109■ VehiclesRF signals may affect improperly installed or inadequately shielded electronic systemsin motor vehicles such as electronic fuel injection systems, electronic antiskid (antilock)braking systems, electronic speed control systems, and air bag systems. For moreinformation, check with the manufacturer or its representative of your vehicle or anyequipment that has been added.Only qualified personnel should service the device, or install the device in a vehicle. Faultyinstallation or service may be dangerous and may invalidate any warranty that may applyto the device. Check regularly that all wireless device equipment in your vehicle ismounted and operating properly. Do not store or carry flammable liquids, gases, orexplosive materials in the same compartment as the device, its parts, or enhancements.For vehicles equipped with an air bag, remember that air bags inflate with great force. Donot place objects, including installed or portable wireless equipment in the area over theair bag or in the air bag deployment area. If in-vehicle wireless equipment is improperlyinstalled and the air bag inflates, serious injury could result.Using your device while flying in aircraft is prohibited. Switch off your device beforeboarding an aircraft. The use of wireless devices in an aircraft may be dangerous to theoperation of the aircraft, disrupt the wireless telephone network, and may be illegal.■ Potentially explosive environmentsSwitch off your device when in any area with a potentially explosive atmosphere andobey all signs and instructions. Potentially explosive atmospheres include areas whereyou would normally be advised to turn off your vehicle engine. Sparks in such areascould cause an explosion or fire resulting in bodily injury or even death. Switch off thedevice at refueling points such as near gas pumps at service stations. Observe restrictionson the use of radio equipment in fuel depots, storage, and distribution areas; chemicalplants; or where blasting operations are in progress. Areas with a potentially explosiveatmosphere are often but not always clearly marked. They include below deck on boats,chemical transfer or storage facilities and areas where the air contains chemicals orparticles such as grain, dust, or metal powders. You should check with the
