Casio 3554 Operation Manual page 43

Magnetic North and True
North
There are actually two types of north:
magnetic north and true north.
Magnetic north: North indicated by the needle
of a compass
True north: Direction to the North Pole
As shown in the illustration below, magnetic
north and true north are not the same.
True north
Magnetic north
Earth
Note
The north indicated on commercially
●
available maps is normally true north.
Digital Compass Reading
Precautions
Location During Use
Taking readings near sources of strong
magnetism can cause reading error. Keep the
watch away from the following types of items.
Permanent magnets (magnetic accessories,
etc.), metal objects, high-voltage wires, aerial
wires, electrical household appliances (TVs,
computers, cellphones, etc.)
Note that correct direction readings are not
●
possible indoors, especially inside of
reinforced concrete structures.
Accurate direction readings are not
●
possible on electric trains, on boats, on
aircraft, etc.
Storage Location
Exposure of the watch to magnetism can
affect the accuracy of digital compass
readings. Keep the watch away from the types
of items below.
Permanent magnets (magnetic accessories,
etc.), metal objects, electrical household
appliances (TVs, computers, cellphones, etc.)
Watch Operation Guide 3554
The watch takes altitude readings and
displays results based on air pressure
measurements taken by a built-in pressure
sensor.
Important!
The altitude readings displayed by the
●
watch are relative values that are
calculated based on barometric
pressure measured by the watch's
pressure sensor. This means that
barometric pressure changes due to
weather can cause altitude readings
taken at the same location to be
different. Also note that the value
displayed by the watch may be
different from the actual elevation and/
or sea level elevation indicated for the
area where you are located. When
using the watch's altimeter while
mountain climbing, it is recommended
that you regularly calibrate its readings
in accordance with local altitude
(elevation) indications.
Calibrating Altitude Readings
l
The altitude correction value you
●
specify and/or barometric pressure
changes may cause a negative value
to be displayed.
Check the information at the link below
●
to find out about how to minimize
differences between readings
produced by the watch, and values
provided by local altitude (elevation)
indications.
Altitude Reading Precautions
l
Altitude
Measurement
Checking the Current
Altitude
1.
Display the current time screen.
Watch Mode
l
2.
Use (A) and (D) to select [ALTIMETER].
3.
Press (C).
This displays the altitude for your current
location.
Each press of (A) or (D) toggles
●
between the value display and graph
display.
Value Screen
① ②
Graph Screen
①
②
Current location altitude
A
Differential between reference
B
altitude and current altitude
Altitude graph
C
Current reading
③
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