visibility-by-day values
/v.z.b.l.ti ba. de. vljuz/ noun
values which indicate how easily seen an object is in a horizontal line from an observer in daylight conditions
visible /v.z.b(.)l/ adjective that can be seen . When the undercarriage is selected down it may be visible from the crew compartment, but it is not usually possible to tell if it is securely locked. . If the sun is seen through cumulus cloud it will be clearly visible.
vision /v.(.)n/ noun 1. the power of seeing, the ability to see . Lightning at night may cause temporary loss of vision. 2. what you are able to see . In low wing aircraft, downward vision may be limited by the airframe.
visual /v.υ.l/ adjective referring to seeing . The instrument landing system is to provide guidance in the horizontal and vertical planes to an aircraft on final approach into a position from which a safe visual landing can be made.

visual approach slope indicator
/v.υ.l .pr.υt. sl.υp .nd.ke.t./
noun an arrangement of red and white lights on each side of the runway touch-down point to give the pilot information about the plane’s height on final approach. Abbreviation VASI
visual control room /v.υ.l k.n tr.υl rum/ the control room in the tower at an airport. Abbreviation VCR
visual examination /v.υ.l . zm.ne..(.)n/ noun a close observa-tion or inspection with the eyes. Also called visual inspection
visual flight rules /v.υ.l fla.t rulz/ plural noun rules set down by an authority for flight in visual conditions, regarding such things as flight visibility and distance from cloud. Abbreviation VFR. . special VFR flight
COMMENT: Particular requirements for VFR depend on the type of airspace, time of day, and height above terrain.

visual indication /v.υ.l .nd.
ke..(.)n/ noun something which is seen and which suggests a more serious cause, e.g. a warning lamp . Distorted wing panels are often a visual indica-tion of structural damage to the air-frame.
visual meteorological condi-tions /v.υ.l miti.r.l.d.k(.)l k.nd..(.)nz/, visual meteorological conditions criteria /p. e. t.ɑt/
plural noun all the factors which define the limits of flying in visual meteoro-logical conditions. Abbreviation VMC
visual warning /v.υ.l w.n../
noun a warning that can be seen as opposed to a audible warning that can be heard
vital /va.t(.)l/ adjective extremely important . Verbal commands from the crew are vital at all times but particu-larly so if smoke restricts cabin visibil-ity. . Accurate measurements of atmos-pheric pressure and the rate of change of pressure are of vital interest to the meteorological forecaster.
viz /v.z/ adverb namely, in other words, that is to say . There are two types of inverter, viz rotary and static.

VMC 248
VMC abbreviation visual meteorologi-cal conditions
Vne abbreviation never-exceed speed volatile /v.l.ta.l/ adjective describes a liquid which easily changes into a gas or vapour . To aid starting in cold weather, more volatile fuels can be used