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NDB/ADF fixed card intercept question

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Old 7th Jun 2012, 19:58
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NDB/ADF fixed card intercept question

Hey guys,

I was just trying to brush myself up on these, as haven't done them in a while.

luizmonteiro - Online Simulators - ADF Simulator using that. I set myself up on 040 bearing TO the station and said alright I want to intercept the 260 bearing to the station. I feel a right turn is required here and if i turn onto say 060 i can intercept it but isn't that an 160 degree intercept then? I was taught to only do max 90 degrees so thought you couldn't do more than that.

Anyways what intercept is correct to use in this case?

cheers
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Old 7th Jun 2012, 22:08
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Draw it out on paper: the beacon, the two bearings/radials and your position. The 040 and 260 bearings to are on opposite sides of the beacon and so you are not in a position to intercept one from the other. A 160 degree cut is not an intercept heading - in fact it's a reasonable 20 degree cut to go the wrong way. Most realistically, procedurally, you would continue inbound on the 040 to the overhead then do a teardrop, outbound on about 065 for several minutes or miles then right turn onto about 230 for a 30 degree cut onto the 260 inbound. Otherwise radar vectors could put you in the right position to intercept.
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Old 7th Jun 2012, 22:27
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Thanks for your reply. When doing this I was giving myself the most drastic or exaggerated intercept I could think of to see if I was doing it correct. Glad to see now why I had to rethink it at first.
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Old 7th Jun 2012, 22:30
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So just to clarify as well. Is there a limit then in degrees where you cannot intercept another bearing or radial from your current position? And is the max intercept 90 degrees? And also when I did take up my heading of 60 degrees in my example I did cross the 260 bearing so it worked out I would have to say

Last edited by FlyingDumbells; 7th Jun 2012 at 22:34.
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