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| TB 430133
APPENDIX E
THE JOINT TYPE DESIGNATOR SYSTEM
"AN" indicates a System
MODEL
MODIFICATION
NUMBER
LETTER
AN/GRC122 C (X, Y or Z) (V)
INSTALLATION
TYPE OF
PURPOSE
CHANGES
VARIABLE
EQUIPMENT
IN VOLTAGE,
GROUPING
PHASE OR
SET OR EQUIPMENT LETTERS
INSTALLATION (1st Letter)
EQUIPMENT TYPE (2nd letter)
PURPOSE (3rd Letter)
A Airborne, Piloted Craft
A Invisible Light, Heat
A Auxiliary Assemblies
B
Underwater Mobile
B Pigeon
B
Bombing
C
Air Transportable
C Carrier (wire)
C
D
Pilotless Carrier
D Radiac
D
Direction Finding
F
Fixed Ground
F Photographic
E
Ejection and/or Release
G
Ground, General Use
G Telegraph or Teletype
G
Fire control or Searchlight
Directing
K
Amphibious
I Interphone/Public Address H Recording/Reproducing
M
Ground, Mobile Use
J Electromechanical
K Computing
P
Pack or Portable
K telemetering
L Searchlight Control
S
Water Surface Craft
M Maintenance and Test
Assemblies
T Ground, Transportable
M Meteorological
N Navigational Aids
U General Utility
N Sound in Air
P Reproducing
V Ground, Vehicular
P Radar
Q Special or Combination
Purposes
W Water Surface and
Q Sonar and Underwater
R Receiving, Passive Detecting
Underwater Purposes
Sound
Z Piloted and Pilotless
R Radio
S Detecting and/or Range and
Airborne Vehicle
Bearing, search
Combination
S
Special Types
T Transmitting
T
Telephone (wire)
W Automatic Flight or Remote
Control
V
Visual and Visible Light
X Identification And Recognition
W
Armament
Y Surveillance and Control
X
Facsimile or Television
Y
Data Processing
E-1/(E-2 blank)
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