B&G H2000 Pilot *DISCONTINUED* - Manual (Page 80)

HB-0844-04
3-15
3.4.3 Super Halcyon 3 Compass Calibration Procedure
(1) Check for any magnetic devices placed near the compass,
especially ones that are out of their normal places.
(2) On a calm day select a stretch of open water with little traffic,
(so you will not have to take avoiding action that would ruin the
calibration). The flatter the water and the less the wind the easier it
will be to meet the conditions for the calibration.
(3) Check for any large steel structures nearby that may cause
additional erratic deviations.
(4) At a speed of about three knots slowly motor the boat through a
full one and a half turns (540°), taking six to fifteen minutes to
complete the one and a half turns. At this rate the heading should be
changing at no faster than one degree every second. Having a
watch beside the compass display should considerably assist the
helmsman in monitoring the rate of turn. The rate of turn is indicated
on the Halcyon Display.
(5) When the compass has completed its calibration, the displayed
heading will rotate in the opposite direction for 360° and settle on
the correct bearing to indicate the calibration is complete. You
should continue to turn until you see this.
Note
If the displayed heading does not reverse, the calibration was discarded
because the conditions were not met. You must start again, or try another
day when wind and wave conditions are calmer.
(6) Eliminate any constant error in heading. These are normally
checked for by using shore-based transits, once the error is known it
can be eliminated by entering the value into the Hercules under:
NAVIGATE
→ → HEADING, CALBRATE → → CAL VAL1
For example, the compass was reading 320 degrees and it should read 316,
then the value to enter would be -4.