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  2. APCO radiotelephony spelling alphabet - Wikipedia

    en.wikipedia.org/wiki/APCO_radiotelephony...

    The APCO phonetic alphabet, a.k.a. LAPD radio alphabet, is the term for an old competing spelling alphabet to the ICAO radiotelephony alphabet, defined by the Association of Public-Safety Communications Officials-International [1] from 1941 to 1974, that is used by the Los Angeles Police Department (LAPD) and other local and state law enforcement agencies across the state of California and ...

  3. Police radio code - Wikipedia

    en.wikipedia.org/wiki/Police_radio_code

    In California, some radio codes in the 400–599 range that refer to vehicle violations are left over from the California Vehicle Code (CVC) which was revised in 1971. Some agencies, such as the California Highway Patrol (CHP) use the current vehicle code numbers while municipal and county police agencies, especially the Los Angeles Police ...

  4. Call sign - Wikipedia

    en.wikipedia.org/wiki/Call_sign

    Russian nuclear icebreaker Arktika with call sign UKTY. Merchant and naval vessels are assigned call signs by their national licensing authorities. In the case of states such as Liberia or Panama, which are flags of convenience for ship registration, call signs for larger vessels consist of the national prefix plus three letters (for example, 3LXY, and sometimes followed by a number, e.g. 3LXY2).

  5. Aerial roof markings - Wikipedia

    en.wikipedia.org/wiki/Aerial_roof_markings

    The New South Wales Rural Fire Service fits aerial identification numbers to rural fire appliances with the format consisting of the letter "B" (for Bush Fire) and the last 4 digits of the vehicles RTA approved operations plate. Example: "BF-07967" allocates an aerial ID of "7967". These markings do not denote a vehicles callsign. [2]

  6. Call signs in the United States - Wikipedia

    en.wikipedia.org/wiki/Call_signs_in_the_United...

    Most of the first broadcasting stations received randomly assigned three-letter call signs. However, in early 1922, due to the prospect of all the available three-letter call signs being used up, the government switched to four-letter calls that were sequentially assigned. Initially two different patterns were employed.

  7. California Highway Patrol - Wikipedia

    en.wikipedia.org/wiki/California_Highway_Patrol

    The California Highway Patrol (CHP) is the principal state police agency for the U.S. state of California. The CHP has primary patrol jurisdiction over all California highways and roads and streets outside city limits, and can exercise law enforcement powers anywhere within the state. The California Highway Patrol can assist local and county ...

  8. Ten-code - Wikipedia

    en.wikipedia.org/wiki/Ten-code

    A standard message form for use by all police departments. A simple code for service dispatches relating to corrections, repetitions, etc. A standard arrangement of the context of messages, (for example, name and description of missing person might be transmitted as follows: Name, age, height, weight, physical characteristics, clothing; if car ...

  9. NATO phonetic alphabet - Wikipedia

    en.wikipedia.org/wiki/NATO_phonetic_alphabet

    This is an accepted version of this page This is the latest accepted revision, reviewed on 15 February 2025. Letter names for unambiguous communication Not to be confused with International Phonetic Alphabet. Alphabetic code words A lfa N ovember B ravo O scar C harlie P apa D elta Q uebec E cho R omeo F oxtrot S ierra G olf T ango H otel U niform I ndia V ictor J uliett W hiskey K ilo X ray L ...