Question

what forestry tool is this? staff compass hand compass stereoscope relaskop

Explanation:

The tool in the image has a design typical of a staff - compass used in forestry for measuring angles and directions. It is mounted on a staff, which differentiates it from a hand - compass. A stereoscope is for viewing 3D images and a relaskop is for measuring tree heights and other forestry parameters, neither of which match the appearance of the tool shown.

Answer:

A. Staff Compass