Garmin GPS 155XL TSO - Manual (Page 67)

NRST KEY
Special Use
Airspace
SECTION
3
Altitude buffer set at 500 feet. This provides an
added 500 foot margin beyond the floor and ceil-
ing limits for an airspace.
57
All SUA alert messages except for prohibited areas may be turned on or off
through the GPS 155XL’s unit settings options, found under the M key (see page
105). Alerts for prohibited areas will always be displayed, regardless of unit settings
or operating mode. SUA alerts may be turned off so the pilot can avoid continuous
alerts in areas with extensive special use airspace. SUA alerts are automatically dis-
abled during approach operations.
Important: Turning off the SUA alerts only stops the display of SUA messages.
Any applicable SUA alert pages will still be available from the
T key.
The GPS 155XL also features an altitude buffer which may be set to provide a
greater level of protection from penetrating an SUA. By specifying an altitude in the
buffer, you can effectively stretch an SUA’s altitude boundaries in both directions. This
allows the pilot to add an extra margin of prevention around controlled or restricted
airspace. For instructions on setting the altitude buffer, see page 105.
SUA Settings Page
155xlb manual 1/12/99 4:05 PM Page 57