17 analogue
is often used to describe the colour of the yellow light in traffic signals.)
ambient /mbi.nt/ adjective refer-
ring to the surrounding atmospheric conditions . Fresh ambient air is routed into the cabin. . ambient temperature
the temperature outside the aircraft

ambient pressure /mbi.nt
pre../ noun the pressure outside the aircraft
ambiguity /mb.ju.ti/ noun
something heard or seen which can be understood in more than one way, thus resulting in possible confusion . to avoid ambiguity to avoid misunder-standing or confusion . Correct use of R/T phraseology avoids ambiguity.
ambiguous /mb.ju.s/ adjective
able to be understood in more than one way . It is important that R/T transmis-sions are not ambiguous.
AMD abbreviation amendment amend /.mend/ verb to change, update, improve or correct something .
he amended the entry in his log book
he corrected or changed the entry in his log book
amendment /.mendm.nt/ noun a
change, updating, improvement or cor-rection made, e.g., to a document or procedure . When a terminal aero-drome forecast requires amendment, the amended forecast is indicated by inserting AMD after TAF.
ammeter /mit./ noun an instru-ment for measuring amperes in order to give the strength of an electric current .
The centre-zero ammeter tells the pilot the status of the aircraft battery.
amp /mp/ abbreviation ampere amperage /mp.r.d/ noun the
strength of an electric current expressed in amperes . Measuring the amperage of a motor can give a rough estimate of the load on the motor.
ampere /mpe./ noun a unit of elec-tric current equal to one volt flowing through an impedance of one ohm . a 13-amp fuse . Current flow is measured in amperes. Abbreviation amp . ampere hours number of amperes per hour . Battery capacity is rated in ampere hours.
ample /mp.l/ adjective plenty of .
During the course you will have ample opportunity to demonstrate your skill. .
ample time plenty of time
amplification /mpl.f.ke..(.)n/
noun the act of increasing the strength of an electrical signal . Amplification of the signal increases the volume.
amplifier /mpl.fa../ noun an elec-tronic device for increasing the strength of an electrical signal . If the power supply from the amplifier to the gauge fails, the needle slowly falls to zero.
amplify /mpl.fa./ verb to increase the strength of an electrical signal . An electric current is amplified and then transmitted. (NOTE: amplifies – ampli-fying – amplified)
amplitude /mpl.tjud/ noun the
maximum variation of a vibration or oscillation from the position of equilib-rium . to calculate fuel required, multi-ply the duration of the flight by the con-sumption of the engine at the required power
AMS abbreviation aeronautical mobile
service AMSL abbreviation above mean sea level
AMSS abbreviation automatic mes-sage switching system