9.0 Compass Mode -
Precautions
9.1 Compass Mode - Compass Directions and Bearing Directions
9.2 Compass Mode -
Compass Mode
The Precautions when Using the Compass
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Check the 'What
is Magnetic Declination' section for more
details on the difference between
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Keep your XG-30 away from magnets or the
a p p l i a n ce s w h i ch ma y co n ta i n ma g n e ti c
objects such as mobile phones, speakers,
motors and etc.
The XG-30, like most magnetic compass,
points to the magnetic north which is slightly
different from the true north.
magnetic
north and true north.
Perform the compass calibration from time to
t i m e b e c a u s e c a l i b r a t i o n r e i n f o r c e s t h e
precision of the compass.
To achieve an accurate result, you should
NOT measure direction on the following
conditions:
When the XG-30 is placed close to a
magnetic objects,
When the XG-30 is placed close to a metal
objects,
When the XG-30 is placed close to an
electrical appliances, and
When the XG-30 is placed inside a moving
object or a ferroconcrete building.
How to Specify the Direction of an Object
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The direction of an object from a point can be
specified in either compass directions or
bearing directions.
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The XG-30 includes both compass direction
and bearing direction functions.
The Compass Direction
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The compass directions are shown on the
adjacent table.
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Let's use the adjacent diagram as an example
to illustrate compass direction:
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Object B from point A is East.
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Object C from point A is Southeast.
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Object D from point A is Northwest.
The Bearing Direction
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The Bearing direction of an object is defined
as the angular difference between North and
the object. (Assume 0 for North, and the
measuring range is from 0 to 359 ).
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Let's use the adjacent diagram as an example
to illustrate bearing direction
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Object B from point A is 90 .
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Object C from point A is 135 .
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Object D from point A is 315 .
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8
8
8
8
8
Compass Mode
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The XG-30 includes three different displays.
They are the Compass Display, Idle Display and
Distortion Display.
Compass Display
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When the Compass Display is selected, the
XG-30 will show the following items on the
display:
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The compass direction of the navigating
direction will appear on the top row.
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T h e b e a r i n g d i r e c t i o n o f t h e n a v i g a t i n g
direction will appear on the middle row.
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The current time will appear on the bottom
row.
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The pointer (3-bar) encircled the display
shows the direction of magnetic north pole
analogically.
Idle Display
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If NO keystroke has been activated for about 1
minute, the XG-30 will switch to Idle Display
automatically for saving the battery.
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To activate the compass again, press any
button.
Distortion Display
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If distortion is detected, the indicator "
OFF CAL
"
with flashing direction digits will appear on the
display.
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Please refer to the coming chapter 11.8 to 11.9
to restore the compass to normal operation
when distortion occurs.
COMP
Compass Display
current time
bearing direction
of the navigation
direction
magnetic
north pole
pointer
navigation direction
compass direction
of the navigation
direction
object B
object B
object C
Compass Directions
Bearing Directions
object C
object D
object D
angular
difference
point A
N
E
90
8
SE
135
8
NW
315
8
point
A
0
8
N
0
8
N
Marks
N
NE
E
SE
SSE
SSW
WNW
NNW
Compass Directions
Bearing Directions
North
349
8
- 11
8
Northeast
East
Southeast
East Southeast
South Southwest
North Northwest
S
SW
W
NW
South
Southwest
West
Northwest
ESE
ENE
WSW
NNE
West Northwest
West Southwest
South Southeast
East Northeast
North Northeast
12
8
- 33
8
34
8
- 56
8
57
8
- 78
8
102
8
- 123
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79
8
- 101
8
124
8
- 146
8
147
8
- 168
8
169
8
- 191
8
214
8
- 236
8
192
8
- 213
8
237
8
- 258
8
259
8
- 281
8
304
8
- 326
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282
8
- 303
8
327
8
- 348
8
Compass Mode
Idle Display
COMP
Distortion display
COMP
9.3 Compass Mode -
Backward Bearing Direction and Compass Lock
Backward Bearing Direction
The XG-30 includes a backward bearing
function.
The backward bearing direction is the bearing
direction that on the opposite direction from
normal bearing direction.
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In Compass Display, press the [S/S] button to
select between normal and backward bearing
direction.
When the 'Backward Bearing' indicator " "
is appeared, the XG-30 is showing the
backward bearing direction of the navigation
direction.
Compass Lock
The XG-30 includes a compass lock function
which locks the important direction readings.
In Compass Display, press the [L/R] button to
lock/unlock the direction readings.
When the "Lock" indicator, " " is
appeared, the compass direction, bearings
direction and the magnetic north pole pointer
are locked.
T h e C o m p a s s L o c k w i l l b e r e l e a s e d
automatically when the XG-30 is switched to
Idle Display.
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0
8
Norm al Bearin g Dire ctio n
Backward Bearin g Dire ctio n
305
8
125
8
0
8
0
8
backward
bearing
indicator
normal
bearing
direction
backward
bearing
direction
[S/S]
Dire ctio n Unlo cked
Dire ctio n Locked
compass
lock indicator
[L/R]
COMP
Keep the XG-30
away from any
magnetic object
Reading relative to
Magnetic North
instead of True North
DO
measure
a compass direction
o an
electronic appliance
NOT
close t
DO
measure
a compass direction
o a
magnetic object
NOT
close t
DO
measure
a compass direction
o metal
NOT
close t
DO
measure
a compass direction
inside a
ferroconcrete building
NOT
DO
measure
a compass direction
inside a
moving object
NOT
Calibrate the XG-30
from time to time
Precautions when Using the compass
