82046-PG-B1
ST3400H PILOT’S GUIDE
Page 6-3
6.2 Alert
Display
When an alert occurs, REL is automatically selected, in ARC view, at an
appropriate range to put the conflict on the screen. After the alert occurs
the pilot may select other display modes (such as TOPO) and/or other
ranges if desired.
The terrain display shows all terrain – not only that which represents actual
conflicts. For instance if two cells are threats simultaneously, both cells
will be visible on the ST3400H but only the closest one will be circled.
There may be other areas of conflict!
In Figure 6-1 note the alert is on a green cell and in Figure 6-4, the alert is
on a yellow cell. Both represent terrain below the aircraft. This is
occurring because the aircraft is descending, but the cell is still below the
aircraft’s
current
altitude. In REL display any color cell may produce an
alert, depending on the descent rate. In level flight only yellow or red
cells will produce an alert.
Figure 6-4 “WARNING TERRAIN” Annunciation
6.3
External Annunciation
If optional external annunciators are installed, they will display
simultaneously with the on-screen annunciations in Amber or Red.
6.4
Responding to an Alert
Every alert should be considered valid and requires appropriate action.
