How to use an equatorial mount for terrestrial observing

It is awkward to use an equatorial mount for terrestrial objects, as any sweep to the right and left will also have the tube move up and down. Try raising the polar axis to 90 degrees on the latitude scale. Now the polar (RA) axis acts like the azimuth and the declination axis acts like altitude

–making it easy to sweep along the horizon or elevate to look at land objects.

 

Updated 12/25/13