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temperatum is below freezing with heavy rain, or expected
to drop below freezing with heavy rain, the aircraft
may be parked with wings forward (20’) and flaps
in the full down position.
18.4.7 Before Leaving Aircraft. Weather permitting,
leave the canopy partially open to allow for air
circulation. This will helu urevent canonv crackinu from
18.5 HOT-WEATHER AND DESERT
OPERATIONS
Check for accumulation of sand or dust in the intakes.
Normal starting procedures will be employed.
Normal operatingp roceduresa ao utlined in Chapter7 ,
Shore-BasedP rocedures,s hould be adheredt o with the
following additions and exceptions:
1. Expect higher temperatures than normally obtained
in operating ranges.
2. Engine ground operation should be minimized as
much as possible.
18.51 Taxiing. While taxiing in hot weather, the
canopiesm ay be opened,i f necessaryt,o augmentc rew
comfort.
Do not operate the engines in a sand or dust
storm, if avoidable. Park the aircraft crosswind
and shut down the engines to minimize.
damage Corn sand or dust.
18.5.2 Takeoff. The required takeoff distances are
increasedb y a temperaturein creaseC. heckt he applicable
rakeoffdistancech;utsinNAVAIROI-F14AAP-1.1.
Do not attempt takeoff in a sand or dust
storm, if avoidable, to prevent sand or dirt
from blowing into the intake ducts and causing
engine damage.
18.5.3 Landing. Anticipate a slightly longer landing
distance and the possibility of turbulence because of
thermal action of the air close to the ground. Use the
defoggings ystemi f necessaryi,n warm, humid weather.
ORIGINAL 18-8
PART VII
Communications-Navigation Equipment
and Procedures
chapter 19 - communicatioIls
Chapter2 0- Navigathn
Chapter2 1- Identification
I
87 (ReversBe lati) ORIGINAL

NAVAIR 91.Fl4AAD-1
CHAPTER 19
Communications
19.1 COMMUNICATIONS AND ASSOCIATED
EQUIPMENT
Figure 19-l lists the CNI equipment associatedw ith
the aircraft/weapons systems.
Operation of electronic equipment for more
than 5 minutes without adequatec ooling will
permanently damage the equipment.
19.1.1 Communications Antennas. Four ViUHF/
L&and, dual-bladea ntennapsr ovide omnidirectionacl overage
for V/UHF voice, JTIDS voice, UHF D/L, JTIDS
Link 16,t acan,a ndI FF/SIF transpondeorp erationV. AJHF
2,lTIDSvoiceanddata,andtacanshamonesetofantennas;
theupperisimmediatelyatIofthecanopyturtlebackandthe
lowerisembeddedintheleftventral~.TheVNHFl,D/L,
and lFF/SIF sham the second set; the upper is the second
antennaa ft of the canopyt urtlebacka ndt hel ower is emheddedi
n ther ight ventralt in. Eachs ystemi s connectedto the
appmpriatep ortion of anu ppera ndl ower antennath rough
a coaxial switch and diplexer. For information on the
AN/ASW-27 DL (Link 4), and JTIDS (Link 16), refer to
NAVAIROI-F14AAD-IA.
The AF’X-76 IFF interrogator antenna is an integral
partoftheradarantenna. SeeFO-1 andFO-2 forantenna
locations.
19.1.2 Communications Antenna Selection.
Selection of the upper or lower antenna for use by the
two communication radios and the D/L or JTIDS is
manual and is controlled by switches on the RIO ANT
SEL panel (Figure 19-2). The D/L is always on the
opposite antenna from V/UHF 1. Antenna selection for
the IFF/SIF can be either automatic or manual. The ANT
switch on the IFF control panel controls antenna selection
and is described in Chapter 21. Tacan antenna selection
is completely automatic. If a signal is lost or is
too weak to maintain receiver lockup, the tacan cycles
between the upper and lower seeking a stronger signal.
See Chapter 20 for tacan operation.
19.1.3 Mutual Interference. Mutual interference
among the ViUHF communication radios and between
the V/UHF communication radios and D/L. can OCCUI:
In the UHF band, minimize mutual interference by selecting
opposite antennas or a !?equency sepamtion Of
at least 55 MHZ between radios if both are being used.
When D/L is in use, mutual interference can be minimized
by using VHF channels for voice c~mmunicetions.
If this is not possible, frequency separatioo of at
least 55 MHz and selection of opposite antennas for
voice and DiL. are recommended.I f necessaryV, /UHF
1 or2 can be shut off. UHF communications interference
with D/L may cause the TILT computer message to
appear and the autopilot ACL or VECPCD mode to
disengage. D/L interference with the radios may cause
audible chirping at the D/L message reply rate.
In the VKF band, both radios should not be operated
　
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