Nav Flashcards
What are the types of Precision Approach Available?
ILS
MLS
RNP APCH (for the ICAO exam)
PAR
What are the types of non-precision approaches available?
VOR
NDB
LOC/DME
GNSS
SRA
VDF
Define a precision approach
An instrument approach and landing using lateral and vertical guidance with minima as determined by the category of operation
Define a non-precision approach
An instrument approach and landing which utilises lateral guidance but does not use vertical guidance
By what level must approaches be stabilised?
1000ft above aerodrome elevation in IMC and 500ft in VMC
When is an approach considered stabilised?
When;
The a/c is on the correct flight path
Only small changes in heading/pitch are necessary to maintain the correct flight path
The airspeed is not more than Landing Reference Speed (VREF) + 20kts IAS and not less than VREF
Sink rate no greater than 1000ft/min (special briefing should be conducted if greater than this is required)
Power setting is appropriate for the a/c configuration and is not below the minimum power for the approach as defined by the operator
All briefings and checklists completed
What are the ATCO’s actions which may contribute to an unstable approach?
Late or high rate of descent to intercept ILS
Late change in runway resulting in a tailwind landing
Inappropriate vectoring not allowing the correct profile to be flown
Inappropriate use of speed control
Incorrect distance from touchdown
Vectoring for short final
GS interception from above
Delayed descent
What are the segements of an Instrument Approach?
- Arrival
- Initial
- Intermediate
- Final
- Missed
Describe the Arrival segment of a instrument approach
From the en-route phase to the approach phase, ends at the IAF
Describe the Initial segment of an Instrument Approach
Begins at IAF and ends at the IF takes a/c to the intermediate segment
Describe the Intermediate segment of an Instrument Approach
From IF to the FAF/FAP
Speed and configuration adjusted to prepare for final approach
Obstacle clearance reduces from 1000ft to 500ft
Describe the Final Segment of the Instrument Approach
From FAP/FAF to the MAPt
Alignment and descent for landing are made. May be to a runway for a straight in landing or to an aerodrome for a visual manoeuvre
Describe the Missed segment of the Instrument Approach
Takes pilot from the MAPt up above obstacles (150ft above) and back to another attempt at the approach.
What may a MAPt be?
Glide Path DA/DH
Nav facility
Fix
Specified distance from FAF
What is a DA or DH?
Decision Altitude/Height
Apply only to precision approaches