At the published coordinates you will find the "National Serviceman's Memorial". I encourage you to visit this exhibit which has recently been enhanced with the addition of a 150mm Field Gun.
To calculate GZ, project a new set of coordinates from the published coordinates, using the following information:
Bearing: 79.817 degrees
Distance: 407.87 metres
You may find this site useful: Coordinate Projection
At GZ you are looking for a camouflaged micro container.
** Congrats to foxyontherun for FTF! **