If you zoom out on the map a bit, it looks like the Captain's Arrow is pointing you right to the cache. I put this a little bit away from the actual arrow since it's a live test facility and they're doing construction there now, but it's an easy drive to GZ in a 4WD vehicle or a short walk.
**** Note **** Note ****
This cache is located on the Eglin AFB reservation. Hunters and or wild life may be in this area as well as military personal conducting maneuvers. It is possible unexploded ordinance could be in the area so be aware of your surroundings.
****Also note due to training and missions the areas maybe closed at certain days of the week or times. Please check this site for closures in the area before going after the caches on Eglin Reservation. Before entering the Eglin AFB reservation, you must check the current day's Jackson Guard PDF map at (visit link)
A permit granting you legal access to the Eglin AFB Reservation is required to seek and find ANY cache on Eglin AFB Reservation!!! You must have this permit and it must be in your possession. The Jackson Guard will check. For $30 you get an outstanding map and a year-long Recreational Permit. The yearly permits are valid from Oct 1 thru Sept 30 each year. You can get your permit from the "Jackson Guard" either in person or by mail (send a copy of your driver's license).
Address: Eglin AFB Natural Resources Office
107 Hwy 85 North
Niceville, FL 32578
Phone: (850) 882-4164
Coords: N 30° 31.49' W 86° 29.57'
Hrs: Mon-Fri 0730-1630