Remember, GPS devices do not function below ground or underwater. Below are additional applications: Air travel Did you know airplane systems make use of GPS in searching the ideal and most safe route in the room?Midwest Fleet and SafetyAddress: 1325 N Linwood Ave Dr, Appleton, WI 54914, United StatesPhone: +1 920-205-9644They just include the GPS receiver to their tractors and other farming equipment. It assists them to recognize which regions of land are excellent for fertilization and…See More