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Replacement of ten-codes with the Clear Speech Procedure (Public Safety Department, Lakewood, Colorado, 1972) Was (Ten-Code) Now (Procedure Word) 10-0 Use Caution 10-1 Unable to copy – change location 10-3 Stop transmitting 10-4 Roger 10-5 Relay 10-6 Busy 10-7 Out at... 10-8 Clear 10-9 Say again 10-12 Stand by 10-13 Weather report/road report
Prosigns/operating signals may only be used with Morse Code (as well as semaphore flags, light signals, etc.) and TTY (including all forms of landline and radio teletype, and Amateur radio digital interactive modes). The most complete set of procedure words is defined in the U.S. Military's Allied Communications Publication ACP 125(G).
AN/PRC-6, somewhat battered from use. The AN/PRC-6 is a walkie-talkie (correctly a "Handie Talkie [1]) used by the U.S. military in the late Korean War era through the Vietnam War. Raytheon developed the RT-196/PRC-6 following World War II as a replacement for the SCR-536 "handy-talkie". The AN/PRC-6 operates using wide-band FM on a single ...
The SCR-536 weighed 5 pounds (2.3 kg) with batteries and 3.85 lb (1.75 kg) without batteries. The unit operated in AM voice mode between 3.5 and 6.0 MHz frequency range on any one of 50 channels. Plug in crystals and coils were used to control the frequency of the receiver and transmitter. The antenna was a 40 inch telescoping rod that slid ...
Quindar tones, most often referred to as the "beeps" that were heard during the American Apollo space missions, were a means by which remote transmitters on Earth were turned on and off so that the capsule communicator (CapCom) could communicate with the crews of the spacecraft. It was a means of in-band signaling to simulate the action of the ...
A walkie-talkie, more formally known as a handheld transceiver ( HT ), is a hand-held, portable, two-way radio transceiver. Its development during the Second World War has been variously credited to Donald Hings, radio engineer Alfred J. Gross, Henryk Magnuski and engineering teams at Motorola. First used for infantry, similar designs were ...
Police code. A police code is a brevity code, usually numerical or alphanumerical, used to transmit information between law enforcement over police radio systems in the United States. Examples of police codes include "10 codes" (such as 10-4 for "okay" or "acknowledged"—sometimes written X4 or X-4), signals, incident codes, response codes, or ...
AN/PRC-77 Portable Transceiver. AN/PRC 77 radio and handset. Soldier using a PRC-77 (top) with the KY-38 "Manpack," part of the NESTOR voice encryption system that was used during the Vietnam War. U.S. Marine carrying a PRC-77 during a training exercise in 1989. AN/PRC 77 Radio Set is a manpack, portable VHF FM combat-net radio transceiver ...