RNAV Training Manual - Keilir
RNAV Training Manual - Keilir
RNAV Training Manual - Keilir
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How are <strong>RNAV</strong> Procedures different?<br />
1. Definition of Protected Area based on <strong>RNAV</strong> system performance or RNP P A<br />
Based on <strong>RNAV</strong> system type Based on RNP<br />
<strong>RNAV</strong> procedures designated for specific<br />
navigation systems, eg<br />
<strong>RNAV</strong> (GNSS)<br />
ie. FMS GPS only, not<br />
<strong>RNAV</strong> (DME-DME)<br />
panel mount GPS<br />
<strong>RNAV</strong> (EXCEPT CLASS A GNSS)<br />
PANS OPS protected area width is 2x<br />
RNP + a buffer<br />
Buffer is 2nm for arrival, 1nm for initial<br />
and intermediate approach and 0.5nm for<br />
final, missed approach and departure<br />
Full width of Protected Area<br />
Each procedure type has a systemspecific<br />
semi area width , which is the<br />
buffer<br />
4x RNP<br />
buffer<br />
llateral t l protection t ti either ith side id of f the th<br />
nominal track, eg. 3nm for GPS STARs<br />
Buffer<br />
Area<br />
Buffer<br />
Area<br />
Modern approach is to define procedures<br />
based on RNP, RNP not on specific navigation<br />
systems<br />
Fix Tolerance is based on system-<br />
MOC<br />
specific linear Along Track (ATT) and Fix Tolerance is simply a 1x RNP radius<br />
Cross-Track (XTT) tolerances, rather<br />
than angular splays<br />
around the waypoint<br />
See the Eurocontrol publication p Guidance Material for the Design g of Terminal Procedures for Area Navigation g , at http://www.ecacnav.com/downloads/iss3 p _0.pdf p<br />
This is an excellent document, with detailed content on many topics that are only briefly touched upon in this manual. It is well worth downloading and saving as a<br />
reference.<br />
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