Garmin GPS 155XL Pilot's Manual & Reference

Also see for GPS 155XL: Maintenance manual Installation manual Installation manual

NRST KEYSpecialUse AirspaceSECTION3NOTE: The GPS 155XL will flash the U next to the M keyto inform you of SUA alerts. You do not have to repeatedlycheck the Nearest Waypoint page for SUA information. It isprovided to supply more information on the SUA and itsboundaries. The GPS 155XL will not flash alerts, however, ifit has been turned off or if your altitude is such that you willnot enter the buffered airspace. Turning off SUA alerts andsetting the altitude buffer is described on page 105.54The nearest waypoints for other categories (VORs, NDBs, etc.) may be viewedby rotating O. Rotating O continuously to the left will stop page selection on thenearest airport category.The next page available under the GPS 155XL’s T key is the SUA (special-useairspace) alert page. The SUA alert page will alert you to as many as nine controlled orrestricted 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 10minutes, the message ‘SUA ahead < 10 min’ will be displayed.• If you are within two nautical miles of an SUA and your current course will takeyou inside, the message ‘SUA near & ahead’ will be displayed.• If you are within two nautical miles of an SUA and your current course will nottake 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 155XL’s SUA alerts are based on three-dimensional data (latitude,longitude and altitude) to avoid nuisance alerts. The alert boundaries for controlled air-space are also sectorized to provide complete information on any nearby airspace. Onceyou have met one of the described conditions, the message annunciator will flash, alert-ing 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 an SUA alert, detailed information concerning the specificSUA is provided by the T key.Nearest SUANearest SUA with controlling agency displayed.