Compass Mode - Backward Bearing And Compass Lock; Compass Mode - Calibrating The Compass; Compass Mode - Setting Magnetic Declination; Compass Mode - Magnetic Declination At Major Cities - Lad Weather Sensor Master III Instruction Manual

8.3 Compass Mode -
Backward Bearing and Compass Lock
navigating navigating
direction direction
315˚
0˚
[S/S]
backward
135
bearing
Normal Bearing Backward Bearing
indicator
NOTE:
- When the 'Backward Bearing indicator '
bearing direction of the navigating direction.
- When the 'Lock' indicator ' ' is appeared, the compass direction, bearing direction and the
magnetic north pole pointer are locked and would not be changed.
- The Compass Lock will be released automatically when the Watch enter IDLE Mode.

8.4 Compass Mode - Calibrating the Compass

Compass Mode
Hold [M] Hold [M]
[M]
Rotation Calibration Magnetic Declination
Stop Display Display
[S/S] /
[S/S]
[L/R]
start
turning axis
Rotation Calibration
Start Display
Compass Calibration
compass
0˚
lock indicator
0˚
[L/R]
Direction Unlock Direction Locked
' is appeared, the Watch is showing the backward
Calibration Display
- In Compass Mode, press and hold [M] to enter
Compass Calibration display
- To start rotation calibration, press [S/S] button once.
The pointers will start rotating, turn the watch ( keep
parallel to the horizon) in the same direction of the
rotation pointers for more than 2 turns.
- Press [S/S] or [L/R] button to stop the calibration when
the 2-turn rotation calibration is completed.
- When the pointer stop rotation, hold [M] button to back
to the Compass Mode or press [M] button once to set
the magnetic declination.
turn
turn
turn
Completed
'Rotation' Process

8.5 Compass Mode - Setting Magnetic Declination

Magnetic True North
North
Magnetic Magnetic
Declination Declination

8.6 Compass Mode - Magnetic Declination at Major Cities

What is Magnetic Declination
- The Magnetic North Pole which is slightly different from
the True North Pole. This Watch, like most magnetic
compass, points to the Magnetic North Pole, while
everything measure from a map is related to the True
North Pole.
- The angular difference between Magnetic North Pole
and True North Pole is called magnetic declination. Its
amount (degrees and minutes) and direction (easterly
and westerly) depend on where you are in the world.
- For serious compass user or whom intends to perform
accurate navigation, this Watch must be adjusted for
magnetic declination.
Magnetic Declination Information
- Most topographic maps include a small arrow which
shown magnetic north pole and or the magnetic
declination information.
- This manual includes the magnetic declination for some
major cities. See the coming chapter 'Magnetic
Declination at Major Cities' for more detail.
- For the cities are not included in the list, please refer to
the online magnetic declination calculator at:
- http://geomag.nrcan.gc.ca/apps/mdcal_e.php
- http://www.ngdc.noaa.gov/seg/geomag/jsp/Declina-
tion.jsp