RNAV Flashcards
What does RNAV stand for?
Area Navigation
What is RNAV?
A method of navigation which permits a/c operation on any desired flight plan with the coverage of station-referenced navigation aids or within limits of capability of self contained navigation aids/combination of both.
What does PBN stand for
Performances Based Navigation
How does RNAV work?
Instead of overflying Ground nav aids the A/C FMS will fly to a series of preloaded waypoints and position itself on a computer track between and individual waypoints.
How does the FMS remain within the accuracy of the WGS84 system?
Utilises LNAV and VNAV
What is Basic Area Navigation B-RNAV?
A forerunner of the RNAV programme. Enables capacity gains through modification to en-route structure
Are all IFR a/C B-RNAV compliant?
They must be
What track keeping accuracy does B-RNAV require?
+/-5nm for at least 95% if flight time.
Is B-RNAV used in TMAs?
No not intended for TMA use.
R-NAV is becoming the standard in ECAC airspace. True or False?
True.
R-NAV permits A/C operation on any desired flight path within the coverage of Navigation aids (True or False)
True.
What are the benefits of R-NAV?
Reduces RTF by 30% $30 million annual saving Decreased taxi time Decreases departure delays Improved flight profiles Reduces distances
What are RNPs?
Equipment must be sufficiently capable
And accurate as denoted by the regulatory body.
RNPs are part of a broader concept called PBN. True or False?
True
RNP enables implementation of new routes and flight paths
True or False?
True
RNP was previously based on INS (inertial navigation) now based on GNSS (GPS)
True or False?
True
What are the 5 types of RNP accuracy?
1/4/10/12.6/ 20
Represents accuracies of
+/- 1/4/10/12.6/20 nm
Are the RNP accuracies sufficient for approaches?
No just en-route
ATC should be made aware when it is impossible for an aircraft to maintain its RNP accuracy appropriate to the RNP airspace being used.
True
What will ATC do when they find out an A/C can now longer comply with RNP accuracies for the route?
Provide increased seperation
Coordinate with other ATC units as appropriate
Fixed RNP Routes are published ATS Route which can be Flight planned for use by A/C approved for a specific RNP type.
True or False?
True
Where do Fixed RNP Routes begin and end?
What are established along the way of RNP Routes?
Notified reporting points
Waypoints
What are contingency RNP Routes?
Routes that can be made available to A/C approved for a specific RNP type during limited time periods (hours/days/seasons)
RNP Routes can also be established to meet unusual/temporary requirements arising at short notice.
True or False
True.
What are RNP areas?
An area or volume of airspace or airspace of defined dimensions
What does RNP stand for?
Required Navigation Performance
Unpublished tracks(Random Tracks) May be Flight planned with designated and published RNP areas.
True
What does P-RNAV stand for?
Precision RNAV
What is P-RNAV?
Allows en-route and or TMA operations (standardised EU wide) ensuring consistent levels of flight safety.
A/C equipped with P-RNAV must be how accurate to track?
+/- 1nm
Is P-RNAV worldwide or just inEurope?
Europe only
Does RNP-RNAV require airborne monitoring?
No, no requirement
How is greater accuracy assured with RNP-RNAV?
It is ensured operationally.
How accurate are approaches with RNP-RNV?
+/-0.3nm
Can RNP-RNAV be used in terminal areas?
Yes
RNP-APCH requires what accuracy in the initial/intermediate and missed segments?
+/-0.1nm
What accuracy does RNP-APCH require in the final segment?
+/-0.3nm
The RNP instrument approach procedures with authorisation required (AR) or RNP AR built upon PBN. True or False?
True.
RNP AR APCH is defined as an RNP approach procedure that requires a lateral TSE lower than the standard RNP values on sun segment of the approach procedure, down to 0.1nm and similar to ILS cat 2/3
True
List the 3 components PBN is comprised of
1) Navigation Application
2) Navigation Specifications
3) Navigation Infrastructure
A navigation application is defined as
The implementation of a navigation specification and its supporting navigation infrastructure, applied to routes, procedures and or defined airspace volume
4D; a move gate to gate will require accurate timing possibly as strict as
2-5 seconds
4D can only happen if
The aircraft is fitted with a 4D FMS and data link capabilities(and the ATCO) has the tools available.
