48 relations: ACP 131, Air traffic control, Altimeter setting, Amateur radio, Amateur radio operator, American Radio Relay League, Atmospheric pressure, Aviation, Bletchley Park, Brevity code, Call sign, Combined Communications-Electronics Board, Contact (amateur radio), Government, International Civil Aviation Organization, International Code of Signals, International maritime signal flags, International Radiotelegraph Convention (1912), International Telecommunication Union, ITU prefix, ITU-R, Language, Lorenz cipher, Maritime Mobile Service Q Codes, Miami–Dade County, Florida, Mnemonic, Morse code, NATO, NOTAM Code, Operating signals, Postmaster General of the United Kingdom, Pressure altitude, Prosigns for Morse code, QN Signals, QNH, QRA locator, QRP operation, QSK operation (full break-in), QSL card, QST, Radio atmospheric, Radioteletype, Spark-gap transmitter, Ten-code, Transceiver, United Kingdom, Wireless telegraphy, Z code.
ACP-131 is the controlling publication for the listing of Q codes and Z codes.
Air traffic control (ATC) is a service provided by ground-based air traffic controllers who direct aircraft on the ground and through controlled airspace, and can provide advisory services to aircraft in non-controlled airspace.
Altimeter setting is the value of the atmospheric pressure used to adjust the sub-scale of a pressure altimeter so that it indicates the height of an aircraft above a known reference surface.
Amateur radio, also known as ham radio, describes the use of radio frequency spectrum for purposes of non-commercial exchange of messages, wireless experimentation, self-training, private recreation, radiosport, contesting, and emergency communication.
An amateur radio operator is someone who uses equipment at an amateur radio station to engage in two-way personal communications with other amateur operators on radio frequencies assigned to the amateur radio service.
The American Radio Relay League (ARRL) is the largest membership association of amateur radio enthusiasts in the USA.
Atmospheric pressure, sometimes also called barometric pressure, is the pressure within the atmosphere of Earth (or that of another planet).
Aviation, or air transport, refers to the activities surrounding mechanical flight and the aircraft industry.
Bletchley Park was the central site for British (and subsequently, Allied) codebreakers during World War II.
Brevity codes are used in amateur radio, maritime, aviation and military communications.
In broadcasting and radio communications, a call sign (also known as a call name or call letters—and historically as a call signal—or abbreviated as a call) is a unique designation for a transmitter station.
The Combined Communications-Electronics Board (CCEB) is a five-nation joint military communications-electronics (C-E) organisation whose mission is the coordination of any military C-E matter that is referred to it by a member nation.
An amateur radio contact, more commonly referred to as simply a "contact", is an exchange of information between two amateur radio stations.
A government is the system or group of people governing an organized community, often a state.
The International Civil Aviation Organization (ICAO Organisation de l'aviation civile internationale, OACI), is a specialized agency of the United Nations.
The International Code of Signals (ICS) is an international system of signals and codes for use by vessels to communicate important messages regarding safety of navigation and related matters.
International maritime signal flags refers to various flags used to communicate with ships.
The International Radiotelegraph Convention (1912) established an agreement to allow the exchange of radio telegraphs (with the intention to connect this new network to wired telegraph).
The International Telecommunication Union (ITU; Union Internationale des Télécommunications (UIT)), originally the International Telegraph Union (Union Télégraphique Internationale), is a specialized agency of the United Nations (UN) that is responsible for issues that concern information and communication technologies.
The International Telecommunication Union (ITU) allocates call sign prefixes for radio and television stations of all types.
The ITU Radiocommunication Sector (ITU-R) is one of the three sectors (divisions or units) of the International Telecommunication Union (ITU) and is responsible for radio communication.
Language is a system that consists of the development, acquisition, maintenance and use of complex systems of communication, particularly the human ability to do so; and a language is any specific example of such a system.
The Lorenz SZ40, SZ42a and SZ42b were German rotor stream cipher machines used by the German Army during World War II.
Part of a larger set of Q Codes designated by the ITU-R, the QOA–QQZ code range is reserved for the Maritime Mobile Service.
Miami-Dade County is a county located in the southeastern part of the U.S. state of Florida.
A mnemonic (the first "m" is silent) device, or memory device, is any learning technique that aids information retention or retrieval (remembering) in the human memory.
Morse code is a method of transmitting text information as a series of on-off tones, lights, or clicks that can be directly understood by a skilled listener or observer without special equipment.
The North Atlantic Treaty Organization (NATO; Organisation du Traité de l'Atlantique Nord; OTAN), also called the North Atlantic Alliance, is an intergovernmental military alliance between 29 North American and European countries.
NOTAM Code is an aeronautical radiotelegraph and radiotelephony brevity code used to transmit information about radio navigation aids, airports, lighting facilities, dangers to aircraft, and actions related to search and rescue.
Operating signals are one type of brevity code wherein the signals are designed and used primarily to support the communication of the communications (radio and telegraph) operators among themselves with respect to communications operations, instead of communicating abbreviated messages about non-communications related activities.
The Postmaster General of the United Kingdom was a Cabinet-level ministerial position in HM Government.
Pressure altitude within the atmosphere is the altitude in the International Standard Atmosphere (ISA) with the same atmospheric pressure as that of the part of the atmosphere in question.
Procedure signs or prosigns are shorthand signals used in radio telegraphy procedures, for the purpose of simplifying and standardizing communications related to radio operating issues among two or more radio operators.
The QN Signals are Morse code operating signals that were introduced for Amateur radio net operation in 1939 on the Michigan QMN Net to lighten the burdens of net control operators.
QNH is a Q code indicating the atmospheric pressure adjusted to mean sea level.
The QRA locator, also called QTH locator in some publications, is an obsolete geographic coordinate system used by amateur radio operators in Europe before the introduction of the Maidenhead Locator System.
In amateur radio, QRP operation refers to transmitting at reduced power while attempting to maximize one's effective range.
Turning over a communications channel is the change in communications protocol transmission status that occurs when a transmitting station releases transmitting control of a communications channel thus turning it over to allow another station to transmit.
A QSL card is a written confirmation of either a two-way radiocommunication between two amateur radio stations or a one-way reception of a signal from an AM radio, FM radio, television or shortwave broadcasting station.
QST is a magazine for amateur radio enthusiasts, published by the American Radio Relay League (ARRL).
A radio atmospheric signal or sferic (sometimes also spelled "spheric") is a broadband electromagnetic impulse that occurs as a result of natural atmospheric lightning discharges.
Radioteletype (RTTY) is a telecommunications system consisting originally of two or more electromechanical teleprinters in different locations connected by radio rather than a wired link.
A spark-gap transmitter is a device that generates radio frequency electromagnetic waves using a spark gap.
Ten-codes, officially known as ten signals, are brevity codes used to represent common phrases in voice communication, particularly by law enforcement and in Citizens Band (CB) radio transmissions.
A transceiver is a device comprising both a transmitter and a receiver that are combined and share common circuitry or a single housing.
The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain,Usage is mixed with some organisations, including the and preferring to use Britain as shorthand for Great Britain is a sovereign country in western Europe.
Wireless telegraphy is the transmission of telegraphy signals from one point to another by means of an electromagnetic, electrostatic or magnetic field, or by electrical current through the earth or water.
Z Code (like Q Code and X Code) is a set of operating signals used in CW, TTY and RTTY radio communication.