heading bug /hed.. b/ noun a
movable plastic marker on the horizon-tal situation indicator

heading correction /hed.. k.
rek.(.)n/ noun a change of heading in order to deal with a new situation. Also called course correction

heading indicator /hed..
.nd.ke.t./ noun an instrument which gives course or direction information
e.g. a horizontal situation indicator (HSI) or direction indicator (DI)
COMMENT: The heading indicator is
driven by a gyro and provides steady,
exact indications of heading.

heading to steer /hed.. t. st../
noun a gyro-compass point in which to direct the aircraft
head-on /hed .n/ adjective, adverb
. to approach head-on to approach from opposite directions
head-on collision /hed .n k. l.(.)n/ noun a collision between two things or vehicles coming from oppo-site directions
headphones /hedf.υnz/ noun
small speakers with padding, worn over a person’s ears, used for private listen-ing . Headphones are used to monitor the signal.
headset /hedset/ noun headphones with a microphone attached, used for RT communications . Headsets are usually used in preference to hand-held microphones.
head-up display noun a cockpit sys-tem where data from flight instruments is projected onto a screen or the wind-screen so that the pilot can see it with-out having to look down. Abbreviation
HUD headwind /hedw.nd/ noun a wind which is blowing in the opposite direc-tion to the direction of movement or
flight. Compare tailwind (NOTE: The word is also written head wind.) headwind component /hedw.nd
k.mp.υn.nt/ noun one of the three possible components of a wind, the other two being crosswind and tailwind
heap /hip/ noun a group of things
piled or thrown one on top of another heap cloud /hip klaυd/ noun same as cumulus cloud
heat /hit/ noun warmth, being hot .
The heat generated by combustion is considerable. . verb to make warm or warmer . The air leaving the turbo-charger is very warm and can be used to heat the cabin.
heater /hit./ noun a device for heat-ing . Pitot heads contain heater ele-ments to prevent icing.
heating /hit../ noun the process of making something warmer . the heat-ing action of the sun . kinetic

heavier-than-air /hevi. θ.n e./
adjective weighing more than the air it
displaces, and so needing power to fly heavy /hevi/ adjective having a lot of weight . a heavy load a load of great weight . heavy rain rain which is dense and distributes a lot of water over the surface of the Earth in a relatively short time
heavy-duty /hevi djuti/ adjective
referring to something designed for

111 hill
hard wear or use . a heavy-duty battery