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 5999-01-169-0032
NSN 6145-01-202-2054
NSN 6320-01-353-9753
NSN 5975-01-321-1085
NSN 5945-01-597-7568
NSN 5965-00-527-8818
NSN 5895-01-415-4739
NSN 5855-01-311-6666
NSN 6320-00-456-2092
NSN 5998-01-260-8587
NSN 2925-00-051-1467
NSN 5945-01-391-2699