Garmin GNC 420AW, Installation Manual

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400W Series Installation Manual Page 1-17
190-00356-02 Rev. G
1.7 Database Options and Updates
1.7.1 Aviation Database
The aviation database resides on a database card that is inserted in the left card slot on the unit front
panel.
The database is generated on periodic cycles from current Jeppesen data and converted to the format used
by the 400W Series unit products. The data conversion process is performed using software that is
developed and maintained under Garmin document control processes according to RTCA/DO-200A,
Standards for Processing Aeronautical Data.
The database can be updated by purchasing a database subscription from Jeppesen. The database updates
include either replacing or re-programming the database card and inserting the updated card in the left
card slot on the unit front panel. Contact Jeppesen at 800-621-5377 or www.jeppesen.com for more
information and instructions.
Contact Garmin for more information on databases available for the 400W Series unit.
1.7.2 Terrain Database
The Terrain database resides on a database card that is inserted in the right card slot on the unit front
panel.
The Terrain database, which serves the standard configured 400W Series unit providing Terrain
functionality, is available for updating on periodic cycles and is available from Garmin. Terrain database
updates can be accomplished by replacing or reprogramming the database card and inserting the updated
card in the right card slot on the unit front panel. The Terrain database can be downloaded via the internet
and the card programmed using a USB programmer available from Garmin. Contact Garmin at 800-800-
1020 or www.garmin.com for more information or instructions.
1.8 Fault Detection and Exclusion (FDE)
The 400W Series unit, when installed as defined in this manual, complies with the requirements for GPS
primary means navigation in oceanic and remote airspace when used in conjunction with the FDE
Prediction program included with the GNS 400W/500W Series Trainer CD.
The 400W Series unit includes fault detection and exclusion (FDE), which is active for all flight phases
including oceanic and remote operations, en route and terminal, and precision and non-precision
approaches, and does not require any pilot interaction. The FDE consists of two parts:
1. The fault detection function detects a satellite failure that can affect navigation; and
2. The exclusion function is the capability to exclude one or more failed satellites and prevent them
from affecting navigation.
The FDE Prediction program, included with the GNS 400W/500W Series Trainer CD, is used to predict
FDE availability. The FDE Prediction program must be used prior to oceanic or remote area flights for all
operators using the 400W Series unit as primary means navigation under FAR parts 91, 121, 125, and
135.