[Ref AC 120-62 (FAA), ISBN: 978-0-470-74077-4, CASA (Australia)] What’s Balanced Field Length (BFL)? Balanced field length is a field length where the distance to accelerate and stop is equal to the take-off distance of an aeroplane experiencing an engine failure at the critical engine failure recognition speed (V1). (definition of CASA, in Australia) Balanced Field Length refers […]
Category: Definition / Terminology / Jargon
“B747, HEAVY”, what’s heavy?
[Ref AirServices (Australia)] Heavy (n.) a plane with a take-off weight of more than 136,000 kg (>136 tones) Read More – What’s “Large Aircraft” (LACFT)
MSA – Minimum Sector Altitude (Minimum Safe Altitude)
[Ref Jeppesen, Skybrary 1, Skybrary 2] (Last Update: 2020 Sept 2 1520Z) In ICAO definition, MSA (Minimum Sector Altitude) is the lowest altitude which may be used which will provide a minimum clearance of 1000ft (300m) above all objects located in an area contained within a sector of a circle of 25NM (46km) radius centered […]
MOCA – Minimum Obstruction Clearance Altitude
[Ref Jeppesen] What’s Minimum Obstruction Clearance Altitude (MOCA)? The lowest published altitude in effect between radio fixes on VOR airways, off airway routes, or route segments which meets obstacle clearance requirements for the entire route segment. In the USA assures acceptable navigational signal coverage only within 22NM of a VOR. Read More – # […]
MEA – Minimum En-route IFR Altitude
[Ref Jeppesen] What’s MEA? MEA is the lowest published altitude between radio fixes that meets obstacle clearance requirements between those fixes and in many countries assures acceptable navigational signal coverage. The MEA applies to the entire width of the airway, segment, or route between the radio fixes defining the airway, segment, or route. Notes: MEA refers […]
required visual reference
[Ref Jeppesen] What’s the significance of “required visual reference”? The required visual reference means: the section of the visual aids or of the approach area which should have been in view for sufficient time for the pilot to have made an assessment of the aircraft position and rate of change of position, in relation to […]
MDA / MDH (Minimum Descent Altitude / Height)
[Ref Jeppesen] What’s MDA/MDH – Minimum Descent Altitude/Minimum Descent Height? A specified altitude or height in a non-precision approach or circling approach below which descent must not be made without the required visual reference. Minimum descent altitude (MDA) is referenced to mean sea level (MSL) ; Minimum descent height (MDH) is referenced to the aerodrome elevation […]
Movement Area = Maneuvering Area + Apron
[Ref Jeppesen] Movement Area = Maneuvering Area + Apron Movement Area is the part of an aerodrome consisting of the manoeuvring area and the apron(s). What’s Maneuvering Area? The part of an aerodrome to be used for the take-off, landing and taxiing of aircraft, excluding aprons. What’s Apron? APRON — A defined area, […]
Location Indicator (ICAO) v.s Location Identifier (IATA)
[Ref Jeppesen] Location Indicator — is the term used by ICAO – a four-letter code ; Location Identifier — is the term used by IATA – a three-letter code Example: Hong Kong International Airport ICAO location indicator – four-letter code : VHHH IATA location identifier – three-letter code : HKG
HST – High Speed Turnoff
[Ref Jeppesen] HST is Hight Speed Taxiway / Turnoff — A long radius taxiway designed and provided with lighting or marking to define the path of an aircraft, traveling at high speed (up to 60KT), from the runway center to a point on the center of a taxiway. Also referred to as long radius exit […]