diff --git a/src/blackcore/simulator.cpp b/src/blackcore/simulator.cpp
index dcbc55bcf..154d733d5 100644
--- a/src/blackcore/simulator.cpp
+++ b/src/blackcore/simulator.cpp
@@ -972,6 +972,7 @@ namespace BlackCore
         return m + addDetails.arg(details);
     }
 
+    /** deprecated 2018-11
     bool ISimulator::clampedLog(const CCallsign &callsign, const CStatusMessage &message)
     {
         if (message.isEmpty()) { return false; }
@@ -988,6 +989,7 @@ namespace BlackCore
     {
         m_clampedLogMsg.remove(callsign);
     }
+    depreatced **/
 
     void ISimulator::setStatsRemoteAircraftUpdate(qint64 startTime, bool limited)
     {
diff --git a/src/blackcore/simulator.h b/src/blackcore/simulator.h
index b460db7eb..e7d65fb43 100644
--- a/src/blackcore/simulator.h
+++ b/src/blackcore/simulator.h
@@ -505,15 +505,17 @@ namespace BlackCore
         //! Info about invalid situation
         QString getInvalidSituationLogMessage(const BlackMisc::Aviation::CCallsign &callsign, const BlackMisc::Simulation::CInterpolationStatus &status, const QString &details = {}) const;
 
-        //! Can a new log message be generated without generating a "message" overflow
+        //! Can a (new) log message be generated without generating a "message" overflow
         //! \remark works per callsign
         //! \remark use this function when there is a risk that a lot of log. messages will be generated in a short time
-        bool clampedLog(const BlackMisc::Aviation::CCallsign &callsign, const BlackMisc::CStatusMessage &message);
+        //! \deprecated KB 2018-11
+        // bool clampedLog(const BlackMisc::Aviation::CCallsign &callsign, const BlackMisc::CStatusMessage &message);
 
         //! Mark as justed logged
         //! \remark touch, but also return if it can be logged
         //! \remark use this function when there is a risk that a lot of log. messages will be generated in a short time
-        void removedClampedLog(const BlackMisc::Aviation::CCallsign &callsign);
+        //! \deprecated KB 2018-11
+        // void removedClampedLog(const BlackMisc::Aviation::CCallsign &callsign);
 
         //! Update stats and flags
         void setStatsRemoteAircraftUpdate(qint64 startTime, bool limited = false);
diff --git a/src/blackmisc/simulation/interpolator.h b/src/blackmisc/simulation/interpolator.h
index 3bf69dd36..4b124bba6 100644
--- a/src/blackmisc/simulation/interpolator.h
+++ b/src/blackmisc/simulation/interpolator.h
@@ -279,6 +279,7 @@ namespace BlackMisc
 
             // values for current interpolation step
             qint64 m_currentTimeMsSinceEpoch = -1;                      //!< current time
+            qint64 m_lastInvalidLogTs = -1;                             //!< last invalid situation timestamp
             Aviation::CAircraftSituationList m_currentSituations;       //!< current situations obtained by remoteAircraftSituationsAndChange
             Aviation::CAircraftSituationChange m_pastSituationsChange;  //!< situations change of provider (i.e. network) situations
             CInterpolationAndRenderingSetupPerCallsign m_currentSetup;  //!< used setup
@@ -288,7 +289,6 @@ namespace BlackMisc
             int m_partsToSituationInterpolationRatio = 2;               //!< ratio between parts and situation interpolation, 1..always, 2..every 2nd situation
             int m_partsToSituationGuessingRatio = 5;                    //!< ratio between parts guessing and situation interpolation
             int m_invalidSituations = 0;                                //!< mainly when there are no new situations
-            qint64 m_lastInvalidLogTs = -1;                             //!< last invalid situation timestamp
             CStatusMessageList m_interpolationMessages;                 //!< interpolation messages
 
             Aviation::CAircraftSituation m_lastSituation { Aviation::CAircraftSituation::null() };      //!< latest interpolation
diff --git a/src/plugins/simulator/fsxcommon/simulatorfsxcommon.cpp b/src/plugins/simulator/fsxcommon/simulatorfsxcommon.cpp
index 62230ced8..466c27b2f 100644
--- a/src/plugins/simulator/fsxcommon/simulatorfsxcommon.cpp
+++ b/src/plugins/simulator/fsxcommon/simulatorfsxcommon.cpp
@@ -1426,8 +1426,7 @@ namespace BlackSimPlugin
                 if (CBuildConfig::isLocalDeveloperDebugBuild())
                 {
                     BLACK_VERIFY_X(invalidSituation, Q_FUNC_INFO, "Expect valid situation");
-                    const CStatusMessage sm = CStatusMessage(this).warning("Invalid situation for '%1'") << callsign;
-                    this->clampedLog(callsign, sm);
+                    CLogMessage(this).warning("Invalid situation for '%1'") << callsign;
                 }
             }
 
@@ -1775,7 +1774,6 @@ namespace BlackSimPlugin
                         if (isOk(hr))
                         {
                             this->rememberLastSent(result); // remember
-                            this->removedClampedLog(callsign);
                         }
                     }
                 }
@@ -1784,7 +1782,7 @@ namespace BlackSimPlugin
                     // already logged in interpolator
                     continue;
 
-                    /**
+                    /** KB removed 2018-11 as already logged in interpolator
                     static const QString so("SimObject id: %1");
                     const QString msg = this->getInvalidSituationLogMessage(callsign, result.getInterpolationStatus(), so.arg(objectId));
                     const CStatusMessage sm(this, CStatusMessage::SeverityWarning, msg);