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Angular Heading Selection
The GPS 12gives you the ability to change your
angular display. Choose this field to toggle between
degrees and MILS.
To change between degrees and MILS:
1. Highlight the angle heading field and press
E
2. Select the desired setting and press
E
.
Alarms
The alarms page is used to set two alarms on the
GPS 12: arrival and CDI. The arrival alarm will alert
you when you are approaching a waypoint. The arrival
alarm has three available settings:
•’Off’— No alarm will occur.
•’On’— The alarm will occur at the user-specified dis-
tance from the destination waypoint.
•’Auto’— The alarm will occur at one minute away
(based upon current speed, distance & track)
from the each waypoint in the active route or
from the GOTO destination.
To set the arrival alarm:
1. Highlight the ‘ARRIVAL’ field and press
E
.
2. Select ‘On’, ‘Auto’ or ‘Off’, and press
E
.
3. If ‘On’ is selected, highlight the distance field, press
E
, enter the desired distance and press
E
.
The CDI alarm will alert you if your position devi-
ates off course (left or right) beyond the limits specified.
To set the CDI alarm:
1. Highlight the ‘CDI Alarm’ field and press
E
.
2. Select ‘On’ or ‘Off’, and press
E
.
3. If ‘On’ is selected, highlight the distance field, press
E
, enter the desired distance and press
E
.
Note: The arrival and CDI alarms both have setting
ranges from 0.0 to 9.9 units (statute miles/nautical
miles/kilometers). Setting the CDI alarm to its lowest
limits may cause false alarms due to the effects of
DOD-imposed Selective Availability. Selective
Availability can degrade your GPS position by as much
as 100 meters.
Angular
Heading &
Alarms
REFERENCE
46
The arrival alarm alerts
you when you’ve reached
your destination. ‘Auto’
provides an alert at one
minute from your destina-
tion. ‘On’ allows you to
define an alarm distance.
The CDI alarm warns you
when you deviate off
course (left or right)
beyond the limits that you
set.
The angular heading
selection field gives you a
choice between degre e s
and MILS.
GPS12B 1/17/99 4:36 PM Page 46