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  2. Emergency position-indicating radiobeacon - Wikipedia

    en.wikipedia.org/wiki/Emergency_position...

    A unique 15-digit hexadecimal beacon identification code (a "15-hex ID"). The encoded identification of the vessel or aircraft in distress, either as an MMSI value, or as, in the case of an ELT, either the aircraft's registration or its ICAO 24-bit address (from its Mode-S transponder). When equipped, a GPS position.

  3. Emergency locator beacon - Wikipedia

    en.wikipedia.org/wiki/Emergency_locator_beacon

    Emergency locator beacon. An emergency locator beacon is a radio beacon, a portable battery powered radio transmitter, used to locate airplanes, vessels, and persons in distress and in need of immediate rescue. Various types of emergency locator beacons are carried by aircraft, ships, vehicles, hikers and cross-country skiers.

  4. Gillham code - Wikipedia

    en.wikipedia.org/wiki/Gillham_Code

    Gillham code is a zero-padded 12-bit binary code using a parallel nine- [1] to eleven-wire interface, [2] the Gillham interface, that is used to transmit uncorrected barometric altitude between an encoding altimeter or analog air data computer and a digital transponder. It is a modified form of a Gray code and is sometimes referred to simply as ...

  5. SELCAL - Wikipedia

    en.wikipedia.org/wiki/SELCAL

    SELCAL. In international aviation, SELCAL or SelCal is a selective-calling radio system that can alert an aircraft's crew that a ground radio station wishes to communicate with the aircraft. SELCAL uses a ground-based encoder and radio transmitter to broadcast an audio signal that is picked up by a decoder and radio receiver on an aircraft. The ...

  6. International Cospas-Sarsat Programme - Wikipedia

    en.wikipedia.org/wiki/International_Cospas...

    The International Cospas-Sarsat Programme is a satellite -aided search and rescue (SAR) initiative. It is organized as a treaty -based, nonprofit, intergovernmental, humanitarian cooperative of 45 nations and agencies (see infobox). [ 2 ] It is dedicated to detecting and locating emergency locator radio beacons activated by persons, aircraft or ...

  7. BCH code - Wikipedia

    en.wikipedia.org/wiki/BCH_code

    The BCH code with and higher has the generator polynomial. This code has minimal Hamming distance 15 and corrects 7 errors. It has 1 data bit and 14 checksum bits. It is also denoted as: (15, 1) BCH code. In fact, this code has only two codewords: 000000000000000 and 111111111111111 (a trivial repetition code).

  8. Hexadecimal - Wikipedia

    en.wikipedia.org/wiki/Hexadecimal

    In mathematics and computing, the hexadecimal (also base-16 or simply hex) numeral system is a positional numeral system that represents numbers using a radix (base) of sixteen. Unlike the decimal system representing numbers using ten symbols, hexadecimal uses sixteen distinct symbols, most often the symbols "0"–"9" to represent values 0 to 9 ...

  9. ImHex - Wikipedia

    en.wikipedia.org/wiki/ImHex

    imhex.werwolv.net. Free software portal. ImHex is a free cross-platform hex editor available on Windows, macOS, and Linux. [1] ImHex is used by programmers and reverse engineers to view and analyze binary data. [2]