Sokkia SET 550 Setup And Operation page 24

Backsight
Backsight
NOTE: because the
NOTE: because the
sets the instrument horizontal angle encoder to
sets the instrument horizontal angle encoder to
match your desired coordinate system the
match your desired coordinate system the
mirror target is never
mirror target is never
you can accurately sight on an object or
you can accurately sight on an object or
landmark such as a building corner the mirror
landmark such as a building corner the mirror
target is not needed. Make sure the instrument
target is not needed. Make sure the instrument
is " locked
is " locked
telescope before entering the
telescope before entering the
by Angle Continued
by Angle Continued
backsight
backsight
" and accurately sighted with
" and accurately sighted with
by angle simply
by angle simply
" shot " by the beam. If
" shot " by the beam. If
backsight
backsight
...
...
angle.
angle.