Piper ARCHER III Pilot Operating Handbook page 208

SECTION
7
DESCRIPTION & OPERATION PA-28-181,
ARCHER
III
Multi-Function
Display (continued)
Terrain Proximity
(continued)
GPS
altitude, which is
derived
from
satellite
position and therefore may
differ
from
baro-corrected altitude read
from
the altimeter,
is
converted
to
mean
sea
level
(MSl)-based altitude (GPS-MSL altitude)
and
is
used
in conjunction
with
GPS
position to
calculate and
predict
the
aircraft's
flight
path in relation
to
the
surrounding terrain
and obstacles, whose
altitudes are also referenced
to
MSL.
System Status:
Terrain
Proximity requires
the
following
components
to
operate
properly:
.
valid 3-D
GPS
position
.
valid terrain/obstacle
database
If
Terrain
Proximity
does
not
have a
valid 3-D
GPS
position
a
yellow
"No
GPS
Position"
text
will
be
displayed
at
the center
of
the
Tenain Proximity
Page and on the
PFD inset
map
if
terrain
is
selected.
If
there
is not
a
valid
terrain/obstacle database,
the system
will
not display the
yellow
and
red
colors
associated
with
the
offending obstacles and terrain.
Operation
of Terrain
Proximity:
Terrain is displayed on the
following
pages:
.
Navigation Map
Page
.
Terrain
Proximity
Page
.
Trip Planning
Page
.
Flight
Plan Page
.
PFD
Inset
Map
To
display
terain
data
on
maps
other than the
Tenain Proximity
page,
select
the
MAP
softkey
(select INSET softkey for
the PFD inset map) on the
Navigation Map
Page
and then select
the
TERRAIN softkey.
When
Terrain
Proximity is
selected
on
maps
other than the
Terrain Proximity
Page,
an
icon to indicate the feature
is
enabled
for
display and a legend
for
Terrain
Proximity
colors are shown.
REPORT:
VB-2749
7-24
ISSUED: December 22, 2017