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TRU Transformer rectifier unit
TSEC Transmission security
TV Television
TVS Television sensor, television system
U
UHF Ultra high frequency
UNL Unlatched
UPD Update
UPDT Update
USB Upper side band
UTC Universal time coordinated synchronized time
UTM Universal transverse mercator
UWP Universal weapons pylon
V
V Volts
VAC Volts alternating current
VAR Variation
VDC Volts direct current
VDU Video downlink/uplink
VEL Velocity
VFR Visual flight rules
VHF Very high frequency
VID Video
VIXL Video image crosslink
VNE Velocity, never exceed (airspeed limitation)
B-12
TM 1-1520-248-10
VOL Volume
VOX Voice activated communication
VPS Video processor subsystem
VSD Vertical situation display
VSDS Vertical scale display subsystem
VTR Video tape recorder
VTS Video tracker system
W
WARN Warning
WFOV Wide field of view
W HOT White hot
WHT White
WL Water line
WOD Word of the day
WPN Weapon
WPT Waypoint
WRN Warning
WSPS Wire strike protection system
X
XDCR Transducer
XFER Transfer
XMIT Transmit
XMSN Transmission
XMT Transmit
XMTR Transmitter
XTK Crosstrack
B-13/(B-14 blank)
TM 1-1520-248-10
APPENDIX C
SPECIAL MISSION
C-1. GENERAL. the Multifunction Displays. An antenna is
mounted on the lower center section of the
This appendix provides description and operating helicopter. A TACAN circuit breaker is located
procedures for those systems peculiar to the OH-58D on the auxiliary overhead circuit breaker
Special Mission helicopter. panel.
C-2. RESCUE LADDERS. 2. Operation. DATA NOT AVAILABLE.
1. Description. Two rescue ladders are
provided. A ladder is located on each side
weapons pylon arm. The ladders are stowed
in a metal housing. A mechanical release
cable for each ladder is routed forward to
release handles located on each side of the
center console at the instrument panel
intersect.
2. Operation. The rescue ladders are released
by pulling the release handle located on each
side of the center console. Refer to TM 1-
1520-248-23, Chapter 2.
C-3. ACOUSTIC BEACON.
A salt water activated, battery powered acoustic
beacon is mounted on the aft side of the CPG seat
bulkhead. Refer to TM 1-1520-248-23.
C - 4 . WEIGHT ON GEAR I N T E R R U P T
SWITCH.
A weight on gear interrupt switch is located directly
above the pilot MFD. The switch is labeled NORM/
INTERPT. When the switch is in the INTERPT position,
continuous navigation alignment may be accomplished
when operating aboard ship.
C-5. BASEBAND/DIPHASE SWITCH.
The baseband/diphase switch is located adjacent to the
weight on gear interrupt switch. The switch allows a
frequency switch for Army/Navy channels as required.
C-6. AN/ARN-153 TACAN.
1. Description. The AN/ARN-153 TACAN
navigation set is located in the aft electrical
compartment. The system operates through
C-1/(C-2 blank)
TM 1-1520-248-10
ALPHABETICAL INDEX
Subject Paragraph Subject Paragraph
Figure, Table Figure, Table
Number Number
A A (Cont)
Abort Start/Hot Start/Residual Fire . . . . . . . . . . . . . . . 9-33
AC Electrical Power Distribution System . . . . . . . . . . 2-68 AN/ALQ-144 IR Jammer
AC External Power Receptacle . . . . . . . . . . . . . . . . . . . 2-71 Countermeasures Set . . . . . . . . . . . . . . . . . . . . . . . . . . 4-44
AC GEN FAIL Caution Message . . . . . . . . . . . . . . . . . . 9-43 AN/ALQ-144 IR Jammer Set Controls
AC Generator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-69 and Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .F4-33
Acceptable Track Gate/Spot AN/APR-44 Radar Warning System . . . . . . . . . . . . . . . 4-42
Relationship TIS Spot . . . . . . . . . . . . . . . . . . . . . . . . .F4-17 AN/ARC-201 SINCGARS Frequency
Acceptable Track Gate/Spot Hopping Control Pages . . . . . . . . . . . . . . . . . . . . . . . . . 3-19
Relationship TV Spot . . . . . . . . . . . . . . . . . . . . . . . . . .F4-16 AN/ARC-201 SINCGARS Frequency
ACKS Thread . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-212 Hopping Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-18
Acoustic Beacon. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .C-3 AN/ARC-201 SINCGARS Late Net
Acquire-on-the-Move Procedures  Entry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-21
IMSP/MMS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-25 AN/ARC-201 SINCGARS Loading/
　
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