Garmin GPS 92 - Manual (Page 66)

Altitude Buffer
The ‘ALT BUF’ field, located directly below the SUA
alarm settings, is an altitude buffer that allows you to set
a specific altitude range for triggering SUA alerts. This
helps add an extra margin of safety to your estimated alti-
tude error to ensure you receive SUA messages in time to
avoid unwanted SUA intrusions. The default altitude
buffer setting is 200 feet.
The value of the altitude buffer is added to an esti-
mated altitude error calculated by the GPS 92. This value
is then added or subtracted from your present GPS alti-
tude. If the final adjusted altitude falls within an SUA,
you’ll receive a message. If the adjusted altitude does not
place you in an SUA, you won’t receive the message.
To enter an altitude buffer:
1. Highlight the ‘ALT BUF’ field and press
E
.
2. Enter a buffer value and press
E
.
NOTE: If you fly above or below an airspace, then
descend or climb to enter the airspace, the ‘Inside
Airspace’ message may be the only alert provided! The
‘Airspace Ahead’ and/or ‘Airspace Near’ messages will not
occur if you are outside the vertical limits defined by the
airspace, plus the altitude buffer.
CDI Alarm
The next section of the alarms page allows you to set
a CDI/crosstrack alarm, which defines a maximum
allowable left/right off course error. The CDI alarm will
provide a message when your crosstrack error exceeds
the specified distance.
To set the CDI alarm:
1. Highlight the ‘CDI ALARM’ field and press
E
.
2. Select ‘ON’ and press
E
.
3. Press
E
to select the distance field, enter a distance
(up to 99.9 nm) and press
E
.
Setting an altitude buffer.
The CDI alarm will alert
you if you are off course by
more than the selected limit.
Main Menu:
Alarms
Reference
60
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92 manual 4/15/98 3:48 PM Page 60