Instrument Landing System

Question 1

What is the function of Instrument Landing System (ILS)?

Answer 1

• ILS provides navigational aid when pilots are unable to establish visual contact with the ground.
• ILS provides the pilot with audio and visual identification to indicate range from the touchdown threshold point.

Question 2

What is the function of localiser?

Answer 2

• The localiser provides audio and visual guidance for lateral steering, with indication via the vertical deviation arrow.
• To provide lateral guidance.

Question 3

What is the function of glide scope?

Answer 3

• The glidescope provides audio and visual guidance for vertical steering on the descent path, with indicated via horizontal deviation arrow.
• Receive signal above the glide path.

Question 4

What is the function of the marker beacon?

Answer 4

• The marker beacon provides audio and visual indication of the approximate range to runway touchdown point.