Ground Penetrating Radar (GPR) + drone to locate gas pipes - YouTube
DroneBase - New GPR Drone by DroneBase • CBD Cobra Antenna... | Facebook
Drone equipped with Ground Penetrating Radar (GPR) for freshwater bathymetry - YouTube
Guldström - Ground-penetrating radar (GPR) with Drone. If you are serious about metal detecting you will need this, best thing is that is is not a Joke and it is "Made in