The LandMark™ system compares its internal terrain, obstacle and runway database with your aircraft’s position, altitude, speed, track, heading, and phase-of-flight information to generate necessary alerts. The database consists of four distinct types of information listed below, which are updated at different times.
- Terrain provided by Jeppesen®
- NavData™ Runways provided by Jeppesen®
- Obstacles data provided by the FAA
- Magnetic variation tables provided by NOAA
Terrain Database – updated at irregular intervals whenever new data is available from government sources. Jeppesen® is actively monitoring and evaluating sources of terrain data and will provide updates as new information is available.
Obstacle Database – updated approximately every 56-days on every other AIRAC* cycle when released by the FAA.
Magnetic Variation (MagVar) Tables – provided by NOAA and does not require frequent updates since the data is good for many years.
*AIRAC (Aeronautical Information Regulation and Control)
Checking database version:
To determine if your LandMark™ datacard contains the most recent information available for any of the four database types, use the Database Version Compare tool below to obtain your database version from your LandMark™ 67DC datacard. Your database version number can be found on the back of your datacard as an XX.XX number and is also reported aurally during the pilot-initiated self test.
North American Database Version (search format ##.## [e.g. 12.01] )