person taking the measurement looks through the glass window to line up the cabin with the target. They then count the number of chains or rods required to reach the target to determine the distance. The Gunter's cabin is an early form of surveying equipment and is still used today in some cases.