NDB

Question 1

How are NDBs classified?

Answer 1

They are classified by their intended use.

Question 2

What is the usable distance of a Compass Locator?

Answer 2

15NM

Question 3

What is the usable distance of a MH Facility?

Answer 3

25NM

Question 4

What is the usable distance of an H facility?

Answer 4

50NM

Question 5

What is the usable distance of an HH facility?

Answer 5

75NM

Question 6

What are NDBs associated with and ILS called?

Answer 6

Compass Locators, LOM at outer marker, LMM at middle marker

Question 7

How do we measure identification for an NDB?

Answer 7

Tune in the correct frequency from an aeronautical chart or approach plate and listen to the Morse code shown in the identification box.

Question 8

If a voice feature is present, it should be clear and recognizable for what portion of the NDB service volume?

Answer 8

2/3

Question 9

How is an NDB SIAP inspected?

Answer 9

By flying the approach to 100’ below the MDA on the plate and make sure it takes you to the desired location.

Question 10

How is coverage measured during an NDB commissioning?

Answer 10

Fly at the minimum useable distance at an altitude of 1500 above site elevation or an altitude 1000feet above highest obstacle, 2000 feet in mountainous terrain.

Question 11

What are the maximum bearing deviations for an NDB?

Answer 11

20 degrees (+/- 10) for enroute and 10 degrees (+/-5) for approach. OT needle activity is allowed provided it doesn’t exceed 4 second on an approach flown at 130kts or 8 seconds enroute.