RAZAIR
‐
A1
‐
METRO
‐
III
‐
AFM
‐
001
2
‐
12
Fig.
90
DG
Selector
switch.
Fig.
91
DG1
Selected.
Fig.
92
DG2
Selected.
Fig.
93
DG
Selector
switch
location
(Pilot’s
position).
While
both
the
Pilot
and
Copilot
can
have
the
same
primary
nav
source
by
default
the
Pilot
and
Copilot’s
primary
nav
sources
are
crossed,
i.e.:
NAV1
is
the
default
for
the
Pilot
while
NAV2
is
the
default
for
the
Copilot.
DG1:
Selects
NAV1
as
the
primary
nav
source
for
course
pointer.
It
can
be
easily
identified
by
its
green
color.
DG2:
Selects
NAV2
as
the
primary
nav
source
for
course
pointer.
It
can
be
easily
identified
by
its
blue
color.
BEARING
POINTERS
FOR
NAV1
&
NAV2
The
EHSI
provides
two
independent
bearing
pointers
which
function
in
the
same
way
as
a
traditional
radio
magnetic
indicator
(RMI)
for
both
the
primary
and
secondary
nav
sources.
NAV1
Course
Pointer
NAV1
Bearing
Pointer
NAV2
Bearing
Pointer
NAV2
Bearing
Pointer
NAV2
Course
Pointer
NAV2
Bearing
Pointer
DG1
Course
and
Bearing
pointers
DG2
Course
and
Bearing
pointers
The
head
of
the
bearing
pointer
indicates
bearing
to
the
nav
source
and
the
tail
indicates
bearing
from
the
nav
source
(radial).