82046-PG-B1
ST3400H PILOT’S GUIDE
Page 5-6
5.7 REL/TOPO
Pressing the TER button will change the display from REL to TOPO. The
current mode is annunciated at the top of the display.
REL TOPO
Figure 5-6 REL and TOPO Displays
NOTE:
Selecting REL/TOPO has no affect on alerting.
5.7.1 TOPO
DETAILS
TOPO shows all the terrain in sectional chart colors in shaded relief.
Any terrain that is above the current altitude overlays in RED. Terrain
more than 1000’ above the aircraft altitude is overlaid in shaded red.
Ocean is shown in blue. Other water is shown only by its elevation color
coding.
5.7.2 REL
DETAILS
On the Relative Altitude display, only proximate terrain is shown.
Terrain with adequate terrain clearance is black (i.e. not shown). Terrain
progressively closer to the aircraft altitude is shown in green, then
yellow, and finally red.
On an approach to the airport, the yellow/green bands will shrink as the
aircraft gets closer to the runway. Within 1nm of the airport and when
on the ground, green and yellow are suppressed. Red is then used to
depict terrain above the aircraft.
NOTE
: If an alert occurs while in TOPO, the display mode will change
to REL, in ARC view, at an appropriate range to put the terrain conflict
on the screen.
