The cache is not at the posted coordinates..
The Adventure Lab will take you to some of the Seadogs favorite haunts in the Falls Church area.
You can learn the final coordinates for this mystery cache by completing the "Seadogs Favorite Haunts" Adventure Labs.
You will need a smartphone with data service and the Adventure Lab app installed.
You can install the app by going to Adventure Labs.
You can launch the adventure by opening the Adventure Lab app and browsing to "Seadogs Favorite Haunts".
The locations can be done in any order and there are coordinates on each location page to help in planning, each Journal entry will contain a two digit code. They can be reviewed at any time once that stage has been completed or after all stages have been completed especially your last stage.
These five two digit codes need to be put into numerical sequence to form a ten digit string that will be entered into Certitude as a keyword to receive the actual final coordinates for this cache along with bonus information.
You can validate your puzzle solution with certitude.