Llanwnda Church Spire Intersected Station
Another YOSM cache, this time in Llanwnda. The posted coordinates are not of the cache but of the trig. See if you can find the flush bracket present on the church building.
This trig doesn't have any 'occupiable marks' like the pillars we often see on hill tops, it features instead as an 'intersected station' - more info can be found on the trigpointing UK wiki for those interested.
To work out the final cache location, you'll need to do some triangulation of your own. The cache is exactly:
11453 meters from the Bwlch Mawr trig
4845 meters from the Twthill trig
and 9467 meters from the Garnedd Goch trig
I recommend using the grid references provided on trigpointing UK to improve accuracy and the intersection of circles calculator available on 'Geocaching Toolbox'. You could always try using a pencil and OS map for fun... Enjoy!
You can validate your puzzle solution with
certitude.
About Ye Ole Survey Monuments
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Ye Ole Survey Monument (YOSM) is a captivating series of caches that pays homage to the remarkable legacy of OutForTheHunt's YSM series (GC45CC).
YOSM caches are strategically positioned at or near Trig Points. These triangulation stations have played a pivotal role as surveying landmarks, contributing to the mapping of expansive territories.
Some of these points, bearing historical significance, might now be situated on private land or have vanished with time. As a result, the caches are artfully placed in close proximity, reverently acknowledging the historical importance of these survey monuments.
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More information, bookmarks and statistics can be found at the YOSM Website
If anybody would like to expand the Ye Ole Survey Monuments Series, please do.
I would ask that you request a number for your cache first at www.yosm.org.uk
so we can keep track of the numbers and names to avoid duplication.