commence /k.mens/ verb to start to do something . commence the evacua-tion start getting people out of the air-craft
commercial /k.m.(.)l/ adjective
referring to a business activity . com-mercial aviation flying as a business enterprise
commercial aircraft /k.m.(.)l e.krɑft/ noun aircraft used to carry cargo or passengers for payment
Commercial Pilot’s Licence /k. m.(.)l pa.l.ts la.s(.)ns/ noun the licence that a person requires to be pilot-in-command of public transport aircraft certified for single-pilot opera-tions. Abbreviation CPL
common sense /k.m.n sens/
noun ordinary good sense . You should use your common sense as well as fol-low the rules if a passenger feels unwell.
comms /k.mz/ abbreviation commu-nications
49 compensate
communicate /k.mjun.ke.t/ verb
to make contact with somebody in order to pass information . The cabin attend-ants should communicate with the cap-tain.
communication /k.mjun.
ke..(.)n/ noun the act of passing infor-mation to somebody usually, but not always, by using language . Two meth-ods of communication are available to crew members – language and hand signals.
communication link /k.mjun. ke..(.)n l..k/ noun a telephone or radio connection, as between the ground crew and flight deck while an aircraft is preparing for departure
communications /k.mjun.
ke..(.)nz/ plural noun a system of passing information . satellite commu-nications . VHF communications are allocated the frequency bracket 118– 137 MHz. Abbreviation comms
commutator /k.mjute.t./ noun a
device containing metal bars connected to the coils of a generator to produce electrical current . As the power output required is DC not AC, a commutator is fixed at one end of the armature.
compact /k.mpkt/ adjective
small, close together, or not taking much space . The annular system, as used on modern aircraft, provides a compact system, and, for the same out-put and mass flow, a shorter system. .
verb 1. to make smaller or more dense by pressing 2. to compress, by driving over with heavy machinery . When tax-iing on grass, aircraft wheels compact the earth as the aircraft moves over it.
compaction /k.mpk.(.)n/ noun
the act of pressing things together to form one, or of compressing something to make it hard . The speed of impact when the aircraft passes through a snowstorm causes compaction of snow-flakes into a solid mass on leading edges and air-intakes.
comparable /k.mp(.)r.b(.)l/ adjective possible to compare equally with something else . Titanium is non-magnetic and has an electrical resist-ance comparable to that of stainless steel.
comparator /k.mpr.t./ noun a
device to compare two things . The autopilot comparator monitors the operation of the elevator and aileron channels.
compare /k.mpe./ verb to find the similarities and dissimilarities between two or more things . When the chart is properly orientated, it is easier to com-pare the distance between landmarks on the ground with their corresponding distances on the chart. . An aneroid barometer is small compared with a mercury barometer. (NOTE: Compare with is regarded by some as better usage than compare to.)
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