Database Options And Updates; Navigation Database; Taws/Terrain Database; Fault Detection And Exclusion (Fde) - Garmin GTN 725 Installation Manual

1.6

Database Options and Updates

1.6.1

Navigation Database

The navigation database resides on a database card that is inserted in the 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 GTN 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 GTN.
1.6.2

TAWS/Terrain Database

The TAWS/Terrain database resides on a database card that is inserted in the card slot on the unit front
panel.
The TAWS/Terrain database which serves both functions of Terrain Awareness and Warning System
(TAWS) and the standard configured GTN providing terrain functionality is available for updating on
periodic cycles and is available from Garmin. TAWS/Terrain database updates can be accomplished by
replacing or reprogramming the database card and inserting the updated card in the card slot on the unit
front panel. The TAWS/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.
1.7

Fault Detection and Exclusion (FDE)

The GTN 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.
The GTN 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 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 GTN unit as primary means
navigation under FAR parts 91, 121, 125, and 135.
Page 1-12
Rev. A
GTN 725/750 TSO Installation Manual
190-01007-02