NAVIGATOR’S EQUIPMENT FUNCTIONAL PROCEDURES
APN-59 RADAR
A.
Pressurization:
1 Hold the switch in the “Momentary On” position until
the gage
indicates
40 inches of Mercury.
2. The system should hold pressure with in 2 in. Hg.
For ten
minutes. CAUTION.
At no time should pressure be allowed to
exceed 41
in. Hg. Or structural damage may result.
3. After the ten minute interval, depress the bleed
valve until
system
pressure reads 27 to 32 in. Hg. Do not
operate the radar set
until these
readings are obtained.
B.
Radar Turn On
Procedures:
1 Position all controls on the panel fully CCW, down or
off.
Position intensity and range marks fully CCW; heading
marker,
range delay
control, and range 3-30 control fully CW.
Pilot’s
repeater
scope intensity CCW.
2. Position the
function switch to stand by. Allow three
minutes
for warm
up.
3. Range control switch to 30/5 (avoid using the
warning function,
100/20 or 240/30 ranges for the first ten minutes of
operation).
4. Function switch to “Search”
May
1970
5. Check voltage
a.
Line 0.6 +/- .08 and steady.
b.
Mag.0.65 +/- .35 and steady
c.
Mixer and AFC 0.65 +/- and steady
6. Select range of desired scan.
7. Select intensity so that sweep is just below
visibility.
8. Set range marks and heading marker and check focus.
9. Range marker calibration.
a.
Superimpose the variable range marker over the 20
NM range mark on the
and check the variable marker is still on twenty
miles. Switch to
100/20 and again check that the variable marker is on
twenty
miles.
b.
Select the 240/30 and superimpose the variable range
marker on thirty miles range.
Switch to 50/10 and check to see
that the marker is on thirty miles. Switch to
check to see that the variable marker is on thirty miles.
c.
On
miles is on the scope.
Superimpose the variable range marker over
r the ten mile range.
Switch to
variable marker is still on ten miles.
May 1970 2
d. If error is noted use caution in the use of radar
until it is
determined which ranges, if either, is correct. Multiple bearing
fixing is advisable.
Write up deviations of the range marks in the
781.
10. Adjust tilt and gain as required.
Turn Off
Procedures:
1. Position the intensity range and heading mark
controls on the
synchronizer/ indicator fully clockwise.
2. The radar control panel shut down sequence: Gain control fully
counter clockwise, SCAN switch Off, STAB switch to Off,
function switch to stand by, and all remaining controls to
down,
off, zero, or fully counter clock wise.
3. After 30 seconds, turn the function switch off.
II.
N-1 COMPASS PREFLIGHT
1. The
N-1 compass systems require ten minutes for warm up.
2.
Turn the latitude correction pointer to Off.
3.
Synchronize the master indicator.
4.
Compare the master indicator with the pilot’s stand by
magnetic
compass.
5.
De-synchronize the master indicator in CW direction. Annunciator
moves
right. White dot rotates CCW.
3 May 1970
6. De-synchronize the master indicator in CCW
direction.
Annunciator
moves left. White dot rotates CW.
7.
Move the latitude correction pointer out of the Off detent.
a. N 90°- Dot moves CW.
b. 0° - Dot stops. If dot does not completely stop rotating,
move
latitude
correction pointer until it does. This
point is then the correct
0°latitude. Correction should be applied to all
latitudes. i.e.
Dot
stops
rotating at 4° S – correction is -4 to North latitude and +4 to
South latitude.
c. S 90°- Dot moves CCW.
8.
Rotate the synchronizer knob through 360° All RMIs should
follow
smoothly (allowable tolerance +/+- 2° from N-1). Repeat in
opposite
direction.
9.
Return latitude correction pointer to Off position. Synchronize
master
indicator, and check against the magnetic standby compass to
prevent
synchronization 180° off.
III.
C-12 COMPASS PREFLIGHT.
1.
Check power adequacy indicator. Red
indicator means power is
OFF. Allow five minutes for warm up.
2. Set
latitude N-S switch to correct latitude.
3.
Rotate latitude knob to set present aircraft position in degrees of
latitude
under the
May
1970
Index.
(Reset in-flight as required.)
4. Set
desired compass mode (Mag. Or D.G.)
5. If
Mag. Has been selected, allow the Annunciator needle
to center
automatically
or manually synchronize the system with the
synchronizing
control. Check against the magnetic
stand by
compass.
6. If
D.G. position has been selected, set the desired heading in the
heading windows
with the synchronizing control.
IV.
APN 147 DOPPLER.
A. Turn On Procedures:
1. Set
power switch to Slew. Allow one minute
for warm up.
2.
Slew in preflight values of 0°drift and 165 knots ground speed.
3. Set
the
4. Set
power switch to On during takeoff roll.
B.
Turn Off procedures:
1.
