Zero-Base Protractor for Azimuth and Vertical Angle Measurement #2009701 (License: Personal Use)

The protractor displays two measurement systems: an outer azimuth scale (0-180° horizontal) and an inner vertical angle scale (-10° to +90°), both calibrated in degrees. It includes a central crosshair, zenith indicator, and metric ruler markings along the curved edge for distance estimation. Manufactured in the U.S.A., it’s designed for outdoor fieldwork where precise angular orientation is critical.

Used by surveyors, geologists, and outdoor educators for measuring bearings and elevation angles in terrain analysis, map orientation, and instrument calibration; matches user intent for technical field tools and educational resources.