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This is inspired by this question. Looking at all the approach and STAR charts for EFSA in Savonlinna, Finland, they are all RNAV. The Linna VOR-DME is not used for any of them even though it is located a half mile off the arrival end of runway 12. Why is this navaid not used for any of the procedures?

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2 Answers 2

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According to the Finnish AIP, LINNA (SVL) is only a DME, not a VOR/DME.

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    $\begingroup$ I think it used to be a VOR/DME, but the VOR was probably discontinued for economic reasons. $\endgroup$
    – Bianfable
    Mar 11 at 7:21
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    $\begingroup$ Yep, that is the general plan for many VOR/DME in Europe, I think. Presumably it would be a good idea to revert that trend now, at least in areas affected by Russian intentional or "collateral" GPS jamming. $\endgroup$
    – tml
    Mar 11 at 8:01
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    $\begingroup$ @tml Most (all?) airliners can still do RNAV from DME/DME/IRU in the event of a GPS outage. No VORs needed. $\endgroup$
    – StephenS
    Mar 11 at 14:47
  • $\begingroup$ @StephenS Would the DME distances need to be listed on the charts? $\endgroup$
    – TomMcW
    Mar 11 at 16:09
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    $\begingroup$ @TomMcW Nope. The FMS already knows where all the DMEs are, so it can triangulate its own lat/long. It’s not as accurate as GNSS, of course, but RNAV/RNP was designed with different levels specifically to account for that. $\endgroup$
    – StephenS
    Mar 11 at 16:42
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The VOR was discontinued a few years back, they've been disabling VORs one by one here in Finland. It's only a DME now. (I know, I've flown a Cessna to Savonlinna a few times.)

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