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US ARMY-NAVY EQUIPMENT DESIGNATIONS
Letter Symbols Used in Making Basic Indicators
First Letter
Installation Second Letter
Type of Equipment Third Letter
PurposeA - Airborne (installed assemblies and operated in aircraft) operating A - Auxiliary (not complete sets) B - Pigeon C - Air transportable C - Carrier (wire) C - Communications D - Pilotless carrier D - Direction finder F - Ground, fixed F - Photographic G - Ground, general use G - Telegraph or teletype (wire) G - Gun directing I - Interphone or public address K- Amphibious control K- Telemetering L- Countermeasures L - Searchlight M- Ground, mobile M- Meteorological M - Maintenance and test assemblies, also tools N - Sound in air N - Navigational P- Pack or portable P- Radar P - Reproducing, photographic or sound Q- Underwater sound Q - Special types R - Radio R - Receiving S - Shipboard S - Special types S - Search and/or detecting T- Ground, transportable T- telephone (wire) T - Transmitting U - General utility V- Ground, vehicular V - Visual and light W - Remote control X - Facsimile and television X - Identification and recognition
US ARMY-NAVY COMPONENT DESIGNATIONS
Component
indicator |
Description
|
AB | Antenna base |
AM | Amplifier |
AS | Antenna System |
AT | Antenna |
BA | Battery, dry |
BB | Battery, storage |
C | Control box |
CG | Radio
frequency cable transmission lines and waveguides with terminals |
CM | Comparator |
CN | Compensators, regulators |
CP | Computer |
CR | Crystal units |
CU | Coupling units |
CV | Converter (electronic) |
CW | Cover |
CX | Cord |
CY | Case |
DY | Detector, non-electronic (see CV) |
DY | Dynamotor unit |
F | Filters |
G | Generator (see PU) |
GO | Goniometer |
H | Headsets, handsets, head and chest sets |
ID | Indicator |
J | Junction, jack and terminal boxes |
KY | Keyers, coders and interrupters |
LS | Loudspeaker |
M | Microphone |
MD | Modulator |
MK | Maintenance kit |
MT | Meteorological apparatus |
MT | Mountings |
MX | Miscellaneous |
O | Oscillator |
PG | Pigeon articles |
PH | Photographic articles |
PP | Power pack |
PU | Power unit and motors |
R | Radio receiver |
RD | Recorder |
RE | Relay assembly |
RF | Radio frequency unit |
RG | Radio
frequency cables, transmission lines and waveguides |
RL | Reel assembly |
RT | Receiver and transmitter |
S | Shelter |
SA | Switching assembly |
SB | Switchboard |
SN | Synchroniser |
T | Radio transmitter |
TA | Telephone apparatus |
TD | Timing device |
TH | Telegraph apparatus |
TK | Tool kits |
TS | Test and measuring apparatus |
TT | Teletypewriter and wire facsimile apparatus |
U | Unions, plugs, sockets, connectors, etc. |
UG | Unions,
plugs, sockets, connectors, etc. designed for radio frequencies |
V | Vehicles |
VS | Visual signalling apparatus |
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