diff --git a/src/blackmisc/simulation/interpolator.cpp b/src/blackmisc/simulation/interpolator.cpp
index 716dfe032..c774df76e 100644
--- a/src/blackmisc/simulation/interpolator.cpp
+++ b/src/blackmisc/simulation/interpolator.cpp
@@ -321,9 +321,9 @@ namespace BlackMisc
             this->m_interpolationLogs.clear();
         }
 
-        void IInterpolator::setGroundElevationFromHint(const CInterpolationHints &hints, CAircraftSituation &situation)
+        void IInterpolator::setGroundElevationFromHint(const CInterpolationHints &hints, CAircraftSituation &situation, bool override)
         {
-            if (situation.hasGroundElevation()) { return; }
+            if (!override && situation.hasGroundElevation()) { return; }
             const CAltitude elevation = hints.getGroundElevation(situation);
             if (elevation.isNull()) { return; }
             situation.setGroundElevation(elevation);
diff --git a/src/blackmisc/simulation/interpolator.h b/src/blackmisc/simulation/interpolator.h
index 551d0c36c..b51056f70 100644
--- a/src/blackmisc/simulation/interpolator.h
+++ b/src/blackmisc/simulation/interpolator.h
@@ -193,8 +193,8 @@ namespace BlackMisc
             //! \threadsafe
             static QString getHtmlPartsLog(const QList<PartsLog> &logs);
 
-            //! Set the ground elevation from hints, if possible and not already set
-            static void setGroundElevationFromHint(const CInterpolationHints &hints, BlackMisc::Aviation::CAircraftSituation &situation);
+            //! Set the ground elevation from hints
+            static void setGroundElevationFromHint(const CInterpolationHints &hints, BlackMisc::Aviation::CAircraftSituation &situation, bool override = true);
 
             //! Set on ground flag
             static void setGroundFlagFromInterpolator(const CInterpolationHints &hints, double groundFactor, BlackMisc::Aviation::CAircraftSituation &situation);