diff --git a/src/MultiPlayer/multiplaymgr.cxx b/src/MultiPlayer/multiplaymgr.cxx
index 2e34b6e..e79c90c 100644
--- a/src/MultiPlayer/multiplaymgr.cxx
+++ b/src/MultiPlayer/multiplaymgr.cxx
@@ -1455,28 +1455,28 @@ FGMultiplayMgr::SendMyPosition(const FGExternalMotionData& motionInfo)
         float xxx =  n->getDoubleValue();
         PosMsg->jwhtext[3] = XDR_encode_float (xxx);
        
-        xxx = fgGetDouble("/instrumentation/gps/indicated-vertical-speed");
+        xxx = fgGetDouble("/instrumentation/gps/indicated-vertical-speed",true);
         PosMsg->jwhtext[4] = XDR_encode_float (xxx);
 
-        xxx = fgGetDouble("/instrumentation/airspeed-indicator/indicated-speed-kt");  //指示空速
+        xxx = fgGetDouble("/instrumentation/airspeed-indicator/indicated-speed-kt",true);  //指示空速
         PosMsg->jwhtext[5] = XDR_encode_float (xxx);
 
-        xxx = fgGetDouble("/instrumentation/airspeed-indicator/true-speed-kt");  //真空速
+        xxx = fgGetDouble("/instrumentation/airspeed-indicator/true-speed-kt",true);  //真空速
         PosMsg->jwhtext[6] = XDR_encode_float (xxx);
         
-        xxx = fgGetDouble("/instrumentation/gps/indicated-longitude-deg");
+        xxx = fgGetDouble("/instrumentation/gps/indicated-longitude-deg",true);
         PosMsg->jwhtext[7] = XDR_encode_float (xxx);
         
-        xxx = fgGetDouble("/instrumentation/gps/indicated-latitude-deg");
+        xxx = fgGetDouble("/instrumentation/gps/indicated-latitude-deg",true);
         PosMsg->jwhtext[8] = XDR_encode_float (xxx);
         
-        xxx = fgGetDouble("/instrumentation/gps/indicated-altitude-ft");
+        xxx = fgGetDouble("/instrumentation/gps/indicated-altitude-ft",true);
         PosMsg->jwhtext[9] = XDR_encode_float (xxx);
                 
-        xxx = fgGetDouble("/instrumentation/comm/frequencies/selected-mhz");   //守护频点
+        xxx = fgGetDouble("/instrumentation/comm/frequencies/selected-mhz",true);   //守护频点
         PosMsg->jwhtext[10] = XDR_encode_float (xxx);
 
-        xxx = fgGetDouble("/instrumentation/transponder/id-code");
+        xxx = fgGetDouble("/instrumentation/transponder/id-code",true);
         PosMsg->jwhtext[11] = XDR_encode_float (xxx);
         
         //n = fgGetNode("");