ATN PVS-14 Operator's Manual page 56

MaGnet
FIGURE 2.16. LOCATING THE MAGNET
FIGURE 2.17. COMPASS INSTALLATION
(4) press the compass onto the objective lens at an angle using
your left hand. Slowly turn the compass counterclockwise until it is
in the vertical position (with compass illumination button pointing
down). See Figure 2.17.
(5) ensure that the compass fits tightly to the objective lens.
(6) refer to paragraph 2.4.6. for operation of the compass.
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