Volume 1 of 2
15 December 1965
EXPLANATION OF THE NAVY TYPE DESIGNATION SYSTEM (cont'd)
Miscellaneous: To be used when a definite class is not available.
Special RF Devices (Not covered by any other classification). (Electronic switching, etc.)
Prime Movers and Accessories: All types except electrical.
Batteries: All types; parts and accessories.
Rectifier Power Units - Voltage Regulators - Copper Oxide Rectifiers: All types. A20 crystal detectors.
Instruments - Electrical Indicating and Recording.
Control Panels and Control Units. (Except motor controllers).
Switches: Manually operated.
Shields and Shielding Mater1Al: Finishes.
Keys - Telegraph: Manually operated.
Protective Devices: Static types.
Electromagnetic Contact Devices: All types.
Ranging Equipment - Radio (Localizer, rotating beacons, etc.)
Vacuum Tubes - Photo - Electric Cells: AUl types.
Piezo - Electric Crystals and Holders - Thermometers and Thermostats.
Compensators - Underwater Sound.
Transmitter - Receiver Units (Combined): Equipment in which the transmitter and receiver are not separable as units.
Receiver Units and Converters (RF to IF, etc) - Radio and Sound.
Capacitors: All types.
Head Telephones - Telephone Cords - Patch Cords - Loudspeakers - Plugs - Jacks - Sockets - Receptacles: All types.
Amplifier, Modulator and Coupler Units - Electronic Converters - Mixing Panels: All types (Complete diplex and duplex
units.) See 14 for electronic switching.
Microphones - Hydrophones - Underwater Sound Electrical Pickup Devices - Combination Handsets: All types.
Radio Transmitter Units: includes RF drivers for underwater sound equipment, etc.
Filter Units: All electrical types.
Sound Receiving Devices - Acoustical.
Indicators and Recorders: Radio, radar and underwater sound. (Indicating instruments under class 22.)
Television - Photo - Radio.
Test Equipment (Integral instruments under Class 22.) A60 Training Equipment (Operator trainers and instruction
Insulators and Insulating Mater1Al: Phenolic and ceramic.
Wires and Conductors - Junction Boxes. A62 RF Transmission lines and RF cables, etc.
Resistors: All types.
Static Recorders and Eliminators.
Remote Control Systems by Wire: Repeater systems, etc.
Automatic Systems, Facsimile, Tele-Automatic: Automatic keyers and recorders.
Secrecy Systems: Sending and receiving. (Speech scrambling.)
Direction Finding Equipment: Radio.
Distance Finding: A70 Radio Altimeters.
Portable Equipment - Field Sets.
Standards: (Including standardization notices, etc).
HF Underwater Sound Projector (above 10 kc) and supporting parts.