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prevent possible interference with sensitive medical equipment. 
Aircraft 
Turn off your wireless device whenever you are instructed to do 
so by airport or airline staff. 
Consult the airline staff about the use of wireless devices 
onboard the aircraft. If your device offers a „flight mode‟, this must 
be enabled prior to boarding an aircraft. 
Interference in Cars 
Because of possible interference with electronic equipment, 
some vehicle manufacturers forbid the use of mobile phones in 
their vehicles unless a hands-free kit with an external antenna is 
included in the installation. 
Explosive Environments 
Gas Stations and Explosive Atmospheres 
In locations with potentially explosive atmospheres, obey all 
posted signs to turn off wireless devices such as your phone or 
other radio equipment. 
Areas with potentially explosive atmospheres include fueling 
areas, below decks on boats, fuel or chemical transfer or storage 
facilities, and areas where the air contains chemicals or particles, 
such as grain, dust, or metal powders. 
Blasting Caps and Areas 
Power off your mobile phone or wireless device when in a 
blasting area or in areas posted power off “two-way radios” or 
“electronic devices” to avoid interfering with blasting operations.