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En route Exercise 16, Page 88, Question 9

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Jase88 created the topic: En route Exercise 16, Page 88, Question 9

Hi Bob and Co,

Please find attached image.

I'm having a little difficulty understanding this one. Wouldn't the tracks 346 and 253 have to be perfectly 90 degrees to each other, with the aircraft pointing 7 degrees to the left for the ADF to read 277 degrees.

Thanks
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  • John.Heddles
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  • ATPL/consulting aero engineer
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John.Heddles replied the topic: En route Exercise 16, Page 88, Question 9

Perhaps you might be overthinking things.

Presuming that you are on the direct track, as indicated, what would the ADF indicate at the abeam position in nil wind conditions ? 270R might be a good guess ?

Now, freeze the position and turn the aircraft left 7 degrees to allow for the nominated wind. The ADF needle remains pointing at the aid and must show a turn (of the needle) 7 degrees right onto 277R (due to turning the aircraft left to lay off the drift angle) ?

You really don't need to worry about tracks until you are looking at specific navigation matters.

I don't have a chart to hand but am presuming that there is a waypoint at the intersection of 346/253 ? If so, it is irrelevant to the question.

Engineering specialist in aircraft performance and weight control.
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Jase88 replied the topic: En route Exercise 16, Page 88, Question 9

Hi John,

Ahh yes i can see i have been overthinking things again, I was focusing on the direction of 253 degrees from grafton for some reason. I should have focused on the word "abeam" meaning 90 degrees to.

Thanks for your help,

Jason
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