diff --git a/core/function-impl/mogo-core-function-map/src/main/java/com/mogo/eagle/core/function/map/IdentifyDataDrawer.java b/core/function-impl/mogo-core-function-map/src/main/java/com/mogo/eagle/core/function/map/IdentifyDataDrawer.java
index 6e0fdd2ad5..148417d29d 100644
--- a/core/function-impl/mogo-core-function-map/src/main/java/com/mogo/eagle/core/function/map/IdentifyDataDrawer.java
+++ b/core/function-impl/mogo-core-function-map/src/main/java/com/mogo/eagle/core/function/map/IdentifyDataDrawer.java
@@ -158,8 +158,8 @@ public class IdentifyDataDrawer {
             assert cacheTrackObj != null;
             if (data.getSpeed() >= 1.5) {
                 double heading = MogoMap.getInstance().getMogoMap().getUIController().getAngle(cacheTrackObj.getLongitude(), cacheTrackObj.getLatitude(), lonLat[0], lonLat[1]);
-                double correct = heading - data.getHeading() > 30 ? heading : data.getHeading();//todo test
-                CallerLogger.INSTANCE.d(M_HMI + "arrow48", " uuid : " + uuid + " , origin heading : " + data.getHeading() + " , cal heading : " + heading + ", correct : " + correct + " , heading - data.getHeading() > 30 : " + (heading - data.getHeading() > 30));
+                double correct = Math.abs(heading - data.getHeading()) > 30 ? heading : data.getHeading();//todo test
+                CallerLogger.INSTANCE.d(M_HMI + "arrow48", " uuid : " + uuid + " , origin heading : " + data.getHeading() + " , cal heading : " + heading + ", correct : " + correct + " , heading - data.getHeading() > 30 : " + (Math.abs(heading - data.getHeading()) > 30));
                 return data.toBuilder().setHeading(heading).setLongitude(lonLat[0]).setLatitude(lonLat[1]).build();
             } else {
                 return data;