Garmin GNC 420W Pilots Guide - Page 189

SECTION 10 TERRAIN 10.4 Database Information for TERRAIN General Database Information Garmin TERRAIN uses terrain and obstacle information supplied by government sources. The data undergoes verification by Garmin to confirm accuracy of the content, per TSO-C151b. However, the displayed information should never be understood as being allinclusive. Pilots must familiarize themselves with the appropriate sectional charts for safe flight. Database Versions The version and area of coverage of each terrain/obstacle database is shown on the Terrain Database Versions Page, located in the AUX Page Group (Figures 10-10 and 10-11, also Section 9.3). Databases are checked for integrity at power-up. If a database is found to be missing and/or deficient, the TERRAIN system fails the self-test and displays the TERRAIN system failure message (see Table 10-3). NOTE: The data contained in the terrain and obstacle databases comes from government agencies. Garmin accurately processes and cross-validates the data, but cannot guarantee the accuracy and completeness of the data. The terrain/obstacle databases are contained on a datacard which is inserted in the right-most slot of the GNC 420 units (Appendix A). Figure 10-10 Utility Page NOTE: Obstacles 200' and higher are included in the Obstacle Database. It is very important to note that not all obstacles are necessarily charted and therefore may not be contained in the Obstacle Database. Figure 10-11 Terrain Database Versions Page 190-00140-20 Rev. K GNC 420(A) Pilot's Guide and Reference 10-9