TM 55-1510-219-10
Figure 3-15. Dual NAV 1 - NAV 2 Control Panel (VIR-30AGM, VIR-30AG)
b.
Controls and Indicators.
(1)
NA V 1 Panel Section (VOR 1).
CONTROL/
FUNCTION
INDICATOR
Frequency
Displays selected frequency of
indicator
VOR 1 receiver.
Frequency
Selects operating frequency of
control
VOR 1 receiver.
VOL/OFF
Activates VOR 1 receiver. Per-
control
mits monitoring VOR 1 audio
and adjust volume of signals re-
ceived.
NAV TEST
Activates self test of VOR 1 nav-
switch
igation system.
(2)
NA V 2 Panel Section (VOR 2).
CONTROL/
FUNCTION
INDICATOR
VOL/OFF
Activates VOR 2 receiver. Per-
control
mits monitoring VOR 2 audio
and adjust volume of signals re-
ceived.
Frequency
Selects operating frequency of
control
VOR 2 receiver.
Frequency
Displays selected frequency of
indicator
VOR 2 receiver.
NAV TEST
Activates self test of VOR 2 nav-
switch
igation systems.
(3)
Marker Beacon Indicators. (fig. 2-28).
INDICATOR
FUNCTION
"A" indicators
Illuminate when aircraft passes
(white)
over an inner marker beacon.
"O" indicators
Illuminate when aircraft passes
(blue)
over an outer marker beacon.
"M" indicators
Illuminate when aircraft passes
(amber)
over a middle marker beacon.
(4)
Switches (fig. 2-28).
CONTROL
FUNCTION
Pilot's COURSE
Selects VOR receiver to control
INDICATOR
pilot's HSI.
switch
VOR 1
VOR 1 controls pilot's HSI.
VOR 2
VOR 2 controls pilot's HSI.
Copilot's
Selects VOR receiver to control
COURSE
copilot's HSI.
INDICATOR
switch
3-27
