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Radar beacon. Racon signal as seen on a radar screen. This beacon receives using sidelobe suppression and transmits the letter "Q" in Morse code near Boston Harbor (Nahant) 17 January 1985. Radar beacon (short: racon) is – according to article 1.103 of the International Telecommunication Union's (ITU) ITU Radio Regulations (RR) [1 ...
ACP-131 is the controlling publication for the listing of Q codes and Z codes. It is published and revised from time to time by the Combined Communications Electronics Board (CCEB) countries: Australia, New Zealand, Canada, United Kingdom, and United States.
Delay code properties cover nine category sets for delay. Each category set can be described using either a two-digit number code or a two letter alpha code; most airlines use the numeric format, but some prefer the alpha.
Brevity codes are used in amateur radio, maritime, aviation and military communications. They are designed to convey complex information with a few words or codes. Some are classified from the public. List. ACP-131 Allied military brevity codes; ARRL Numbered Radiogram
List of device numbers and acronyms. 1 - Master Element. 2 - Time-delay Starting or Closing Relay. 3 - Checking or Interlocking Relay, complete Sequence. 4 - Master Protective. 5 - Stopping Device, Emergency Stop Switch. 6 - Starting Circuit Breaker.
This is a list of aircraft registration prefixes used by civil aircraft: Current (post-1928) allocations [ edit ] The 1928 markings have been amended and added to over the years, with the current markings being:
A. Abbreviated dialing. All-number calling. Area code split. Area codes in the Caribbean. Arogyavani. Automatic number announcement circuit.
An infrared spectroscopy correlation table (or table of infrared absorption frequencies) is a list of absorption peaks and frequencies, typically reported in wavenumber, for common types of molecular bonds and functional groups.
List of ISO 15924 codes by letter code. Under-ConScript Unicode Registry – Encoding of artificial scripts. Categories: Writing systems. ISO 15924. Writing-related lists.
The following is a partial list of the "C" codes for Medical Subject Headings (MeSH), as defined by the United States National Library of Medicine (NLM). This list continues the information at List of MeSH codes (C08) .