Pentominos Mystery Cache
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Difficulty:
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Terrain:
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Size: 
(regular)
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The final cache in a series. Clues for the location are found from Pentominos in the other caches, which you will need to copy.
Recommend doing them in the order #1, #2, #4, #3 if you're aiming for the final on the day.
The coordinates above are a possible parking place and NOT the cache position.
There are just twelve shapes that can be made from five squares. They are called Pentominos. There are a number of ways they can be fitted together to make up a 5 x 12 rectangle like the picture below. However, once you know which shapes have the (53, 01) degrees on them there is only one way. Each of the previous caches contains three shapes, on which there are numbers, not necessarily the right way up (though the 53, 01 numbers are), but all on the same (coloured) side. Copy the shapes from the four caches and fit them together, coloured side up, to obtain the coordinates of this, the Final Cache.
The cache is a 1 litre plastic box, witrh log book and pencil. Small swaps only, please.
When you've done, walk about 100m south east to a strange rock with a groove in the top. Is it ancient, or the mark of quarrying activity?? The groove points to horizon where the sun sets in midsummer.....
You can validate your puzzle solution with certitude.
Additional Hints
(Decrypt)
Haqre n obhyqre, orgjrra gur enoovg ubyrf.