diff --git a/src/blackmisc/geo/elevationplane.cpp b/src/blackmisc/geo/elevationplane.cpp
index 0ee3dbbe3..5893513b1 100644
--- a/src/blackmisc/geo/elevationplane.cpp
+++ b/src/blackmisc/geo/elevationplane.cpp
@@ -103,6 +103,11 @@ namespace BlackMisc
             return a;
         }
 
+        double CElevationPlane::getAltitudeValue(const CLengthUnit &unit) const
+        {
+            return this->getAltitude().value(unit);
+        }
+
         bool CElevationPlane::isNull() const
         {
             return m_radius.isNull() || CCoordinateGeodetic::isNull();
diff --git a/src/blackmisc/geo/elevationplane.h b/src/blackmisc/geo/elevationplane.h
index 3cb5f8429..82281d754 100644
--- a/src/blackmisc/geo/elevationplane.h
+++ b/src/blackmisc/geo/elevationplane.h
@@ -94,6 +94,9 @@ namespace BlackMisc
             //! Altitude (synonym for geodetic height)
             Aviation::CAltitude getAltitudeInUnit(const PhysicalQuantities::CLengthUnit &unit) const;
 
+            //! Altitude (synonym for geodetic height)
+            double getAltitudeValue(const PhysicalQuantities::CLengthUnit &unit) const;
+
             //! Existing value?
             virtual bool isNull() const override;
 
diff --git a/src/blackmisc/simulation/simulationenvironmentprovider.cpp b/src/blackmisc/simulation/simulationenvironmentprovider.cpp
index 148e95ba7..a45218377 100644
--- a/src/blackmisc/simulation/simulationenvironmentprovider.cpp
+++ b/src/blackmisc/simulation/simulationenvironmentprovider.cpp
@@ -257,6 +257,12 @@ namespace BlackMisc
             return m_cgsPerCallsign.remove(cs);
         }
 
+        void ISimulationEnvironmentProvider::removePendingElevationRequest(const CCallsign &cs)
+        {
+            QWriteLocker l(&m_lockElvCoordinates);
+            m_pendingElevationRequests.remove(cs);
+        }
+
         CLength ISimulationEnvironmentProvider::minRange(const CLength &range)
         {
             return (range.isNull() || range < CElevationPlane::singlePointRadius()) ?
diff --git a/src/blackmisc/simulation/simulationenvironmentprovider.h b/src/blackmisc/simulation/simulationenvironmentprovider.h
index 8c898e176..e2a159298 100644
--- a/src/blackmisc/simulation/simulationenvironmentprovider.h
+++ b/src/blackmisc/simulation/simulationenvironmentprovider.h
@@ -274,6 +274,11 @@ namespace BlackMisc
             //! \threadsafe
             int removeSimulatorCG(const Aviation::CCallsign &cs);
 
+            //! Remove pending timestamp
+            //! \threadsafe
+            //! \remark useful if we ignore the probe response on sim. side
+            void removePendingElevationRequest(const Aviation::CCallsign &cs);
+
             //! Min.range considered as single point
             static PhysicalQuantities::CLength minRange(const PhysicalQuantities::CLength &range);