How to Take Compass Azimuth Measurements with the MD69AZI Bearing Repeater Compass Sight

Taking Terrestrial Bearings

To take bearings of landmarks or low luminosity objects near to or on the horizon, set the arrow on the prism adjustment thumbwheels to ↓ DOWN. A distant target is sighted directly by the eye and the compass card simultaneously viewed indirectly through the prism. Max. altitude approx. 34° above horizon. If sun filters are required simply move them to the required angle.

Without Sun Filters

With Sun Filters

Taking Celestial Bearings

To take bearings of the sun or other celestial objects high in the sky, set the arrow on prism adjustment thumbwheels to ↑ UP. The compass card is viewed directly through the collimating lens and a distant object simultaneously viewed indirectly through the prism. Max. altitude approx. 60° above horizon. If sun filters are required simply move them to the required angle.

Without Sun Filters

With Sun Filters