diff --git a/src/FlightMap/Widgets/MapFitFunctions.qml b/src/FlightMap/Widgets/MapFitFunctions.qml
index b8197994f988a8b5afd1be00bff0c015b17059b5..64e360565098d16a544183e96b917e83aa2a24e5 100644
--- a/src/FlightMap/Widgets/MapFitFunctions.qml
+++ b/src/FlightMap/Widgets/MapFitFunctions.qml
@@ -64,7 +64,7 @@ Item {
         for (var i = 1; i < coordList.length; i++) {
             var lat = coordList[i].latitude
             var lon = coordList[i].longitude
-            if (isNaN(lat) || lat == 0 || isNan(lon) || lon == 0) {
+            if (isNaN(lat) || lat == 0 || isNaN(lon) || lon == 0) {
                 // Be careful of invalid coords which can happen when items are not yet complete
                 continue
             }
diff --git a/src/MissionManager/SurveyComplexItem.cc b/src/MissionManager/SurveyComplexItem.cc
index f54a8f43223d993e1ebdfcc26ccc2d58e2f1891b..4439b672e8a5c61f4b062fee76d3ccc317180cff 100644
--- a/src/MissionManager/SurveyComplexItem.cc
+++ b/src/MissionManager/SurveyComplexItem.cc
@@ -78,6 +78,11 @@ SurveyComplexItem::SurveyComplexItem(Vehicle* vehicle, bool flyView, const QStri
         _turnAroundDistanceFact.setRawValue(10);
     }
 
+    if (_vehicle && !(_vehicle->fixedWing() || _vehicle->vtol())) {
+        // Only fixed wing flight paths support alternate transects
+        _flyAlternateTransectsFact.setRawValue(false);
+    }
+
     // We override the altitude to the mission default
     if (_cameraCalc.isManualCamera() || !_cameraCalc.valueSetIsDistance()->rawValue().toBool()) {
         _cameraCalc.distanceToSurface()->setRawValue(qgcApp()->toolbox()->settingsManager()->appSettings()->defaultMissionItemAltitude()->rawValue());