diff --git a/src/blackgui/components/interpolationlogdisplay.cpp b/src/blackgui/components/interpolationlogdisplay.cpp
index 3d9d096d3..b904ad96a 100644
--- a/src/blackgui/components/interpolationlogdisplay.cpp
+++ b/src/blackgui/components/interpolationlogdisplay.cpp
@@ -83,6 +83,7 @@ namespace BlackGui
             connect(ui->pb_GetLastInterpolation, &QPushButton::released, this, &CInterpolationLogDisplay::getLogAmdDisplayLastInterpolation);
             connect(ui->pb_InjectElevation,      &QPushButton::released, this, &CInterpolationLogDisplay::onInjectElevation);
             connect(ui->pb_ElvClear,             &QPushButton::released, this, &CInterpolationLogDisplay::clearElevationResults);
+            connect(ui->pb_RecalcAllAircraft,    &QPushButton::released, this, &CInterpolationLogDisplay::requestRecalculateAll);
             connect(ui->pb_ClearLog,             &QPushButton::released, this, &CInterpolationLogDisplay::clearLogCommand);
             connect(ui->pb_ClearLog2,            &QPushButton::released, this, &CInterpolationLogDisplay::clearLogCommand);
             connect(ui->pb_WriteLogToFile,       &QPushButton::released, this, &CInterpolationLogDisplay::writeLogCommand);
@@ -184,7 +185,7 @@ namespace BlackGui
 
         void CInterpolationLogDisplay::getLogAmdDisplayLastInterpolation()
         {
-            if (!m_simulator) { return; }
+            if (!this->canLog()) { return; }
             const SituationLog sLog = m_simulator->interpolationLogger().getLastSituationLog();
             this->displayLastInterpolation(sLog);
         }
@@ -218,7 +219,7 @@ namespace BlackGui
 
         void CInterpolationLogDisplay::onCallsignEntered()
         {
-            if (!m_simulator)
+            if (!this->canLog())
             {
                 this->stop();
                 CLogMessage(this).warning(u"Stopping logging (log.display), no simulator");
@@ -256,7 +257,7 @@ namespace BlackGui
 
         void CInterpolationLogDisplay::onPseudoElevationToggled(bool checked)
         {
-            if (!m_simulator) { return; }
+            if (!this->canLog()) { return; }
             m_simulator->setTestEnablePseudoElevation(checked);
 
             CAltitude elvTest = CAltitude::null();
@@ -291,7 +292,7 @@ namespace BlackGui
         void CInterpolationLogDisplay::followInSimulator()
         {
             if (m_callsign.isEmpty()) { return; }
-            if (!m_simulator) { return; }
+            if (!this->canLog()) { return; }
             m_simulator->followAircraft(m_callsign);
         }
 
@@ -416,7 +417,7 @@ namespace BlackGui
 
         void CInterpolationLogDisplay::onInjectElevation()
         {
-            if (!m_simulator)  { return; }
+            if (!this->canLog())  { return; }
             const QString elv = ui->le_InjectElevation->text().trimmed();
             if (elv.isEmpty()) { return; }
 
@@ -584,13 +585,13 @@ namespace BlackGui
 
         void CInterpolationLogDisplay::requestElevation(const CAircraftSituation &situation)
         {
-            if (!m_simulator) { return; }
+            if (!this->canLog()) { return; }
             m_simulator->requestElevationBySituation(situation);
         }
 
         void CInterpolationLogDisplay::requestElevationAtPosition()
         {
-            if (!m_simulator) { return; }
+            if (!this->canLog()) { return; }
             const CCoordinateGeodetic coordinate = ui->editor_ElevationCoordinate->getCoordinate();
             const bool ok = m_simulator->requestElevation(coordinate, CInterpolationLogDisplay::pseudoCallsignElevation());
             if (ok)
@@ -605,6 +606,17 @@ namespace BlackGui
             }
         }
 
+        void CInterpolationLogDisplay::requestRecalculateAll()
+        {
+            if (!this->canLog()) { return; }
+            sApp->getIContextSimulator()->recalculateAllAircraft();
+        }
+
+        bool CInterpolationLogDisplay::canLog() const
+        {
+            return (sApp && !sApp->isShuttingDown() && sApp->getIContextSimulator() && m_simulator);
+        }
+
         const CCallsign &CInterpolationLogDisplay::pseudoCallsignElevation()
         {
             static const CCallsign cs("SW1LOX");
diff --git a/src/blackgui/components/interpolationlogdisplay.h b/src/blackgui/components/interpolationlogdisplay.h
index fce0cdb06..8e2965c72 100644
--- a/src/blackgui/components/interpolationlogdisplay.h
+++ b/src/blackgui/components/interpolationlogdisplay.h
@@ -177,6 +177,12 @@ namespace BlackGui
             //! Request arbitrary elevation
             void requestElevationAtPosition();
 
+            //! Do a full interpolation cycle for a while
+            void requestRecalculateAll();
+
+            //! Can use the log. display?
+            bool canLog() const;
+
             //! Pseudo callsign for CInterpolationLogDisplay::requestElevationAtPosition
             static const BlackMisc::Aviation::CCallsign &pseudoCallsignElevation();
 
diff --git a/src/blackgui/components/interpolationlogdisplay.ui b/src/blackgui/components/interpolationlogdisplay.ui
index afc67d618..d694549e4 100644
--- a/src/blackgui/components/interpolationlogdisplay.ui
+++ b/src/blackgui/components/interpolationlogdisplay.ui
@@ -351,16 +351,6 @@
             </property>
            </widget>
           </item>
-          <item row="3" column="1" colspan="11">
-           <widget class="QLineEdit" name="le_SimulatorSpecific">
-            <property name="readOnly">
-             <bool>true</bool>
-            </property>
-            <property name="placeholderText">
-             <string>simulator specific information</string>
-            </property>
-           </widget>
-          </item>
           <item row="0" column="0">
            <widget class="QLabel" name="lbl_CG">
             <property name="toolTip">
@@ -523,6 +513,23 @@
             </property>
            </widget>
           </item>
+          <item row="3" column="1" colspan="10">
+           <widget class="QLineEdit" name="le_SimulatorSpecific">
+            <property name="readOnly">
+             <bool>true</bool>
+            </property>
+            <property name="placeholderText">
+             <string>simulator specific information</string>
+            </property>
+           </widget>
+          </item>
+          <item row="3" column="11">
+           <widget class="QPushButton" name="pb_RecalcAllAircraft">
+            <property name="text">
+             <string>re-calc</string>
+            </property>
+           </widget>
+          </item>
          </layout>
         </widget>
        </item>