diff --git a/libraries/AP_Logger/LogStructure.h b/libraries/AP_Logger/LogStructure.h
index c1d4b72bf4..4185c8c496 100644
--- a/libraries/AP_Logger/LogStructure.h
+++ b/libraries/AP_Logger/LogStructure.h
@@ -499,6 +499,7 @@ struct PACKED log_ARSP {
     bool    use;
     bool    healthy;
     float   health_prob;
+    float   test_ratio;
     uint8_t primary;
 };
 
@@ -1243,7 +1244,7 @@ LOG_STRUCTURE_FROM_PRECLAND \
     { LOG_RADIO_MSG, sizeof(log_Radio), \
       "RAD", "QBBBBBHH", "TimeUS,RSSI,RemRSSI,TxBuf,Noise,RemNoise,RxErrors,Fixed", "s-------", "F-------", true }, \
 LOG_STRUCTURE_FROM_CAMERA \
-    { LOG_ARSP_MSG, sizeof(log_ARSP), "ARSP",  "QBffcffBBfB", "TimeUS,I,Airspeed,DiffPress,Temp,RawPress,Offset,U,H,Hp,Pri", "s#nPOPP----", "F-00B00----", true }, \
+    { LOG_ARSP_MSG, sizeof(log_ARSP), "ARSP",  "QBffcffBBfB", "TimeUS,I,Airspeed,DiffPress,Temp,RawPress,Offset,U,H,Hp,TR,Pri", "s#nPOPP-----", "F-00B00-----", true }, \
     LOG_STRUCTURE_FROM_BATTMONITOR \
     { LOG_MAG_MSG, sizeof(log_MAG), \
       "MAG", "QBhhhhhhhhhBI",    "TimeUS,I,MagX,MagY,MagZ,OfsX,OfsY,OfsZ,MOX,MOY,MOZ,Health,S", "s#GGGGGGGGG-s", "F-CCCCCCCCC-F", true }, \