Avidyne IFD540 Pilot's Manual page 146

User Option Item Title
FLTA
Terrain Awareness (TA)
Terrain Caution Aural
Terrain Warning Aural
4-38 AUX Pages
Description
met;
Manual – Never displays the
GPS  VLOC nav source
option and no automatic nav
source switching will occur.
On* - Forward Looking Terrain
Alerting function enabled;
Off – Forward Looking Terrain
Alerting function disabled.
Note that in dual IFD
installations, both units will
need to be set to Off to disable
the function.
On* - Terrain Awareness
function enabled;
Off – Terrain Awareness
function disabled.
Caution, Terrain; Caution,
Terrain* - When selected, that
is the aural alert issued during
FLTA caution conditions;
Terrain Ahead; Terrain Ahead -
When selected, that is the
aural alert issued during FLTA
caution conditions.
Terrain, Pull Up; Terrain, Pull
Up* - When selected, that is
the aural alert issued during
FLTA warning conditions;
Terrain, Terrain; Pull Up, Pull
Up - When selected, that is the