Pathfinder (military)
A pathfinder is a paratrooper who is inserted or dropped into place in order to set up and operate drop zones, pickup zones, and helicopter landing sites for airborne operations, air resupply operations, or other air operations in support of the ground unit commander. Pathfinders first appeared in World War II and continue to serve an important role in today's modern military, providing Commanders with the option of flexibly employing air assets.
Read more about Pathfinder (military): Modern Pathfinders