Magnetic North And True North; Digital Compass Reading Precautions; Altitude Measurement; Checking The Current Altitude - Casio 5594 Operation Manual

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 in motor vehicles, 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.)
Operation Guide 5594

Altitude Measurement

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
(Offset)
The altitude correction value and
●
barometric pressure changes may
result in display of a negative value.
Check the information 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
Checking the Current
Altitude
1.
Enter the Altimeter Mode.
Navigating Between Modes
l
Entering the Altitude Mode will start
altitude measurement and display the
altitude at your current location.
You can navigate between display
●
screens by pressing (D).
Altitude graph
Altitude
D
Altitude graph
The watch takes altitude readings every
●
second for about the first three minutes.
After that, it takes readings according to
the watch's auto measurement interval
setting.
Check the information below to find out
●
how to configure the auto measurement
interval.
Setting the Auto Measurement Interval
l
To retrigger measurement, press (A).
●
Press (E) to return to the Timekeeping
●
Mode.
Note
When you enter the Altitude Mode, the
●
second hand will indicate either
timekeeping seconds, or the
differential between altitude
measurements (whichever was
indicated the last time you were in the
Altitude Mode).
You can change what information is
indicated by the second hand.
Checking the Altitude Differential
l
from a Reference Point
Measurement range: -700 to 10,000
●
meters (-2,300 to 32,800 feet)
(Measurement unit: 1 meter (5 feet))
Note that calibrating altitude readings
will cause a change in the
measurement range.
[- - -] will appear for the measured value
●
if it is outside the allowable range.
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