Today in the Wall St Journal there was a story about the Canadian border being difficult to physically locate. Specifically there are border markers in the ground. These markers get buried in swampy areas and covered by brush.
Develop a wearable display enabled with GPS software that can overlay the position of the border markers within the border agents field of view. Also can provide way points to arrive at specific markers.
Target group can also include border patrol, police, and military forces.