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## CASA sample question ADF relative bearing

• le.thianh@hotmail.com
• Topic Author

### le.thianh@hotmail.com created the topic: CASA sample question ADF relative bearing

Hi, is there anyone can help me with the question below. Much appreciated!
An aircraft is situated to the east of an NDB and is required to intercept a track of 030M from that NDB. If the aircraft takes up a HDG of 330M, what is the relative bearing that would indicate the aircraft has intercepted the required track?

• Posts: 2253

### bobtait replied the topic: CASA sample question ADF relative bearing

330______+/-ADF__= 030 From (that takes you through north so call it 390)
333______+ 60 from = 180 + 60 = 240 Relative.

##### Attachments:

Alternatively you could use Bob HAT trick. Given Heading is 330 and Track is 030 from the NDB

330 +/- A = 210 (QDM: Magnetic track to the station, i.e. reciprocal of 030+180)
A = -120 To (which follows the arc 360 - 120 anti clockwise = 240 degree RB)

or

330 +/- A = 030 (QDR: Magnetic track from the station)
A = -300 From (which follows the arc 180 - anti clockwise 300 = 240 degree RB)

Hope that helps