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3 Answers

JVL ILS or LOC RWY 4 – No RADAR or DME Required?

Asked by: 1421 views Airspace

Hi folks. The ILS or LOC RWY 4 approach at Janesville (KJVL) appears to require either DME or RADAR vectors, but neither is specified on the plate. Can someone explain how this approach is flown with /U equipment? (VOR, LOC, GS)

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3 Answers

  1. John D Collins on Sep 19, 2015

    It looks like a charting error to me.

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  2. David Vancina on Sep 19, 2015

    This question initiated what turned out to be a pretty lively discussion on the CFI Discussion Group (https://www.facebook.com/groups/78987704323/) on Facebook. The consensus seems to be that the transition from DAVIS (a VOR intersection on the en route chart) is to be accomplished via dead reckoning, intercepting the LOC and proceeding on course from there. The biggest issue I have with that is there’s still no way to identify WITGO, which is a step down fix if you fly the procedure as LOC instead of ILS. I guess it’s possible, but it certainly seems odd.

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  3. John D Collins on Sep 19, 2015

    I agree. There is no issue flying the DR course to intercept and track the localizer, but without a DME, one can’t determine the location of the IF. Radar is available at the location, but when radar may be used to identify a FIX, there is a notation Radar next to the fix. WITGO is an IF and not a step down. The purpose of the IF is to allow the aircraft to be configured for the approach and to descend to the altitude to intercept the GS. The aircraft could easily remain at 3100 after joining the localizer and intercept the GS at that altitude. That is 400 feet above the specified GS intercept altitude which will intercept well inside of WITGO, nominally about 1.3 NM before WEAVE. It is not the way the approach is designed to be flown, but it would be safe. I still think that the procedure should be updated.

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