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 6220-01-368-6879
NSN 4140-00-056-4747
NSN 6135-01-062-9356
NSN 5950-01-523-7619
NSN 5895-01-216-3814
NSN 6645-00-596-5388
NSN 5905-01-403-2806
NSN 5960-01-173-5639
NSN 5915-01-034-7006
NSN 5999-01-090-7546
NSN 4140-01-429-9060
NSN 6135-00-403-0213