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Many of the steps in the pre-landing checklist are double-checks to eliminate the possibility of unexpected failure of the aircraft. Other steps convert the aircraft from a configuration that is optimised for economical flight to one that is safe for landing.
A launch status check, also known as a "go/no go poll" and several other terms, occurs at the beginning of an American spaceflight mission in which flight controllers monitoring various systems are queried for operation and readiness status before a launch can proceed.
The sortable table below contains the three sets of ISO 3166-1 country codes for each of its 249 countries, links to the ISO 3166-2 country subdivision codes, and the Internet country code top-level domains (ccTLD) which are based on the ISO 3166-1 alpha-2 standard with the few exceptions noted.
CIGAR or CIGARS is a mnemonic that refers to a pre-takeoff checklist performed by general aviation pilots. The mnemonic stands for: [1] Controls; Instruments; Gas; Airplane secure; Run-up. Alternately: [2] Controls; Instruments; Gas; Attitude; Run-up; Yet another version was used by the U.S. Air Force: [3] CIGarettes For The Poor Russian ...
Prediction by partial matching (PPM) is an adaptive statistical data compression technique based on context modeling and prediction. PPM models use a set of previous symbols in the uncompressed symbol stream to predict the next symbol in the stream. PPM algorithms can also be used to cluster data into predicted groupings in cluster analysis.
Pulse-position modulation (PPM) is a form of signal modulation in which M message bits are encoded by transmitting a single pulse in one of possible required time shifts. [ 1 ] [ 2 ] This is repeated every T seconds, such that the transmitted bit rate is M / T {\displaystyle M/T} bits per second.
A map of Europe, with ISO 3166-1 alpha-2 codes in place of the full names of countries and other territories. 'Exceptional reservations' codes CQ, EU and UK are not shown.
Airline codes IATA ICAO Airline Call sign Country/Region Comments PR BOI 2GO: ABAIR Philippines EVY 34 Squadron, Royal Australian Air Force: Multiple