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4 Answers

Radial interception

Asked by: 30026 views Instrument Rating

Hi, How to intercept a radial which is more than 90 degree from present radial. For example ,if an aircraft is at 090 radial inbound 20 dme, how to intercept radial 180 inbound...? Thank you.

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4 Answers



  1. Wes Beard on Aug 09, 2014

    Intercepting any radial is easy. You always follow the standard: tune – identify – twist to the desired radial.

    In your case since you are east of the vOR you will notice that when you select the 180° radial the CDI will deflect to the right. This means that any heading to the right on the VOR will center the needle. In this case 181° to 359°.

    Now in your specific case, there is no TO-FROM flag since you are exactly 90° off from the radial. So you will need to use some common sense. You must fly north first to intercept the 180° radial inbound. So choose a north westerly heading of 315°.

    Later on the TO-FROM flag will show “TO” indicating a south westerly heading to intercept the radial while tracking “TO” the station. When the CDI needle centers, turn to a 180° heading and track inbound.

    A lot of good information on this site talking about this subject: http://allaboutairplanes.wordpress.com/tag/vor/

    -15 Votes Thumb up 8 Votes Thumb down 23 Votes



  2. Lucas on Aug 10, 2014

    I Have made 2 videos on this one explains a better way to track and intercept VOR radials:

    http://youtu.be/q2ZJPD8L1Bk

    and the other one talks about the zone of ambiguity

    Take a look at them and let me know if this was helpful

    Cheers

    +9 Votes Thumb up 10 Votes Thumb down 1 Votes



  3. srishan on Aug 10, 2014

    Thank you so much for the explanations…
    Lucas could you please give me the link of the video one which explains about the zone of ambiguity

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  4. yudi adisaputra on Aug 30, 2014

    in your example…this is my technique,,that ive learned in my flying school…

    from radial 090 inbound(IB) to radial 180 outbound(OB)…
    angle of distance 90 degrees so i use “parallel inbound procedures”

    first……fly heading same as radial target (180) and after establish heading then timing 90 minutes

    second…..while timing set OBS 60 degrees before radial target,from radial 090 to radial 180 our track is on left,,,so 180 – 60 = 120,set OBS 120 in inbound position….

    third…….when time is up….if radial 120 not establish yet,,,use “Cut 90 inbound Procedures”…..fly heading 270 (360 – 90 = 270) then set radial 20 degrees before radial target,160 in inbound position (180 – 20 = 160)…establish radial 160 inbound use “Simple Inbound Procedures” that is fly heading 300 (360 – 60)…and set OBS 180 inbound again…two dots or a dot before (depend your VOR equipment) fly heading 360 and make CDI center.

    fourth…..when time is up but radial 120 inbound already establish,directly use ” Simple Inbound Procedures” that is fly heading 300 (360 – 60)…and set OBS 180 inbound again…two dots or a dot before (depend your VOR equipment) fly heading 360 and make CDI center.

    -19 Votes Thumb up 3 Votes Thumb down 22 Votes


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