Tissot 145 manual Setting Compass Compass Calibration, Glossary Compass

SEA-TOUCH

CAL

SETTING > COMPASS > COMPASS CALIBRATION

2 sec.

Compass	Activate calibration mode
Calibration display	– glass deactivated
	during calibration

*

Turn the watch more than a complete revolution

on a horizontal surface (e.g. a table) in an

environment free from magnetic interference, at

a rotation speed of around 30° per second.

Total time: 20 seconds maximum

a)Calibration successful – data stored

b)Calibration failed – repeat calibration

N

S

Back to compass display

N		GLOSSARY > COMPASS
W	E
S
Compass
In compass mode, your SEA-TOUCH indicates
the	True	North Pole, factoring in magnetic	N

declination.

S

Compass explanations

The vertical lines (meridians) on the Earth converge at the True North Pole

(Ng), indicating its direction. The hand of a conventional compass indicates
the direction of the Magnetic North Pole (Nm).
The angle (α) between these two directions Ng
and Nm is known as magnetic declination. The	Ng
magnetic declination value depends on your
	Nm
location on Earth. Furthermore, the Magnetic
North Pole is constantly moving. So the mag-
netic declination value also depends on the
date. If the correct magnetic declination value
(for the location and date) is set (see the setting
procedure on page 7), the minutes hand of your

SEA-TOUCH will point to True North (Ng). If the magnetic declination is set to 0, your SEA-TOUCH will point to Magnetic north (Nm). The magnetic decli- nation values and dates are indicated on topographic charts, or can be found using special software available on the Internet.

For Switzerland: http://www-geol.unine.ch/geomagnetisme/Representation.htm

For the whole world: http://www.ngdc.noaa.gov/geomag/magfield.shtml

Azimuth

In compass mode, your SEA-TOUCH LCD indicates the azimuth (heading) that you need to turn to.

Azimuth explanations				Heading
The azimuth is the horizontal		Heading		N
angle between the direction		N
of an object (heading) and
True North and is measured in
degrees from 0° to 359° (e.g.:
East = 90°). In compass mode	S	Azimuth	S	Azimuth
12 o'clock represents the head-		315°		315°
ing given by the azimuth rela-
tive to True North.

Note 1

For a correct indication of North, it is extremely important to hold the watch as level as possible.

Note 2

The compass function, like any other compass, should not be used near a metal or magnetic mass. In case of doubt, you can recali-

brate your compass.

Characteristics of function

Accuracy: ± 8°

Resolution: 2°

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