A device that detects what is underground ................

A device that detects metallic bridges underground

To send a message to someone who isn't close to you, taking care not to share your personal number, you must use ...............

The global positioning system (GPS) is used to explore underground minerals

The engineers relied on the magnetometer to locate the construction sites

Ground Penetrating Radar is used to detect objects buried underground

The tourist doesn't depend on the ground penetrating radar to locate different places

The goal of adding the global positioning system (GPS) to all smart phones is to detect the locations of antiquities

Albert Lean is an astronaut