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 6650-01-608-2240
NSN 5895-00-525-3295
NSN 5950-01-388-7335
NSN 6645-01-170-7368
NSN 2925-01-069-5324
NSN 4140-01-263-2180
NSN 6620-01-152-6837
NSN 5835-01-370-8912
NSN 5965-01-466-9932
NSN 7035-01-332-9582
NSN 6145-01-611-3971
NSN 6130-00-595-5943