diff --git a/src/blackgui/components/settingssimulatorcomponent.cpp b/src/blackgui/components/settingssimulatorcomponent.cpp
index 7bc85548e..6088ef9f8 100644
--- a/src/blackgui/components/settingssimulatorcomponent.cpp
+++ b/src/blackgui/components/settingssimulatorcomponent.cpp
@@ -78,7 +78,7 @@ namespace BlackGui
             connect(ui->pb_ApplyMaxDistance, &QCheckBox::pressed, this, &CSettingsSimulatorComponent::onApplyMaxRenderedDistance, Qt::QueuedConnection);
             connect(ui->pb_ApplyComSync,     &QCheckBox::pressed, this, &CSettingsSimulatorComponent::onApplyComSync,             Qt::QueuedConnection);
             connect(ui->pb_ApplyCGSource,    &QCheckBox::pressed, this, &CSettingsSimulatorComponent::onApplyCGSource,            Qt::QueuedConnection);
-            connect(ui->pb_ApplyRecordOwnAircraftGnd, &QCheckBox::pressed, this, &CSettingsSimulatorComponent::onApplyRecordGnd,       Qt::QueuedConnection);
+            connect(ui->pb_ApplyRecordOwnAircraftGnd, &QCheckBox::pressed, this, &CSettingsSimulatorComponent::onApplyRecordGnd,  Qt::QueuedConnection);
 
             connect(ui->pb_ClearRestrictedRendering, &QCheckBox::pressed, this, &CSettingsSimulatorComponent::clearRestricedRendering);
             connect(ui->pb_DisableRendering, &QCheckBox::pressed, this, &CSettingsSimulatorComponent::onApplyDisableRendering);
@@ -338,8 +338,17 @@ namespace BlackGui
             bool ok = false;
             CSimulatorSettings settings = this->getSimulatorSettings(ok);
             if (!ok) { return; }
-            CLength radius;
-            radius.parseFromString(ui->le_RecordOwnGndPositionsRadius->text());
+
+            // get value, automatically add default unit if unit is missing
+            CLength radius = CLength::null();
+            QString radiusString = ui->le_RecordOwnGndPositionsRadius->text().trimmed();
+            if (!radiusString.isEmpty())
+            {
+                if (!CMeasurementUnit::endWithValidUnitSymbol<CLengthUnit>(radiusString)) { radiusString += "m"; }
+                radius.parseFromString(radiusString);
+            }
+            ui->le_RecordOwnGndPositionsRadius->setText(radius.valueRoundedWithUnit(1));
+
             const bool c1 = settings.setRecordOwnAircraftGnd(ui->cb_RecordOwnGndPositions->isChecked());
             const bool c2 = settings.setRecordedGndRadius(radius);
             if (!c1 && !c2) { return; }
diff --git a/src/blackmisc/pq/measurementunit.h b/src/blackmisc/pq/measurementunit.h
index 6acfaba41..8a7bec489 100644
--- a/src/blackmisc/pq/measurementunit.h
+++ b/src/blackmisc/pq/measurementunit.h
@@ -471,6 +471,36 @@ namespace BlackMisc
                 return false;
             }
 
+            /*!
+             * Contains valid unit symbol?
+             * \param candidate to be tested
+             * \param caseSensitivity check case sensitiv?
+             */
+            template <class U> static bool containsValidUnitSymbol(const QString &candidate, Qt::CaseSensitivity caseSensitivity = Qt::CaseSensitive)
+            {
+                if (candidate.isEmpty()) return false;
+                for (const auto &unit : U::allUnits())
+                {
+                    if (candidate.contains(unit.getSymbol(), caseSensitivity)) { return true; }
+                }
+                return false;
+            }
+
+            /*!
+             * Ends with valid unit symbol?
+             * \param candidate to be tested
+             * \param caseSensitivity check case sensitiv?
+             */
+            template <class U> static bool endWithValidUnitSymbol(const QString &candidate, Qt::CaseSensitivity caseSensitivity = Qt::CaseSensitive)
+            {
+                if (candidate.isEmpty()) return false;
+                for (const auto &unit : U::allUnits())
+                {
+                    if (candidate.endsWith(unit.getSymbol(), caseSensitivity)) { return true; }
+                }
+                return false;
+            }
+
             //! Dimensionless unit
             static CMeasurementUnit None()
             {