Presentation 2008/11/19
Note on the Safety Assessment Method of RNAV Operations
Osamu AMAI,
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Abstract(in Japanese) (See Japanese page)
Abstract(in English) RNAV road map was made by Civil Aviation Bureau for effective utilization of area navigation (RNAV). Following the road map, RNAV routes have been implemented in Japan. Annex 11 to the Convention on International Civil Aviation describes that any significant safety-related changes to the ATC system shall only be effected after a safety assessment has demonstrated that an acceptable level of safety will be met. For implementation of RNAV parallel route, the estimation of the safe minimum route separation of RNAV routes was required. The distribution of cross-track deviations of the aircraft which flew on the RNAV arrival route was estimated. Then a probability distribution model of it was found. The lateral overlay probability was estimated using the empirical distribution and its deformation. Collision risk was estimated by collision risk formula using the estimate of lateral overlap probability together with other given parameters. As a result, in the case that the population of aircraft with poor navigation performance, which barely meets 95% containment requirement, is assumed to be 10 percent, estimates of minimum route separation are 8NM for RNAV1 routes and 32NM for RNAV5 routes, respectively.
Keyword(in Japanese) (See Japanese page)
Keyword(in English) Air Traffic Control / Navigation Accuracy / Area Navigation / Collision Risk / Minimum Route Separation
Paper # SSS2008-18
Date of Issue

Conference Information
Committee SSS
Conference Date 2008/11/19(1days)
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Paper Information
Registration To Safety (SSS)
Language JPN
Title (in Japanese) (See Japanese page)
Sub Title (in Japanese) (See Japanese page)
Title (in English) Note on the Safety Assessment Method of RNAV Operations
Sub Title (in English)
Keyword(1) Air Traffic Control
Keyword(2) Navigation Accuracy
Keyword(3) Area Navigation
Keyword(4) Collision Risk
Keyword(5) Minimum Route Separation
1st Author's Name Osamu AMAI
1st Author's Affiliation Electronic Navigation Research Institute, Independent Administrative Institution()
Date 2008/11/19
Paper # SSS2008-18
Volume (vol) vol.108
Number (no) 319
Page pp.pp.-
#Pages 6
Date of Issue