Part 1, Section 1 - DEFINITIONS, ABBREAVIATIONS and ACRONYMS Flashcards
Decision altitude (DA) or decision height (DH).
Note 1.— Decision altitude (DA) is referenced to mean sea level and decision height (DH) is referenced to the threshold elevation.
Final approach and take-off area (FATO).
A defined area over which the final phase of the approach manoeuvre to hover or landing is completed and from which the take-off manoeuvre is commenced. Where the FATO is to be used by performance Class 1 helicopters, the defined area includes the rejected take-off area available.
Minimum en-route altitude (MEA).
The altitude for an en-route segment that provides adequate reception of relevant navigation facilities and ATS communications, complies with the airspace structure and provides the required obstacle clearance.
Minimum obstacle clearance altitude (MOCA).
The minimum altitude for a defined segment that provides the required obstacle clearance.
Minimum sector altitude (MSA).
The lowest altitude which may be used which will provide a minimum clearance of 300 m (1 000 ft) above all objects located in an area contained within a sector of a circle of 46 km (25 NM) radius centred on a significant point, the aerodrome reference point (ARP) or the heliport reference point (HRP).
Transition altitude
The altitude at or below which the vertical position of an aircraft is controlled by reference to altitudes.
Transition layer
The airspace between the transition altitude and the transition level.
Transition level.
The lowest flight level available for use above the transition altitude
Fly-by waypoint
A waypoint which requires turn anticipation to allow tangential interception of the next segment of a route or procedure
Flyover waypoint
A waypoint at which a turn is initiated in order to join the next segment of a route or procedure.
