McDonnell Douglas A-4E Skyhawk, Manual

Page: 19 / 99

4. Startup
Nav Setup Procedure : AN/APN-153
1. Set AN/APN-153 Doppler Radar Set
to TEST and wait 5 min. (DO NOT
DO before power on)
2. After warm up time memory light
should extinguish and groundspeed
dial should read 121 ± 5 kts, drift
angle should read 0 ± 2 degrees
3. Turn to STBY
4. Prior to takeoff set selector switch
knob to ON-LAND or ON-SEA as
appropriate
5. Approximately 30 seconds after
aircraft has reached 150 kts and 40
ft of altitude, the memory light
should extinguish
6. After cruise altitude is attained,
ground speed and drift should read
within ± 50 kts and ± 10 degrees
respectively for known conditions of
flight
1, 3, 4
2, 5
2, 6
During flight:
Bank and turns should be limited to 30 degrees left or right/type of
terrain being flown over, or memory light will ignite, indicating loss
of tracking.
Climbs and descent should be limited to 25 degrees as this is near
operating limits. Memory light may ignite for no more than 3
seconds.