Separation Standards Definitions Flashcards
Oceanic entry point
The first reporting point over which an aircraft passes, or is expected to pass immediately before or upon initial entry into oceanic controlled airspace, normally the reference point for applying oceanic separation
Common point
A single fix, whether a named point, navaid, a fix derived from a navaid, or geographical coordinates expressed in degrees of latitude and longitude over which 2 or more aircraft will pass or have passed before proceeding on the same, reciprocal or diverging tracks
Oceanic exit point
The last reporting point over which an aircraft passes or is expected to pass immediately on or immediately after leaving oceanic controlled airspace
Lateral separation
The specified spacing between aircraft expressed in terms of distance or angular displacement between tracks
Longitudinal separation
The specified interval between aircraft expressed in units of time or distance along track
Mach number technique
The term used to describe the technique of clearing turbojet aircraft operating along the same identical track or continuously diverging tracks to maintain specified Mach numbers in order to maintain adequate longitudinal separation between successive aircraft at, or climbing or descending to the same level
Opposite direction aircraft
Aircraft operating on tracks whose angular differences are from 90 degrees up to and including 180 degrees
Passing point
The point where aircraft are at the minimum distance from each other and from which longitudinal separation is calculated. This May or may not coincide with the common point
Passing time
The time where aircraft are at the minimum distance from each other and from which longitudinal separation is calculated. May or may not coincide with the common point
Same identical track
Aircraft paths whose projections on the earths surface are exactly the same
Same direction aircraft
Aircraft operating on tracks whose angular differences are from 0 degrees up to but not including 90 degrees
Significant point
A navaid, a fix derived from a navaid, a named point or geographical coordinates expressed in degrees of latitude and longitude or both, established for the purpose of providing separation, as a reporting point or to delineate a route of flight
Step climb
A technique in which higher altitudes or flight levels are planned or achieved at a specified point or time
Vertical separation
Specified spacing of aircraft expressed in altitudes or flight levels
Named point
A reporting point identified by a name as well as by latitude and longitude
Cruise climb
An aircraft cruising technique resulting in a net increase in altitude as the aircraft mass decreases
Cruising level
A level maintained during a significant portion of a flight
Deemed separation
The approved use of less than standard separation
Other means
Position information derived from advanced ATC automation systems that take into account multiple sources of information namely voice reports, ADS and/or CPDLC reports, estimates and weather information, may be the basis for applying separation standards
Track
The great circle projection on the earths surface of the path of an aircraft, the direction of which path at any point is usually expressed in degrees from north (true, magnetic or grid)
Diverging tracks
Tracks downstream of the common point whose angular divergence is equal to or less than 90 180 degrees
Steep tracks
Parallel tracks which are not laterally separated because the tracks exceed the allowed change in latitude for any ten degree interval of longitude
Intruder
A flight, whose profile, if cleared, would enter the protected airspace of a fully cleared flight
Backtracking
Aircraft track whose routeing contains more than one consecutive common point (eg significant point, waypoint, navigation aid or fix) that is contained within a single opposite direction organised track
