Don’t go to the given co-ordinates because this is a puzzle.
This is the fifth and final in the Cross Number series. Cross Number 1 – Scene Setting (GC3NJJM) has more details about solving this type of puzzle.
This is different because you are only given the down clues - that's all. That's all right because you can solve this puzzle with only the down clues. But it would be hard - very hard. If you have found the rest of the caches in the series and followed advice you have three across clues - which will help considerably. The D rating assumes that you have these clues.
The cache is actually at South 41 1A.BCD East 173 1E.FGH where ABCDEFGH are found by solving the puzzle.
