|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 minutes, 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, fuel sensor, fuel/air data computer, gray code, serial data||Map Datums:||124 predefined, 1 user defined|
|Size:||6.25 x 2 x 5.8 inches||Weight:||41 ounces|
|Certification:||TSO C37d Class 4 (VHF Transmitter) TSO C38d Class C (VHF Receiver) TSO C129a, Class A1 (en route, terminal and approach)||VHF Transceivr Performance:||760-channel 118-136.975 MHz 5 watt minimum transmitter power|
|Comm Features:||Auto squelch control, standard headset output with sidetone and audio leveling, stuck mic transmission timeout, emergency channel select, "autotune" frequency selection||Navigation Features:||Search and rescue operation (ladder search), pilot-defined course selection and waypoint hold, closest point of appraoch, departure and arrival frequencies|
|Planning Features:||True airspeed, density altitude, winds aloft, RAIM availability, Sunrise/Sunset calculations, and trip, fuel and VNAV planning||Dynamics:||Velocity: 999 knots Acceleration: 3G|
|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 Source:||10-15 VDC, optional rechargeable battery, 115-230 VAC with optional AC adpater for GPS simulator operation|
|Moving Map Features:||14 map scales from 0.5 to 300 nm, with nearby waypoints, navaids and sectorized airspace, runway, and navigation data displayed. Autozoom feature automatically keeps present position and destination on the map, with user-selectable track up, north up or DTK up display, map decluttering by item and scale||Data Storage:||Internal battery retains stored data up to 5 years|
|Part Number||GPS/COM Description:|
|011-00433-00||As described above|
|010-N0161-00||Garmin Catalog P/N, not used for ordering|
Click on a question below to see the answer. If you have a question about this model that is not answered below, please contact firstname.lastname@example.org
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.
To update your GNC-300XL with current databases, log in to www.flyGarmin.com. Find the tabs along the top of the screen and follow the steps below:
1. Click the "Aircraft" tab
2. Click "Add an Aircraft" from the right hand side of the page.
3. Fill out all required information: Make, Model, Series, Tail number, Year, Serial Number
4. Click "Add Aircraft"
5. Click on "Add a new aircraft device" under What can I do?
6. Select the make and model of Garmin equipment
7. Enter the System ID or Serial number
8. Click on any of the database names to the left of the picture of your equipment
9. Click the "Buy Databases" button
10. Click "Buy" again
11. Click the "Download Now" button once the database has been purchased
12. On the flyGarmin website, click the "INSTALL" button. The website will automatically start to update your unit.
Navigation database updates are made available every 28 days. Updates are posted on the www.flygarmin.com website seven days before their effective date. Updates for Obstacle, Safe Taxi, and Airport Directory are available every 56 days; updates are posted on this website seven days before their effective date. Terrain databases are updated on an "as needed" basis, and not on a regular schedule. The FliteCharts database is available for update every 28-days; updates are posted on this website two days before their effective date.
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.