ILS

Question 1

What does the Localizer provide?

Answer 1

Lateral course guidance

Localizer is part of the Instrument Landing System (ILS) that helps pilots align with the runway during approach.

Question 2

What does the Glide Slope provide?

Answer 2

Vertical course guidance

Glide Slope is used in conjunction with the Localizer to ensure proper descent angle during landing.

Question 3

What is a notable error associated with the Glide Slope?

Answer 3

False glide slope above normal glide slope

This can lead to incorrect altitude readings and potentially hazardous situations during approach.

Question 4

What is the function of the Approach Light System (ALS)?

Answer 4

Provides basic visible means to transition between instrument-guided flight into a visual approach

ALS enhances visual cues for pilots as they approach the runway.

Question 5

What is the range of the ALS for precision instrument runways?

Answer 5

2,400-3,000 feet

This range allows pilots to visually transition to landing from instrument flight.

Question 6

What is the range of the ALS for non-precision instrument runways?

Answer 6

1,400-1,500 feet

The shorter range reflects the less precise nature of non-precision approaches.

Question 7

What visual aid may be included in the ALS configuration?

Answer 7

Sequenced Flashing Lights

These lights appear to the pilot as a ball of light traveling towards the runway at twice a second, commonly referred to as ‘The Rabbit’.

Question 8

How can the visible parts of the ALS configuration assist pilots?

Answer 8

Help estimate flight visibility

This estimation is crucial for determining if visual conditions are suitable for landing.

Question 9

What are the four components of an IL S?

G
L
A
M

Answer 9

• glideslope
• localizer
• approach lighting system
• marker beacon(s)