एक थियोडोलाइट में, क्षैतिज अक्ष जिसके चारों ओर दूरबीन ऊर्ध्वाधर तल में घूमती है, उसे किस नाम से भी जाना जाता है?

Which instrument is used in plane table surveying for sighting objects and consists of a telescope mounted on a straightedge ruler?

In a Surveyor's compass, the ring is graduated in the quadrantal system, where the readings vary:

In a prismatic compass, the zero degree (0°) marking is located at which end?