Cache is not at the posted coordinates.
Daylight searching only. Come back at another time if mourners are present.
You will be in Brush Hill Cemetery at the grave of Louis Marpe and his family.
Look behind the headstone and you will see a small metal marker. There is some wording inside of a circle on the marker. What is the word on the bottom inside of the circle? This is your keyword. Just the letters, no punctuation needed.
Answer correctly for the final cords to be displayed.
You can validate your puzzle solution with certitude.