3-30. Weather Radar Set (AN/APN- 215(V) 1).
(4) TILT control. Varies the elevation angle of
radar antenna 15 degrees up or down from horizontal
attitude of aircraft.
provides a visual presentation of the general sky area of
(5) 60 switch. Push on/push off type switch.
approximately 120 degrees around the nose of the
aircraft, extending to a distance of 240 nautical miles.
When activated, reduces antenna scan from 120
The presentation on the screen shows the location of
degrees to 60 degrees.
potentially dangerous areas, such as thunderstorms and
hailstorms, in terms of distance and azimuth with respect
(6) TRACK switches . Momentary action type
to the aircraft. The radar is capable of ground mapping
switches. When activated, a yellow track line extended
operations. Radar antenna stabilization signals are
from the apex of the display through top range mark
supplied by the vertical gyro. The antenna is a flat-plate,
appears and moves either left or right, depending on the
nose mounted unit (fig. 2-1). Protection is provided by a
switch pressed. The track line position will be displayed
5-ampere circuit breaker, placarded RADAR, located on
in degrees in the upper left corner of the screen. The
line will disappear approximately 15 seconds after the
switch is released. It will then automatically return to 0
b. Controls and Functions.
(1) GAIN control.
Used to adjust radar
(7) HOLD switch.
Push on/push off type
receiver gain in the MAP mode only.
switch. When activated, the last image presented before
pressing the switch is displayed and held. The word
(2) STAB OFF switch. Push on/push off type
HOLD will flash on and off in the upper left corner of the
switch. Used to control antenna stabilization signals.
Pressing the switch again will update the
display and resume normal scan operation.
(3) RANGE switches . Momentary action type
When pressed, clears the screen and
(8) Function switch. Controls operation of the
increases or decreases the range depending on switch
STAB OFF switch
60 scan switch
MODE select switches
Figure 3-20. Weather Radar Control/Indicator (AN/APN-215(V))
3-36 Change 5