Garmin GNC 420(A) Pilot's Manual & Reference

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Garmin GNC 420(A) Pilot's Manual & Reference Manual pdf 189 page image

GNC 420(A) Pilot’s Guide and Reference 10-9SECTION 10TERRAIN10.4 DATABASE INFORMATION FORTERRAINGeneral Database InformationGarmin TERRAIN uses terrain and obstacleinformation supplied by government sources. The dataundergoes verification by Garmin to confirm accuracy ofthe content, per TSO-C151b. However, the displayedinformation should never be understood as being all-inclusive. Pilots must familiarize themselves withthe appropriate sectional charts for safe flight.NOTe: The data contained in the terrain andobstacle databases comes from governmentagencies. Garmin accurately processes andcross-validates the data, but cannot guaranteethe accuracy and completeness of the data.The terrain/obstacle databases are contained on adatacard which is inserted in the right-most slot of theGNC 420 units (Appendix A).NOTe: Obstacles 200’ and higher are includedin the Obstacle Database. it is very importantto note that not all obstacles are necessarilycharted and therefore may not be contained inthe Obstacle Database.Database VersionsThe version and area of coverage of each terrain/obstacledatabase is shown on the Terrain Database Versions Page,located in the AUX Page Group (Figures 10-10 and10-11, also Section 9.3). Databases are checked forintegrity at power-up. If a database is found to be missingand/or deficient, the TERRAIN system fails the self-testand displays the TERRAIN system failure message (seeTable 10-3).Figure 10-10 Utility PageFigure 10-11 Terrain Database Versions Page190-00140-20 Rev. K