diff --git a/main/traffic.go b/main/traffic.go
index 73a257c5..7a7cbd9d 100644
--- a/main/traffic.go
+++ b/main/traffic.go
@@ -232,7 +232,7 @@ func sendTrafficUpdates() {
 				// altitude lower than upper boundary
 				if float32(ti.Alt) >= currAlt - float32(globalSettings.RadarLimits) * 1.3 { 
 					// altitude higher than upper boundary 
-					if !ti.BearingDist_valid || ti.Distance<float64(globalSettings.RadarRange) * 1852.0 * 1.3 {    //allow more so that aircraft moves out
+					if !ti.Position_valid || ti.Distance<float64(globalSettings.RadarRange) * 1852.0 * 1.3 {    //allow more so that aircraft moves out
 						radarUpdate.SendJSON(ti)
 					}
 				}
@@ -287,7 +287,7 @@ func registerTrafficUpdate(ti TrafficInfo) {
 		// altitude lower than upper boundary
 		if float32(ti.Alt) >= currAlt - float32(globalSettings.RadarLimits) * 1.3 { 
 			// altitude higher than upper boundary 
-			if !ti.BearingDist_valid || ti.Distance < float64(globalSettings.RadarRange) * 1852.0 * 1.3 {    //allow more if aircraft moves out
+			if !ti.Position_valid || ti.Distance < float64(globalSettings.RadarRange) * 1852.0 * 1.3 {    //allow more if aircraft moves out
 				radarUpdate.SendJSON(ti)
 			}
 		}
diff --git a/web/css/radar.css b/web/css/radar.css
index 0f32bd79..9ba848cd 100644
--- a/web/css/radar.css
+++ b/web/css/radar.css
@@ -1,3 +1,9 @@
+*:-webkit-full-screen {
+    width: 100%;
+    height: 100%;
+}
+//for iOS,Safari
+
 .radar .backRect {
     fill: black;
 }
diff --git a/web/plates/js/radar.js b/web/plates/js/radar.js
index f1b5338f..790ce7e4 100644
--- a/web/plates/js/radar.js
+++ b/web/plates/js/radar.js
@@ -527,6 +527,8 @@ function RadarCtrl($rootScope, $scope, $state, $http, $interval) {
 
 
 	$state.get('radar').onEnter = function() {
+		//reset OldRotatingValue
+		OldGPSCourse = 0;
 		// everything gets handled correctly by the controller
 	};