diff --git a/libraries/AP_Logger/AP_Logger.cpp b/libraries/AP_Logger/AP_Logger.cpp
index 6b0441c288..3b3dee6058 100644
--- a/libraries/AP_Logger/AP_Logger.cpp
+++ b/libraries/AP_Logger/AP_Logger.cpp
@@ -1056,6 +1056,17 @@ bool AP_Logger::Write_ISBD(const uint16_t isb_seqno,
     return backends[0]->WriteBlock(&pkt, sizeof(pkt));
 }
 
+// Wrote an event packet
+void AP_Logger::Write_Event(Log_Event id)
+{
+    struct log_Event pkt = {
+        LOG_PACKET_HEADER_INIT(LOG_EVENT_MSG),
+        time_us  : AP_HAL::micros64(),
+        id       : id
+    };
+    WriteCriticalBlock(&pkt, sizeof(pkt));
+}
+
 AP_Logger &AP::logger()
 {
     return *AP_Logger::instance();
diff --git a/libraries/AP_Logger/AP_Logger.h b/libraries/AP_Logger/AP_Logger.h
index 4101a946ca..5cdda371a2 100644
--- a/libraries/AP_Logger/AP_Logger.h
+++ b/libraries/AP_Logger/AP_Logger.h
@@ -37,6 +37,69 @@ enum AP_Logger_Backend_Type {
     DATAFLASH_BACKEND_BLOCK     = (1<<2),
 };
 
+// do not do anything here apart from add stuff; maintaining older
+// entries means log analysis is easier
+enum Log_Event : uint8_t {
+    DATA_AP_STATE = 7,
+// DATA_SYSTEM_TIME_SET = 8,
+    DATA_INIT_SIMPLE_BEARING = 9,
+    DATA_ARMED = 10,
+    DATA_DISARMED = 11,
+    DATA_AUTO_ARMED = 15,
+    DATA_LAND_COMPLETE_MAYBE = 17,
+    DATA_LAND_COMPLETE = 18,
+    DATA_NOT_LANDED = 28,
+    DATA_LOST_GPS = 19,
+    DATA_FLIP_START = 21,
+    DATA_FLIP_END = 22,
+    DATA_SET_HOME = 25,
+    DATA_SET_SIMPLE_ON = 26,
+    DATA_SET_SIMPLE_OFF = 27,
+    DATA_SET_SUPERSIMPLE_ON = 29,
+    DATA_AUTOTUNE_INITIALISED = 30,
+    DATA_AUTOTUNE_OFF = 31,
+    DATA_AUTOTUNE_RESTART = 32,
+    DATA_AUTOTUNE_SUCCESS = 33,
+    DATA_AUTOTUNE_FAILED = 34,
+    DATA_AUTOTUNE_REACHED_LIMIT = 35,
+    DATA_AUTOTUNE_PILOT_TESTING = 36,
+    DATA_AUTOTUNE_SAVEDGAINS = 37,
+    DATA_SAVE_TRIM = 38,
+    DATA_SAVEWP_ADD_WP = 39,
+    DATA_FENCE_ENABLE = 41,
+    DATA_FENCE_DISABLE = 42,
+    DATA_ACRO_TRAINER_DISABLED = 43,
+    DATA_ACRO_TRAINER_LEVELING = 44,
+    DATA_ACRO_TRAINER_LIMITED = 45,
+    DATA_GRIPPER_GRAB = 46,
+    DATA_GRIPPER_RELEASE = 47,
+    DATA_PARACHUTE_DISABLED = 49,
+    DATA_PARACHUTE_ENABLED = 50,
+    DATA_PARACHUTE_RELEASED = 51,
+    DATA_LANDING_GEAR_DEPLOYED = 52,
+    DATA_LANDING_GEAR_RETRACTED = 53,
+    DATA_MOTORS_EMERGENCY_STOPPED = 54,
+    DATA_MOTORS_EMERGENCY_STOP_CLEARED = 55,
+    DATA_MOTORS_INTERLOCK_DISABLED = 56,
+    DATA_MOTORS_INTERLOCK_ENABLED = 57,
+    DATA_ROTOR_RUNUP_COMPLETE = 58, // Heli only
+    DATA_ROTOR_SPEED_BELOW_CRITICAL = 59, // Heli only
+    DATA_EKF_ALT_RESET = 60,
+    DATA_LAND_CANCELLED_BY_PILOT = 61,
+    DATA_EKF_YAW_RESET = 62,
+    DATA_AVOIDANCE_ADSB_ENABLE = 63,
+    DATA_AVOIDANCE_ADSB_DISABLE = 64,
+    DATA_AVOIDANCE_PROXIMITY_ENABLE = 65,
+    DATA_AVOIDANCE_PROXIMITY_DISABLE = 66,
+    DATA_GPS_PRIMARY_CHANGED = 67,
+    DATA_WINCH_RELAXED = 68,
+    DATA_WINCH_LENGTH_CONTROL = 69,
+    DATA_WINCH_RATE_CONTROL = 70,
+    DATA_ZIGZAG_STORE_A = 71,
+    DATA_ZIGZAG_STORE_B = 72,
+    DATA_LAND_REPO_ACTIVE = 73,
+};
+
 // fwd declarations to avoid include errors
 class AC_AttitudeControl;
 class AC_PosControl;
@@ -88,6 +151,7 @@ public:
     void StopLogging();
 
     void Write_Parameter(const char *name, float value);
+    void Write_Event(Log_Event id);
     void Write_GPS(uint8_t instance, uint64_t time_us=0);
     void Write_RFND(const RangeFinder &rangefinder);
     void Write_IMU();
diff --git a/libraries/AP_Logger/LogStructure.h b/libraries/AP_Logger/LogStructure.h
index 5a9dcfafc1..46bb4be400 100644
--- a/libraries/AP_Logger/LogStructure.h
+++ b/libraries/AP_Logger/LogStructure.h
@@ -158,6 +158,11 @@ struct PACKED log_DSF {
     uint32_t buf_space_avg;
 };
 
+struct PACKED log_Event {
+    LOG_PACKET_HEADER;
+    uint64_t time_us;
+    uint8_t id;
+};
 struct PACKED log_GPS {
     LOG_PACKET_HEADER;
     uint64_t time_us;
@@ -1460,6 +1465,8 @@ Format characters in the format string for binary log messages
       "SBRH", "QQQQQQQQ", "TimeUS,msg_flag,1,2,3,4,5,6", "s--b----", "F--0----" }, \
     { LOG_MSG_SBPRAWM, sizeof(log_SbpRAWM), \
       "SBRM", "QQQQQQQQQQQQQQQ", "TimeUS,msg_flag,1,2,3,4,5,6,7,8,9,10,11,12,13", "s??????????????", "F??????????????" }, \
+    { LOG_EVENT_MSG, sizeof(log_Event), \
+      "EV",   "QB",           "TimeUS,Id", "s-", "F-" }, \
     { LOG_MSG_SBPEVENT, sizeof(log_SbpEvent), \
       "SBRE", "QHIiBB", "TimeUS,GWk,GMS,ns_residual,level,quality", "s?????", "F?????" }
 // #endif
@@ -1616,6 +1623,7 @@ enum LogMessages : uint8_t {
     LOG_ASP2_MSG,
     LOG_PERFORMANCE_MSG,
     LOG_OPTFLOW_MSG,
+    LOG_EVENT_MSG,
     _LOG_LAST_MSG_
 };