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The next page available under the GPS 155’s NRST key is the SUA alert page.
The SUA alert page will alert you with up to nine controlled or restricted airspaces
near or in your flight path, according to the following conditions:
• If your projected course will take you inside an SUA within the next 10
minutes, the message ‘SUA ahead < 10 min’ will be displayed.
• If you are within two nautical miles of an SUA and your current course will
take you inside, the message ‘SUA near & ahead’ will be displayed.
• If you are within two nautical miles of an SUA and your current course will not
take you inside, the message ‘Near SUA < 2nm’ will be displayed.
• If you have entered an SUA, the message ‘Inside SUA’ will be displayed.
Note that the GPS 155’s SUA alerts are based on three-dimensional data (latitude,
longitude and altitude) to avoid nuisance alerts. The alert boundaries for controlled
airspace are also sectorized to provide complete information on those airspaces. Once
you have met one of the described conditions, the message annunciator will flash,
alerting you of an SUA message.
To view an SUA message:
1. Press the
M
key.
2. Press
M
again to return to the previous page.
Once you are notified of a SUA alert, detailed information concerning the specific
SUA is provided by the NRST key.
To view the SUA alert page:
1. Press the
T
key.
2. Rotate
O
one stop to the right to view the SUA alert page.
44
WAYPOINTS & DATABASE
SUA Alarms
SUA Alert Page.
SUA Near & Ahead Message.
155man (GOOD) 7/24/98 1:56 PM Page 44