The cache is not hidden at the posted co-ordinates, there is nothing to find there.
To calculate the final GZ, solve the puzzle below and put your answer into the checker at the bottom of this listing. While no tree climbing is required at the final GZ, the container was placed using a special long tool. Please note the location of the container before retrieval and be sure to place it back exactly where found.
Delta Mike One Niner
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You can validate your puzzle solution with certitude.