07 Microwave Landing System (MLS)

Question 1

What is the principle of operation of an MLS system?

Answer 1

Time Division Multiplexing

Question 2

What happens to an MLS if the associated precision DME is not operating?

Answer 2

• It functions in the same manner as an ILS

- Only straight approaches are now possible

Question 3

What is the azimuth coverage of an MLS?

Answer 3

• +- 40 degrees from the centre line

- Out to a distance of 20nm

Question 4

What are key ground components of an MLS?

Answer 4

• Azimuth transmitter
• Elevation transmitter
• Precision DME (P-DME)

Question 5

For an MLS, how many channels are available and what frequency intervals are they at?

Answer 5

• 200 channels

- 300kHz intervals