Imicrometer knob is rotated to centre a graduation line of the main scale to the index pointer; the indicated angle is the sum of the two scale readings. For horizontal use an accessory base is required
An optical instrument consisting of a sighting tube and a quadrant scale plate, used to ascertain the angle of elevation of an object.
Classification: Levels (surveying)
NSN 5998-01-289-2076
NSN 5998-01-414-5228
NSN 2925-01-285-7163
NSN 5998-01-559-0013
NSN 4140-00-307-2732
NSN 6105-01-092-0788
NSN 5910-01-282-6896
NSN 5965-01-193-0420
NSN 6240-01-502-7280
NSN 5996-00-276-5480
NSN 6220-01-187-8721
NSN 6135-01-377-5729