|Emergency Search:||9 nearest airports, VORs, NDBs, intersections, or user waypoints; 2 nearest FSS with frequncies; 2 nearest ARTCC frequencies||Alarms:||Arrival, Proximity, Timers, SUAs less than 10 min, 2NM and inside SUA|
|Receiver:||PhaseTrac 12 tracks and uses up to 12 satellites to compute amd update position||Acquisition Time:||15 seconds (warm), 45 seconds (cold)|
|Update Rate:||1/second, continuous||Accuracy:||15 meters (position)|
|Interfaces:||ARINC 429, RS232, plotting (NMEA 0183 v2.0), Aviation, PC interface, altitude serializer, altitude encoder, fuel sensor, fuel/air data computer||Map Datums:||124 predefined, 1 user defined|
|Size:||6.25 x 2 x 5.8 inches||Weight:||27 ounces|
|Certification:||TSO C129a Class A1 (en route, terminal and approach)||Display:||80 x 240 double super twist nematic with six times the contract of typical DSTN displays. Automatic contrast adjustment with reverse video display mode for exceptional readability in direct sunlight or at night|
|Power Backup:||Optional battery pack automatically powers unit in case of electric power failure||Navigation Features:||Search and rescue operation (ladder search), course selection capability via mechanical and EFIS, HSI, Closest point of appraoch, approach navigation using published approach procedures stored on data crda, terminal naviagtion using SID/STAR from data card|
|Planning Features:||True airspeed, density altitude, winds aloft, RAIM availability, Sunrise/Sunset calculations, and trip, fuel and VNAV planning||Dynamics:||Velocity: 999 knots Acceleration: 6G|
|Power Source:||10-33 VDC, optional rechargeable battery, 115-230 VAC with optional AC adpater for GPS simulator operation||Data Storage:||Internal battery retains stored data up to 5 years|
|Part Number||GPS Description:|
|011-00412-00||As described above|
|010-N0159-00||Garmin Catalog P/N, not used for ordering|
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Garmin issued Service Advisory No. 1930 Rev B on August 13, 2020 which stated that repair services and service parts were discontinued for the GPS-155XL, GNC-250XL, and GNC-300XL units.
Garmin has provided Service Advisory 2051 for general recommendations, materials, and supplies to clean and disinfect Garmin products. Otherwise, not following the recommendations could void the warranty.
For handheld GPS receivers, database updates can be ordered and downloaded directly through Garmin's Internet site.
For panel mount GPS receivers, all database cards and computer downloads (if applicable) must be ordered through Jeppesen. Contact Jeppesen at www.jeppesen.com for more information.
See this PDF document for a detailed listing of currently available IFR GPS systems and a brief comparison.