PAQB Flashcards
Altitude
Vertical distance of a level, point, or an object considered as a point measured from a pressure elevation level
Height
Vertical distance of a level, a point, or an object considered as a point measured from a specified datum.
Elevation
vertical distance of a level or a point on or affixed to the surface of the earth measured from mean sea level
Flight Level
Surface of a constant atmospheric pressure measured from a standard pressure datum of 1013.2 HPa or 29.92 inches of Hg.
Transition Level
The lowest flight level available for use above the transition altitude. It varies with the QNH value of the aerodrome of area concerned.
Transition Layer
The airspace between transition altitude and the transition layer.
Minimum Descent Altitude (MDA)
The lowest altitude to which descent is authorized during non precision approach if visual contact is not established where no electronic glideslope is provided. The minimum descent altitude is indicated by pressure altimeter when set to QNH.
Decision Altitude
the specified altitude (height) in the precision approach and precision like approach [RNAV (GPS)] at which a go around must be initiated if the required visual reference to continue the approach has not been established.
Transition Altitude
the altitude in the vicinity of aerodrome(s) at or below w/c the vertical position of an aircraft is express in altitude that is determined from an altimeter set to sea level pressure (QNH).
DA
is referenced to mean sea level.
Decision Height
is referenced to threshold or touchdown zone elevation
Waypoint
is a predetermined geographical position defined in terms of latitude/longitude coordinates; may be a simple name point in space or associated with existing navigational aids, intersection or fixes.
Area Navigation System (RNAV)
area navigation, is a method of navigation that permits aircraft operation on any desired flight path within the coverage of station-referenced navigational aids (VOR, NDB) or within the capability of the aircraft’s self-contained aids (IRS, ADIRS, GPS) or combination of both.
QNH
is the pressure value at sea level, if this value is set on the subscale, the altimeter will indicate the airfield elevation after landing.
QFE
is the pressure value at aerodrome level, if the value is set on the subscale, the altimeter will zero after landing.
QNE
(1013.2 Hpa/29.92 inHg) is the pressure value of standard atmosphere, is set on the subscale to indicate flight level above the transition level, to establish vertical separation of enroute traffic.
CAVOK
ceiling, no weather and visibility ok, no clouds below 4,500’, no precipitation or thunderstorm and visibility 10km or more
Temperature Inversion
a meteorological phenomenon where in the temperature increases as altitude increases; it deviates from the standard rule that the temperature decreases as the altitude increases.
Standard Lapse Rate
temperature decreases 2 degrees centigrade per 1,000’
Visibility
the maximum distance towards the horizon at which the meteorological observer can identify a prominent object or visual signal.
Ceiling
the height of lowest observed opaque layer of obscuring phenomena aloft covering 4/8 or more of the sky and taken above the official aerodrome.
