You will find a benchmark the above coordinates. This will lead you to the cache after some math is done. You can find the cache at: N 33° 3A.E(C+D)(E-A) W 117° 3(E+C).(C+D)(E+C)F. There should be stamping on the benchmark that follows this format. #XX-##-##. If you see # that means it is a number. If you see X, that means its a letter on the stamping of the benchmark. So here you go, fill in the missing blanks from the templete above and now look at this sequence once completed and that is how to find the coordinates. Please refer to the missing coordinates. For example, for whatever A equals in the this sequence, it is the same as the missing coordinates AXX-CD-EF.
Checksum for the missing coordinate values (last four digits on each) equals 43.
Ok, plug in the coordinates into your GPS. You are looking for a non-camoed bison tube. Please sign the log and replace as found. BYOP