Commonly referred to as a Clinometer (as in typical marine applications like boating). Two (2) scales, two (2) ranges.Top Scale gives accurate 1º readings - useful in balancing loads or platform leveling. Bottom Scale gives 5º readings in a ±60º.
A Clinometer is any of various surveying instruments for measuring angels of elevation, slope, or incline with respect to gravity. Also known as an inclinometer, slope indicator, or graiometer, these prevision instruments provide accurate real-time measurements of slope in Degrees.