diff --git a/libraries/AP_DAL/LogStructure.h b/libraries/AP_DAL/LogStructure.h
index 873251c7dd..c8ef343584 100644
--- a/libraries/AP_DAL/LogStructure.h
+++ b/libraries/AP_DAL/LogStructure.h
@@ -40,19 +40,24 @@
     LOG_RWOH_MSG, \
     LOG_RBOH_MSG
 
-// Replay Data Structures
+// @LoggerMessage: RFRH
+// @Description: Replay FRame Header
 struct log_RFRH {
     uint64_t time_us;
     uint32_t time_flying_ms;
     uint8_t _end;
 };
 
+// @LoggerMessage: RFRF
+// @Description: Replay FRame data - Finished frame
 struct log_RFRF {
     uint8_t frame_types;
     uint8_t core_slow;
     uint8_t _end;
 };
 
+// @LoggerMessage: RFRN
+// @Description: Replay FRame - aNother frame header
 struct log_RFRN {
     int32_t lat;
     int32_t lng;
@@ -73,7 +78,8 @@ struct log_RFRN {
     uint8_t _end;
 };
 
-// Replay Data Structure - Inertial Sensor header
+// @LoggerMessage: RISH
+// @Description: Replay Inertial Sensor header
 struct log_RISH {
     uint16_t loop_rate_hz;
     uint8_t first_usable_gyro;
@@ -84,7 +90,8 @@ struct log_RISH {
     uint8_t _end;
 };
 
-// Replay Data Structure - Inertial Sensor instance data
+// @LoggerMessage: RISI
+// @Description: Replay Inertial Sensor instance data
 struct log_RISI {
     Vector3f delta_velocity;
     Vector3f delta_angle;
@@ -99,14 +106,14 @@ struct log_RISI {
 };
 
 // @LoggerMessage: REV2
-// @Description: Replay Event
+// @Description: Replay Event (EKF2)
 struct log_REV2 {
     uint8_t event;
     uint8_t _end;
 };
 
 // @LoggerMessage: RSO2
-// @Description: Replay Set Origin event
+// @Description: Replay Set Origin event (EKF2)
 struct log_RSO2 {
     int32_t lat;
     int32_t lng;
@@ -115,7 +122,7 @@ struct log_RSO2 {
 };
 
 // @LoggerMessage: RWA2
-// @Description: Replay set-default-airspeed event
+// @Description: Replay set-default-airspeed event (EKF2)
 struct log_RWA2 {
     float airspeed;
     float uncertainty;
@@ -123,8 +130,14 @@ struct log_RWA2 {
 };
 
 // same structures for EKF3
+// @LoggerMessage: REV3
+// @Description: Replay Event (EKF3)
 #define log_REV3 log_REV2
+// @LoggerMessage: RSO3
+// @Description: Replay Set Origin event (EKF3)
 #define log_RSO3 log_RSO2
+// @LoggerMessage: RWA3
+// @Description: Replay set-default-airspeed event (EKF3)
 #define log_RWA3 log_RWA2
 
 // @LoggerMessage: REY3
@@ -220,14 +233,16 @@ struct log_RGPJ {
     uint8_t _end;
 };
 
-// Replay Data Structure - Airspeed Sensor header
+// @LoggerMessage: RASH
+// @Description: Replay Airspeed Sensor Header
 struct log_RASH {
     uint8_t num_sensors;
     uint8_t primary;
     uint8_t _end;
 };
 
-// Replay Data Structure - Airspeed Sensor instance
+// @LoggerMessage: RASI
+// @Description: Replay Airspeed Sensor Instance data
 struct log_RASI {
     float airspeed;
     uint32_t last_update_ms;