Chapter 9 - Airfield Layout Flashcards
What are the two categories of signs on an airfield?
Mandatory signs
Information signs
What colour are mandatory signs?
Red (with white text)
Give three examples of mandatory signs.
Runway holding position signs
No entry signs
Intermediate Taxi-Holding Position signs
What colour are information signs?
Yellow (black text)
Give two examples of information signs.
Location signs - Identify taxiways (single letter) or runways (first two numbers of mag heading - to the nearest 10)
Direction and Destination signs
What is AGL?
Aeronautical Ground Lighting
What are the two types of airfield beacon?
Identification beacon
Location beacon
What colour are identification beacons?
Red = Military airfield
Green = Civilian airfield
On a military airfield the identification beacon flashes a two letter identification code in red. Provided where a number of airfields in the same area operate at night (e.g. Cranwell and Barkston) so identity isn’t confused.
What do red lights across both ends of the runway indicate?
The runway is not in use, you are approaching the wrong runway.
When are identification beacons provided?
Where multiple airfields operate near one another and identity could be mistaken.
When are location beacons provided?
When an airfield is situated well away from other airfields and no confusion of identity could arise.
What colour does an airfield location beacon flash if the airfield is well away from areas of high background lighting?
White
What colour does an airfield location beacon flash if the airfield is in an area with a high level of background lighting?
A green light flashing alternately with a white light
How far from the runway threshold does a simple approach lighting system commence?
500m
How far from the runway threshold does the 5-bar NATO standard system of approach lighting commence?
900m
What colour is runway approach lighting?
White
When is supplementary approach lighting used?
At airfields where Cat II and III precision approaches are conducted.
What does supplementary approach lighting consist of?
White centreline barrettes and two rows of red side barrettes. Installed to provide the pilot with enhanced visual cues over the last 300m of the approach.
What is PAPI?
Precision Approach Path Indicator
What does two reds and two whites on PAPI indicate?
On correct approach
What does four whites on PAPI indicate?
Too high
What does three whites and one red on PAPI indicate?
Slightly too high
What does four reds on PAPI indicate?
Too low
What does three reds and one white on PAPI indicate?
Slightly low