Turn power switch to Off. (NOTE. Spare
fuses (2) are located on
frequency
tracker in cargo compartment forward over head rack.)
5 May 1970
V. ASN
35 COMPUTER
A. Turn On Procedures:
1. Set
desired Mag. Course.
2. Set
distance to go.
3. Set
cross track indicators to right 000 or as required.
4.
Position distance scale to Nav or Drop as required.
5.
Position mode switch doe desired cross track operation.
6.
Select desired stage.
7. Set
function switch to manual or automatic as desired.
B.
Turn Off procedures:
1.
Turn function switch to Off.
VI.
APN 133 RADIO ALTIMETER.
A. Turn On Procedures:
1. Turn
receiver gain CW for power On. Allow
three minutes for
warm up.
2.
Adjust receiver gain and circle size.
3. Set
zero adjustment (CCW edge).
May 1970 6
B.
Turn Off procedures:
1.
Turn receiver gain full CW. (NOTE. Spare fuse located in
transceiver
unit under flight deck.)
VII.
ARN 6 RADIO COMPASS.
1.
Turn on to Ant position. Allow five
minutes for warm up.
2.
Tune and identify station in
3.
Turn selector to ADF position, check bearing indicator for correct
bearing.
4.
Place CW – voice switch in CW position as required.
5.
Turn selector to
control and
check bearing.
6.
Turn band switch to 850 – 1750 position, dial to low end of the
band and
check alignment mark under the reference line.
7. To
turn the set off, position the function switch to Off.
7 May 1970
VIII. APN 70 LORAN.
A. Alignment Check:
1. Turn master X-Z gain CW for power. Allow five minutes for
warm up.
2. Set function selector to the five position.
3. Select W delay and align 100 MS markers. Counters should read
in increments of 100 +/- MS.
4. Repeat step 3 using Y delay.
B. Drop Out Point Check:
1. Set channel 1, function 4, W delay, rate H-7.
2. On W counter set approximately 12,000
3. Pull W delay crank out and turn CW until lower trace
disappears.
Counter should be 13025 +/- 10.
4. Repeat procedure for Y delay.
5. Continue checking all R-rates on both delays.
H-7 13025 L-7 18025 S-7 23025
H-6 13075 L-6 18075 S-6 23075
H-5 13125 L-5 18125 S-5 23125
H-4 13175 L-4 18175 S-4 23175
H-3 13225 L-3 18225 S-3 23225
H-2 13275 L-2 18275 S-2 23275
H-1 13325 L-1 18325 S-1 23325
H-0 13375 L-0 18375 S-0 23375
May 1970 8
C: Operation:
1. Turn master X-Z gain CW for power.
Allow five minutes for warm up.
2. Set local-distant switch as required.
3. Select desired station with channel and R-rate
selectors.
4. Select function 1.
5. ADC switch On.
6. Position leading pulse on top pedestal with L-R
switch.
7. Obtain LOP using functions 1, 2, & 3.
D. Turn Off Procedure:
1. Position master X-Z gain switch full CCW.
X. D-1 PERISCOPIC SEXTANT MOUNT.
1. Remove drain plug and check for water accumulation.
2. Insert sextant in mount and check illumination of
counter, dial, and
the bubble lamps.
3. Set 000.0° in the azimuth counter. Read 000° +/- 1° against the
index mark on the azimuth ring. Adjust if required according to page
13-19, Volume III, AFM 51-40.
9 May 1970
4. Set 180.4 in the azimuth window. Sight on the HF antenna
attaching bolt on the vertical stabilizer. Read 000 +/- ¼°under the
vertical.
a. for errors under 2°, rotate the projection lens until
the azimuth
scale reads 0
b. for errors between 2°and 10°, loosen the rubber line
clamping
screws and r…… for zero error.
X. D-1 PERISCOPIC SEXTANT.
1. Check for presence of power cable and spare bulbs in
storage case.
2. Inspect glass window at the tip of periscope for
cleanliness.
3. Check silica gel indicators for moisture. Locations of silica gel
are:
a. In the sextant case.
b. At the end of the periscope.
c. On the side of the sextant. (if
moisture is present the gel will be
pink. If completely
saturated – white.)
4. Actuate the rewind mechanism and c …… for 00 on the
timer dial
and for a clear field of vision.
5. Tilt sextant and with the bubble …. Knob form a
bubble of 1½ to 2
times the size of the apparent sun. Return the sextant to vertical
position and rotate the bubble control to full …….
May 1970 10
6. Depress the averager actuating button. Check that the averager
operates
for 2 minutes +/- 2 seconds.
7. Rewind the averager.
Set 3900 in the altitude window.
Start the
averager
and let it run for one minute. Stop the
averager and set 4100
in the
altitude window. Restart the averager
and let it run to the end
of cycle.
8. Align the indices and the averager should read 40000
+/- 2
minutes.
11 May
1970