ALTIWARE SERIES
17
english
alterra/aerial
18
english
COMPASS (ALTERRA ONLY)
COMPASS (ALTERRA ONLY)
COMPASS SCREEN
There is only one screen display available in the
COMPASS
mode.
The display shows the
TIME
OF DAY
in the top line. The
CURRENT
HEADING
IN QUARTER CARDINAL POINTS
is shown as a rotating
scale across the center line and the bottom line displays the
CURRENT
HEADING IN DEGREES
.
CALIBRATING THE COMPASS
The
COMPASS
of the Alterra must be calibrated on a regular basis. The
compass should be calibrated any time it does not seem to be working
properly. We recommend calibrating the compass prior to any activity
where optimal accuracy is desired, such as a long back country trip.
1.
Start in
COMPASS
mode.
2.
PRESS & HOLD
the
S5
key to enter the calibration sequence.
3.
CAL
will appear in the center line of the display.
4.
Rotate the watch clockwise for two complete rotations of
approximately 15-seconds per rotation.
5.
To exit the calibration sequence at this point
QUICK PRESS
the
S1
key. Or advance to setting the magnetic declination using a
QUICK
PRESS
of the
S5
key.
NOTE:
For the optimum accuracy, the compass must be held
completely level during the calibration process. We recommend
placing the unit on top of a drinking glass while performing
the calibration as this will make it easier to keep the compass
level.
The Alterra is equipped with a highly accurate digital magnetic compass with reading in one degree
increments. The compass can be adjusted to compensate for the magnetic declination corresponding to
the area where the compass is being used.
CALIBRATING THE COMPASS
(continued)
6.
If the calibration is successful the display will show
CAL
in the
center line and
END
in the lower line and automatically advance
to the compass display.
7.
If the calibration was unsuccessful, an
ERR
message will appear
in the lower line of the display, and you will need to repeat the
calibration sequence.
8.
If you have chosen to set a magnetic declination, adjust the
degrees and direction using the
S1
and
S2
keys. Set and advance
from variable to variable using the
S4
key.
9.
If you do not know the Magnetic Declination for your area, leave
this setting at
ZERO
.
10.
When you have completely entered the magnetic declination, exit
the calibration sequence using the
S5
key.
MAGNETIC DECLINATION
A magnetic compass points to the earth’s magnetic north pole. Depending on your location, this may
be different from True North. Adjusting the
MAGNETIC DECLINATION
allows you to compensate for
this variation. Magnetic Declination for an area can be found on topographical maps. Declination can
change over time and distance. Make sure the source for your declination settings is up to date. The
following websites are good sources for finding local Magnetic Declination.
http://www.gsc.nrcan.gc.ca/geomag/field/mdcalc_e.php
http://www.ngdc.noaa.gov/seg/geomag/jsp/Declination.jsp
REACTIVATING COMPASS
To save power, the compass feature of the Alterra unit only remains active for a period of 30-seconds.
To reactivate the compass display,
QUICK PRESS
the
S1
key.
Summary of Contents for Aerial
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