连续下降最终进近 Continuous Descent Final Approach (CDFA)(3)

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1 Approaches Database
1. with a glide path (GP) angle displayed on the final approach segment of the LEGS page
– Complies with final approach step down altitudes F-PLN page (MD-10/11, 717)

Two Types of Approaches in the Navigation
2 Approaches Database
2. where no GP angle is published and where the approach end of the runway is defined by a runway waypoint (RWxx) or a missed approach point fix (MXxx or a named – Normally a 50-ft threshold crossing altitude is used waypoint) exists
RW MX d
Mi d h i t
RWxx, MXxx or named
waypoint
Missed approach point
FAF
Runway threshold

GP Published
● Approach diagram shows glide path angle and VNAV
compatibility

GP Not Published

Types of Approaches That Are Not
VNAV PTH-Compatible
● Approaches that do not have a GP angle, and
● There is no or appropriate
RWxx MXxx waypoint with an path terminating at approximately 50ft above the runway threshold, or
● The missed approach point is beyond the runway threshold
● Circling-only approaches (e.g., “VOR-A”)

No RWxx, MXxx or
d it
Missed approach point
beyond the runway
named waypoint
FAF
Runway Threshold No GP angle

Total number of Non-ILS procedures,
%VNAV
flyable in Area Non-ILS VNAV No VNAV Percentages Circle
Africa 606 561 45 92.6 3
Canada & Alaska 1427 1100 327 77.1 215
East Europe 576 573 3 99.5 2
Europe 1306 1233 73 94.4 42
Latin America 465 393 72 84.5 28
Asia 1248 978 270 78.4 198
Middle East 634 555 79 87.5 13
Pacific 637 508 29 79.7 86
South America 844 570 274 67.5 23
South Pacific 1259 845 414 67.1 217
USA 8230 7016 1214 85.2 1042

Procedures included are all procedure types other than full ILS (Localizer/Glide Slope); including procedures
that have circle-to-land only minimums. John Kasten, Jeppessen, effective Jan 2008
VNAV and GP angle Capability
● 737-3/4/500 FMC U7.1 or later
● 737-6/7/8/900/BBJ All
● 747-400 FANS with FMC Load 15
757/767 P
● Pegasus
● 777 All
● 787 All
● MD-10/11 All
● MD-90(Pegasus) / 717 All

Use of MDA(H)s as DA(H)s
● When VNAV PTH is used, a slight momentary descent below the published DA(H) during the missed approach is acceptable
● RNP 0.3 capability or less is required
● Without a published DA(H), the MDA(H) may be used as a DA(H)
FAA HBAT (Handbook Bulletin Air Transport) 99-08 Permits
p ( ), ( ) y

Continuous Descent Final Approach
The - Improvements
Future Technology ● RNAV - Concept
● RNAV (GPS)
● RNAV (RNP)
● IAN
● GLS
● SAAAR / AR

The Future – RNAV Concept
● RNAV (area navigation) capability emerged with introduction
　
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