This is the fourth cache in our hopefully growing series of puzzle caches. We hope that you enjoy solving and finding the caches and hopefully they may provide a fun challenge. As always we are more than happy for you to message us if you get stuck and we will try to help.
This is the fourth puzzle:

The cache can be found at N50 AxB.(C-A)(B+D)(C-D) W5 0(Dx2).(A-A)(B-A)B
You can validate your puzzle solution with
certitude.