predetermine /prid.tm.n/ verb
to decide and set or fix beforehand
predetermined /prid.tm.nd/
adjective decided and set beforehand .
When the roll control knob is returned to the central position, the aircraft rolls out on to a predetermined heading.
predict /pr.d.kt/ verb to foretell or to say beforehand . Rain is predicted within the next hour. . Dead reckoning position is the position of the aircraft as predicted by calculation.
predictable /pr.d.kt.b(.)l/ adjec-tive 1. reliably regular and therefore foreseeable . Only the high frequency band has predictable, reliable sky wave propagation by day and by night. 2.
capable of being foreseen, expected or anticipated . the accident was predict-able it was possible to know that the accident would happen before it hap-pened
prediction /pr.d.k..n/ noun the act of saying what will happen in the future
. The map display combines current ground speed and lateral acceleration into a prediction of the path over the ground to be followed over the next 30, 60 and 90 seconds.
predominance /pr.d.m.n.ns/
noun greatest importance or influence .
The predominance of a cold northerly airstream during the winter months.
predominant /pr.d.m.n.nt/ adjec-tive most important or influential, more powerful than others . The ocean sur-face usually consists of a predominant
177 present
swell three or four feet high and 500 to 1,000 feet between crests.
predominate /pr.d.m.ne.t/ verb to
have greater number or importance, or to be more powerful than others . A cold northerly airstream predominates during the winter months.
prefer /pr.f/ verb to like more, to favour . Of the two basic types of fuel pump, where lower pressures are required at the burners, the gear-type pump is preferred because of its light-ness. (NOTE: preferring – preferred)
preferable /pref(.)r.b(.)l/ adjective
better than, more desirable . Three position lines are preferable to two. . If there is a choice between two courses of action, the safest is the most preferable.
preference /pref(.)r.ns/ noun . in
preference to by choice, rather than .
For some applications, e.g. landing gear and flaps, hydraulic systems are used in preference to mechanical or electrical systems.
prefix /prif.ks/ noun part of a word added at the beginning of a word to alter the meaning . Pre- is a prefix meaning ‘before’. (NOTE: The plural form is pre-fixes.)
COMMENT: The prefixes for cloud types are: alto- medium level cloud (6,500 feet to 23,000 feet); cirro- high cloud (16,500 feet and above); nimbo-any height, but rain-bearing as for example nimbostratus: rain carrying, low-level cloud; strato- low cloud (up to 6,500 feet).
pre-flight /pri fla.t/ adjective tak-
ing place before a flight . pre-flight briefing a short instructional talk before a flight . pre-flight checks checks made on the aircraft structure and systems before taking off . During pre-flight checks, control surfaces should be moved by hand to ascertain that they have full and free movement. .
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