Reduced Vertical Separation Minima Approval The approval that is issued by the appropriate authority of the State in which the Operator is based or of the State in which the aircraft is registered. To obtain such RVSM approval, Operators shall satisfy the said State : a) That aircraft for which the RVSM Approval is sought have the vertical navigation performance capability required for RVSM operations through compliance with the criteria of the RVSM Minimum Aircraft Systems Performance Specification; b) That they have instituted procedures in respect of continued airworthiness (maintenance and repair) practices and programmes; c) that they have instituted flight crew procedures for operations in the EUR RVSM airspace. Reference Material This is material not specifically developed for training purposes and may include ICAO Annexes, ICAO Documents, operational procedures, manuals, etc. Reference VOR/DME Facility The VOR/DME (VORTAC) (TACAN) facility with its designated latitude/longitude position used for the identification and establishment of an RNAV route or flight procedures. Reflection A multi-path return of the signal from a radar, resulting in the production of a false target. Reflections Unwanted signals (PSR or SSR) in the uplink and/or downlink paths resulting in erroneous replies entering the data processing system. Typical reflectors are ground obstructions such as aircraft hangars, buildings, towers and adjacent hills or mountains. Refresher Training The process of further training in work currently performed in order to improve job performance. Also, further training given in skills previously acquired but in which the individual may not currently be up to standard. Region (SNET) A defined volume of airspace with specific properties associated with it for use by Safety Nets. Region Type A means of identifying groups of regions so that parameters may be defined for groups, rather than individual regions. Regression Equation An algebraic equation used to predict criterion performance from predictor scores (SIOP, 1987). Regulation The adoption, enactment and implementation of rules for the achievement of stated objectives by those to whom the regulatory process applies. Reinforcing loop Loop that occurs when an action causes change that accelerates that action, reinforcing the effect of the original action. Associated with positive feedback. Relative Accuracy Relative accuracy is characterised by the variance of a point (P1) relative to another point (P2). In several applied relative surveying techniques. The variance depends on the distance between two points. The variance typically increases with distance. Relative Co-ordinates Relative co-ordinates of a point are determined by measurements relative to another, already coexisting, point. Usually only co-ordinate differences between the known point and the new point are measured or derived indirectly from other measurements.

 
Relaying
The process of transferring packets across sub networks including any necessary packet