18 - 22 March 2013
Tham Pha Phueng 'deepened' to 404m depth and length extended to 4.1km with discovery of 500m series of passages within 75m of entrance.
Cave NA0122 surveyed 340m, exploration not complete.
Guide showed us another 5 caves and shafts that need to be investigated.
Away from Ban Mani Phruk surveyed Tham Sua Dao near Ban Nam Pua Phatthana to 126m
Glenn Washburn, Tomasz Wyderka, Phil Collett, Martin Ellis

It was inevitable. At some point I was going to have to change to the WGS 1984 map datum from the Indian 1954 (Thailand-Vietnam) datum that has been used by the Thailand Caves Database. This procress has now been started, but it will be a long job and for the next couple of years there will be a mix of datums used on this site.