The cache is not located at the listed coordinates.
At the listed coordinates you will find a Memorial that you need to use to solve DEF
D= # of names on the memorial minus 1
E= # of eagles on the memorial
F= # of snakes on the memorial
At reference point 1 you need to find ABC. Looking for a marker for N.S. Please take a moment to read the entire inscription.
AC = Birth year = 1AC1
B= # of letters in his first name
The cache is located at N39 56.ABC W75 40.DEF
Checksum = 27