By G. Best bet is to contact more than 1 office and see if you get the same or a different answer.
Different CASA folks well tell you differently from different offices, or you may even get that from the same office !!.
Dont laugh its happened.
Q. How far from land can a single engined aircraft fly to another piece of land/island.
a.. 50 miles ? b..25 miles? c..Not further than gliding distance d..Not at all.
A. ??