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A9 South: No trigs/YOSM's Traditional Cache

Hidden : 3/2/2015
Difficulty:
1 out of 5
Terrain:
1.5 out of 5

Size: Size:   micro (micro)

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Geocache Description:


This cache has been placed to celebrate 15 years of geocaching.

We spotted what we thought were trig pillars but on closer inspection, we have no idea what they are. Probably base of electricity pylons. Since placing this cache, the pillars have been removed.

Trigpoints are the common name for "triangulation pillars". These are concrete pillars, about 4' tall, which were used by the Ordnance Survey in order to determine the exact shape of the country. They are generally located on the highest bit of ground in the area, so that there is a direct line of sight from one to the next. By sitting a theodolite (an accurate protractor built into a telescope) on the top of the pillar, accurate angles between pairs of nearby trigpoints could be measured. This process is called "triangulation". A major project to map out the shape of Great Britain began in 1936. The network of triangulation pillars, with accurately known positions, led to the excellent OS maps which we enjoy today.

Trig Point

Additional Hints (Decrypt)

Haqre cvyr bs fgbarf

Decryption Key

A|B|C|D|E|F|G|H|I|J|K|L|M
-------------------------
N|O|P|Q|R|S|T|U|V|W|X|Y|Z

(letter above equals below, and vice versa)