Mod : (4654 or 4885 or 5020) + (4839 or 4656)
ATR 42 Model 400/500
GNSS
NAVIGATION SYSTEM
GLOBAL NAVIGATION SATELLITE SYSTEM
P 1
NOV 01
100
1.15
.
60
60.1 DESCRIPTION
(See schematic p. 11/12)
Using information provided by a constellation of 24 satellites (the HT 1000 is
able to track up to 12 satellites at a time), GNSS is an automatic tridimensional
(latitude, longitude, altitude) location and navigation means. It also uses data
recorded in a data base.
The data base is stored in the NPU and is updated every 28 days on the ground
using a specific data loader. The effective date periods are displayed on the
MCDU IDENT page.
The navigation is normally performed using the GPS sensor (GPS mode). In the
case where the GPS position becomes unavailable, the HT 1000 reverts to DME-DME
mode, if the radio coverage allows it. If not, the dead reckoning mode (DR)
is used like a back-up utilizing true airspeed, heading and the last
computed wind data.
FUNCTIONS
HT 1000 is capable of performing all the functions associated with the great circle
navigation.
It mainly allows to perform:
- "Direct To" navigation
- Flight plan navigation
- Navigation to nearest airport (or nearest VOR, NDB...)
To know all the functions available, refer to the table of contents of the HT 1000
pilot's guide.
AA
AviationLearning.net
01/07//2018 REV 1 These notes are not revised after issue For Training Purposes Only
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