Minnesota Spirit Quest - MnSQ: St. Johns Lutheran Cemetery
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 Army Warrant Officer Dennis Groth, who was a helicopter pilot attached to the 82md Medical Detachment deployed in Vietnam. On October 19, 1968, after dropping of a patient at the 29th EVAC Hospital, Groth passed away when his helicopter crashed into the sea. He was 21 years old.
On the gravestone, Groth died in what year 19XX? Consider this AB.
Then:
N44 44.(493 + AB)
W93 03.(216 + AB)