As usual I had no GPS with me, but this time a "Pfadfinder". Because we couldn't locate the cache on the first try, we went twice around the tower, re-counting the openings carefully (under suspicious eyes of the dozen or so geomuggles). But relief, because the Pfadfinder is also a graduated mathematican - we were right the first time! :-)
So another try, and the cache was found.
Cache: fine & dry
Beate + Clemens (OCET)