Sole Means of Navigation
A sole means navigation system for a given phase of flight must allow the aircraft to meet, for that phase of flight, all four navigation system performance requirements: accuracy, integrity, availability and continuity of service.
Solutions for Human Automation Partnerships in European ATM
See Human Integration in Future ATM Systems
The 3-year SHAPE Project, which is concerned with the integration of humans and computerised support (automation) in future ATM will feed into HIFA tools but will mainly result in design guidance for the best synergy between humans and automation.
South American Region See ICAO Region.
Spare Value A Spare value is a value for which no meaning is currently defined. These values are available by the administering authority for local use, and may be assigned in the future.
Spatial Ability The capacity to visualise two or three dimensional figures when their orientation is changed.
Special Category 1 Approach A specially authorised DGNSS Instrument Approach using a DGNSS Instrument Approach System satisfying a specific RNP that allows Operations to MLS/ILS Category 1 minima with differential GNSS used to provide navigation guidance.
Special Plots The special Civil Mode A codes transmitted by a transponder of an aircraft that is either in a state of Hijack, Radio Failure or Emergency.
Special Use Airspace Penetration (MTCD) An aircraft is involved in a special use airspace penetration if any probable position of the aircraft at a certain moment in time is within an airspace that is declared restricted at that same moment in time
Special Use Airspace Penetration Data (MTCD) It consists of: system trajectory identification; special use airspace identification; time of first loss of separation between aircraft probable positions and special use airspace, plus worst probable position of aircraft at this time, plus nominal position of aircraft at this time; time of minimum distance between nominal route of aircraft plus nominal position of aircraft at this time.
Specialist Objectives Objectives of the EATCHIP Work Programme which were defined in respect to the executive tasks needed to achieve the ECAC Strategy objectives. They related to the overall work to be performed including the preparatory developments as assessments, Standards, guidance material, etc., covered by the EATCHIP Work Programme, as well as implementation work (covered by the CIP).
Specification Detailed description of work done or to be done by a person or group of persons for a project to be carried out; the act of specifying a detailed item.
Speed Conformance An aspect of flight conformance that expresses how well a flight is adhering to its system trajectory from the ground speed perspective. Quantified by comparing the observed ground speed with that predicted in order to identify whether the speed deviation threshold has been exceeded and therefore whether a speed deviation non-conformancy exists.
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