US ARMY-NAVY EQUIPMENT DESIGNATIONS
Letter Symbols Used in Making Basic Indicators
Installation
Type of Equipment
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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