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--- features:conditions [2020/06/06 15:26]
Andreas Breitschopp
+++ features:conditions [2021/02/14 10:19]
Andreas Breitschopp
@@ Line 168: / Line 168: @@
 {{https://www.fs-flightcontrol.com/img/manual/features/conditions/ils-visibility-custom.png?nolink|}}
-Additionally you can also set directly a custom visibility here as well.
+Additionally you can also set directly a custom visibility using a specified decision height and runway visibility as well.
+==== Reference Airport ====
+{{https://www.fs-flightcontrol.com/img/manual/features/conditions/ils-visibility-reference-airport.png?nolink|}}
+The ILS visibility needs to be defined in relation to a reference airport and runway which you can specify here.
+By default it uses the airport of the last approach in the [[features:position|Position]] module, but you can also take over your flight plan departure or arrival airport or defining any custom one.
+:i: Note: If no airport is specified here it will use the ground elevation below the current aircraft position for calculations which might lead to wrong visibility results.
 ===== Custom Weather =====