Raytheon Pathfinder 1200 Instruction Manual page 43

(2) Head the vessel to the target.
(3) Establish the bearing of the target on the screen.
(4) Compare the bearing measured in step (2) and (3) above and calculate the direction
and magnitude of the bearing error.
(5) Loosen the screws which secures the SHM unit in the Scanner (See Figure 4-5).
(6) Rotate SHM unit clockwise or counterclockwise until the bearing of the target on
the screen is the same as the bearing of step (2).
(7) Tighten the screws, checking that the scale reading does not alter.
5.1.2 0 nm (Zero nm) ADJUSTMENT (See Fig. 5-3)
Set the
RANGE
at 0.25 nm and observe a target at a known real (nearest) distance.
Adjust RV3 so that the target real distance will be coincident with the displayed
distance on the screen.
4-9