Directional transponder

A directional transponder

A directional transponder was a piece of equipment that allowed a soldier to pinpoint his exact position on a battlefield, and relay that information to other troops or commanding officers, fostering coordination and communication. However, directional transponders required a lot of preparation to function effectively, including a satellite in geosynchronous orbit. The units were delicate, meaning that they were prone to damage if used by regular troops in the field. They functioned better when mounted in vehicles.