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KMD 250 Pilot's Guide
Section 1
Basic Operation
Map Operation
Rev 2 Apr/2004
NOTE: If there is no altitude input to the KMD 250, all altitudes will be
regarded as being within the boundary of the SUA area.
The message prompt for a special use airspace alert will occur when the
aircraft’s position is at a point such that a projection of the aircraft’s
existing track over the ground is approximately 10 minutes from pene-
trating the outer boundary of one of these areas. It will also occur if the
aircraft is within approxi-
mately two nautical miles of
one of these areas even if
the aircraft’s projected track
over the ground won’t actu-
ally penetrate the SUA area
(see Figure 1-42). If one of
the SUA areas is penetrated,
another message will state:
Inside SUA.
The SUA alert feature may
be disabled (or enabled) on
the Navigation Setup Page.
See Navigation Setup later
in this section.
If the SUA alert feature has been enabled, the KMD 250 allows selection
of a vertical buffer on the in order to provide an additional layer of protec-
tion from inadvertently entering an SUA. The vertical buffer serves to
“stretch” the SUA area in both directions (up and down) by the selected
buffer altitude. For example, a buffer of 1,000 feet is selected and the
actual SUA area exists from 5,000 feet MSL to 12,000 feet MSL. In this
case SUA alert messages are displayed if the aircraft enters the lateral
boundary at any altitude between 4,000 and 13,000 feet MSL.
CAUTION
It is the pilot’s responsibility to avoid special use airspace where
ATC clearance to penetrate is required but has not been obtained.
The airspace alert is only a tool to assist the pilot and should never
be relied upon as the sole means of avoiding these areas.
Figure 1-42
10 MIN
2 MILES