diff --git a/common/source/docs/common-sonar-L04xMTW-GL04xMT.rst b/common/source/docs/common-sonar-L04xMTW-GL04xMT.rst
index 33cbae371d..c8ca4300ce 100644
--- a/common/source/docs/common-sonar-L04xMTW-GL04xMT.rst
+++ b/common/source/docs/common-sonar-L04xMTW-GL04xMT.rst
@@ -9,8 +9,8 @@ The L04xMTW / GL04xMT is an echosounders (aka underwater sonar) with a 2 / 6 m r
 
 Supported sonar models:
 
-- L041MTW, GL041MT (max 6m range)
-- L042MTW, GL042MT (max 2m range)
+- L041MTW, GL041MT (min 5cm range, max 6m range)
+- L042MTW, GL042MT (min 2cm range, max 2m range)
 
 Recommended Hardware
 --------------------
@@ -22,7 +22,7 @@ The firmware file (sonar_to_nmea__SDDBT.ino) is located in this `repository <htt
 
 Connecting and Configuring
 --------------------------
-.. image:: ../../../images/Sonars nmea.png
+.. image:: ../../../images/GL04xMT.png
 
 The L04xMTW / GL04xMT sensors provide distance measurement.  Using Arduino nano sensor data is converted to NMEA 0183 stream. The data is transmitted to the autopilot via the serial port.