Hi Neil, Hi tli
Thank you again.
The first point looks good, because it is a dive site there.
But I am trying with other points, and it does not work:
per exemple, there is a famous dive site here, called Blue Cathedral. I know exactly where it is. (lat 9.834645, long 126.167505 on google earth)
The info that I have is this:
52174139E
1077749N
If I convert it with [Only registered and activated users can see links. ]
, it does not match.

same with other points that I have. Is it standard UTM or NATO UTM please?