WeatherMaster A - Compass Mode Operations; Compass Usage Precautions; Compass Directions Explained; Bearing Directions Explained

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12.0 Compass Mode - Precautions

12.1 Compass Mode - Compass Directions and Bearing Directions

12.2 Compass Mode - Compass Mode

12.3 Compass Mode - Backward Bearing Direction and Compass Lock

Backward Bearing Direction

! The Watch includes a backward bearing function.

! The backward bearing direction is the bearing

dir e ction in th e opposite d i rection fro m the

normal bearing direction.

! When the 'Backward Bearing' indicator " "

appears, the Watch is showing the backward

bearing direction of the navigation direction.

! In the Compass Mode, press the [S/S] button to

select between normal and backward bearing

directions.

Compass Lock

! The Watch includes a compass lock function that

locks useful direction reading.

! In the Compass Mode, press the [L/R] button to

lock/unlock the direction reading.

! When the "Lock" indicator " " appears, the

compass direction, bearing direction and the

magnetic north pole pointer are locked.

! Compass Lock will be released automatically

when the Watch enters IDLE Mode.

0°

COMP

Norm a l Bea rin g Dire ctio n Backward B earin g Dire ctio n

305°

125°

0°

backward

bearing

indicator

normal

bearing

direction

backward

bearing

direction

[S/S]

Dire ctio n Unlo cked

Dire ctio n Lock ed

compass

lock indic ator

[L/R]

COMP

Precautions for using the Compass

Check the 'What is Magnetic

Declination' section for more details.

Keep your Watch away from magnets or any

appliances which may contain magnetic objects

such as mobile phones, speakers, motors and

etc.

! The Watch, like most magnetic compass, points

to the magnetic north which is slightly different

from the true north.

! Perform the compass calibration from time to

time, because the calibration can ensure the

precision of the compass.

! To achieve an accurate result, you should avoid

measuring direction on the following conditions:

1) The watch is placed close to the magnetic

objects,

2) The watch is placed close to the metal

objects,

3) The watch is placed close to the electrical

appliances

4) The watch is placed inside a moving object or

a ferroconcrete building.

The Direction of an Object

! The direction of an object from a point can be

specified in either compass directions or bearing

directions.

! The Watch includes both compass directions and

bearing directions.

The Compass Directions

! The c ompa s s dir e ctio n s are s hown in th e

adjacent table.

! For example , in the f igure on t he left, the

compass direction of object B from point A is due

East. The compass direction of object C from

point A is Southeast. The compass direction of

object D from point A is Northwest.

The Bearing Directions

! The Bearing direction of an object is defined as

the angular difference between North and the

obj e ct. ( A ss ume 0 f o r d ue No r th, an d the

measuring range is from 0 to 359 ).

! For example, in the figure on the left, the bearing

direction of object B from point A is 90 . The

bearing direction of object C from point A is 135 .

The bearing direction of object D from point A is

315 .

° °

Compass Mode

! In the Compass Mode, the top row of the display

shows the compass direction.

! The middle row of the display shows the bearing

direction.

! The bottom row of the display shows the current

time in hour and minute.

! The p o inter e nc ircle d the d i sp lay sh o ws the

direction of magnetic North analogically.

IDLE Mode

! If no key is pressed for about 1 minute, the watch

will go to the IDLE Mode automatically. To activate

the compass again, press any button.

Distortion

! If distortion is detected, the indicator "O FF C AL"

and flashing bearing direction will appear.

! Please refer to the coming section "Calibrating the

Comp a s s" to res t o re the com p as s t o n or ma l

operation when distortion is detected.

COMP

Dig it al Compass Mode

current ti me

beari ng di rection

of navigat ion

directio n

magne tic n orth pole

pointer

navig ati on direction

compass di rection

obje ct B

obje ct C

Compass Di rections

Bearing Di rections

obje ct C

obje ct D

angu la r

differen ce

poin t A

90°

135°

315°

poin t

0°

Marks

SSE

SSW

WNW

NNW

Compa ss Direct ions Beari ng Direct ions

North

North east

East

South east

East So utheast

South S outhwes t

North N orthwes t

South

South west

West

North west

ESE

ENE

WSW

NNE

West Northwest

West Southwest

South S outheas t

East No rtheast

North N ortheas t

Compass Mode

Idle Displ ayNorma l Dis play

Distorti on display

COMP