On a trip to Samut Sakhon, Mae Nam Tha Chin Entrance , I was surprised, when I took a boat to see the lights F2938-F2938.6 ! All lights were replaced by buoys! I took pictures from buoy 8,9,10. The boatsman told me, that many collisions with the lights were the reason for the replacement with buoys! Does the Admiralty knows these facts?