You have just acquired a Geonaute C200 base plate
compass, and we thank you for your confidence in us.
This device enables you to orient yourself outdoors and
to calculate a position or an itinerary on a map. Its
ergonomic design offers maximum ease of use with a mini-
mum space requirement in your backpack. Its UTM scale
makes it easier to read the position given by a GPS on a topo-
graphical map featuring this scale system.
Use/Guidelines
Description of normal conditions of use
The C200 compass is designed to determine an angular direction (also called
BEARING or AZIMUTH) in relation to magnetic north. It features several
scales that enable you to measure distances on maps.
Restrictions on use/precautions for use
1.Compasses must always be used HORIZONTALLY. It is very important to
avoid friction against the dial's pivot point by holding the instrument no more
than 5 degrees from a horizontal position.
2.This compass detects the Earth's magnetic field. It is very important to keep
this instrument away from any sources of electromagnetic disturbance (high
voltage, emission of waves, e.g. telephone, cell phone, radio, or television;
and objects containing ferrous metals).
3.The compass detects MAGNETIC north, which is not in exactly the same
place as Geographic north. The difference (declination) depends on the
position of the user on the globe and is given by the following table.
Declination values for a few major cities around the world. For your city, use
an average value between 2 nearby cities.
If the declination is
west (W)
, subtract the indicated value from the value you
have just read. If the declination is
east (E)
add the variation to the value you
have just read.
The position of magnetic north also changes with time, but these variations are
negligible over a time span of a few years.
4.A compass is a precision instrument. Do not drop it.
5.The operation of the compass varies with the temperature. The oil that slows
the needle may congeal or liquefy depending on the ambient temperature. In
order to preserve its performance capabilities, protect the compass from
extreme temperatures (e.g. by keeping it under a garment).
6.The compass requires a few seconds to stabilize. Do not take the reading
into account until the needle has stabilized completely.
7.To use this compass, you need to have a map. Opt for a map with a scale
available on the compass. For optimal use, also bring along a wooden
pencil and an eraser.
City
Declination
Bombay
1°W
Boston
16°W
Chicago
3°W
Denver
10°E
London
4°W
Munich
1°E
New York
14°W
Paris
2°W
Rio de Janeiro
21°W
San Francisco
15°E
Shanghai
5°W
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EN
NOTICE_C200 TLL 9/08/06 12:17 Page 9
