Manual calibration
To manually calibrate your Precision™ 9 compass, go to your compatible display unit and find it in the devices list, usually
under
Settings
>
Network
(or
Boat network
) >
Device list
(or
Devices
) >
Precision-9
. Select
Calibrate
or
Recalibrate
compass
(depending on your display unit) and follow the on-screen instructions.
¼
Note:
If your display unit supports auto calibration, the auto calibration mode must first be set to
Off
.
Important points:
•
Manually calibrate your compass in calm sea conditions with minimal wind and current.
•
Ensure there's enough open water around the vessel to maneuver a turn of about 390 degrees.
•
Maintain a turn rate of about 2-3 degrees per second until you see a notification that the calibration is complete.
¼
Note:
If an autopilot is configured, a setup guide automatically takes you through compass calibration, without having to
go through the
Settings
menu.
¼
Note:
For optimal performance, you should recalibrate the compass if the vessel has traveled far from where it was
previously calibrated. Recalibration may be required because the strength of the earth’s magnetic field varies in different
geographic locations.
Data
To see the data your compass is generating, select
Data
or
Show details
(depending on your display unit) under
Settings
>
Network
(or
Boat network
) >
Device list
(or
Devices
) >
Precision-9
.
Offsets
After calibrating your compass, you should apply offsets for the heading, pitch and roll outputs to compensate for any
mounting alignment errors.
To apply pitch and roll offsets:
1.
Ensure the vessel is stationary at the dock, loaded in normal trim.
2.
Open the compass data screen by selecting
Data
or
Show details
(depending on your display unit) and take note of the
pitch and roll output values.
3.
Open the compass configuration screen and adjust the pitch and roll offsets.
4.
Return to the data screen to confirm the pitch and roll output values are 0.
The heading offset compensates for any difference between the vessel’s center line (
A
) and the
compass lubber line (
B
).
To apply the heading offset:
1.
Open the compass data screen by selecting
Data
or
Show details
(depending on your display
unit) and take note of the heading output value.
2.
If necessary, change the heading reference on your display unit (
Settings
>
Units
(or
Preferences
) >
Heading
)
so it's the same as the compass heading (
°
M
or
°
T
).
3.
Use a chart or chartplotter to find the bearing from the vessel position to a visible object.
4.
Steer the vessel so its center line aligns with the bearing line pointing towards the object.
5.
Open the compass configuration screen and adjust the heading offset so the bearing value and the compass heading
output are the same.
¼
Note:
The compass heading and bearing values may be damped. Allow time for the heading and bearing values to settle
before applying offset.
Dimensions
133 mm (5.23”)
119 mm (4.69”)
126 mm (4.96”)
72 mm (2.83”)
36 mm
(1.42”)
90 mm (3.54”)
119 mm (4.69”)
36 mm
(1.42”)
90 mm (3.54”)
126 mm (4.96”)
B
A
x
