64Using your device while flying in aircraft is prohibited. Switch offyour device before boarding an aircraft. The use of wirelessteledevices in an aircraft may be dangerous to the operation of theaircraft, disrupt the wireless telephone network, and may be illegal.■ Potentially explosive environmentsSwitch off your device when in any area with a potentiallyexplosive atmosphere, and obey all signs and instructions.Potentially explosive atmospheres include areas where you wouldnormally be advised to turn off your vehicle engine. Sparks insuch areas could cause an explosion or fire resulting in bodilyinjury or even death. Switch off the device at refueling pointssuch as near gas pumps at service stations. Observe restrictionson the use of radio equipment in fuel depots, storage, anddistribution areas; chemical plants; or where blasting operationsare in progress. Areas with a potentially explosive atmosphere areoften, but not always, clearly marked. They include below deck onboats, chemical transfer or storage facilities and areas where theair contains chemicals or particles such as grain, dust, or metalpowders. You should check with the manufacturers of vehiclesusing liquefied petroleum gas (such as propane or butane) todetermine if this device can be safely used in their vicinity.