The cache is not located near a grave... Please be respectful and cache in, trash out. Also, please only search for cache during daylight hours.
At the posted coordinates, you should look for the grave of Marine Private First Class Charles Hartung, an engineer attached to the 1st Engineer Battalion, 1st Marine Division in Vietnam. On January 6, 1970 PFC Hartung was killed as a ground casualty (explosive device) during hostile action in the Quang Nam Province of Vietnam. PFC Hartung was only 20 years old.
On the gravestone, Hartung was born in what year 19XX? Consider this AB.
Then:
N44 45.(614 + AB)
W93 37.(734 + AB)