diff --git a/AntennaTracker/Log.cpp b/AntennaTracker/Log.cpp
index 5a70a09eb4..9fcb8059db 100644
--- a/AntennaTracker/Log.cpp
+++ b/AntennaTracker/Log.cpp
@@ -91,6 +91,7 @@ void Tracker::Log_Write_Vehicle_Startup_Messages()
 {
     logger.Write_Mode((uint8_t)mode->number(), ModeReason::INITIALISED);
     gps.Write_AP_Logger_Log_Startup_messages();
+    logger.Write_NamedValueFloat("NAV_ALT_OFS", nav_status.altitude_offset);
 }
 
 void Tracker::log_init(void)
diff --git a/AntennaTracker/tracking.cpp b/AntennaTracker/tracking.cpp
index facd7141b5..872c9d186f 100644
--- a/AntennaTracker/tracking.cpp
+++ b/AntennaTracker/tracking.cpp
@@ -166,6 +166,9 @@ void Tracker::tracking_update_pressure(const mavlink_scaled_pressure_t &msg)
 			nav_status.altitude_offset = -alt_diff;
 			nav_status.alt_difference_baro = 0;
 			nav_status.need_altitude_calibration = false;
+#if HAL_LOGGING_ENABLED
+            logger.Write_NamedValueFloat("NAV_ALT_OFS", nav_status.altitude_offset);
+#endif
 		}
     }