Potentially explosive atmospheres
Switch off your phone if you are in any area that has a potentially
explosive atmosphere, and obey all signs and instructions. Sparks in such
areas could cause an explosion or fire, resulting in bodily injury or even
death.
You are advised to switch off the phone while at a refueling point
(service station). And, you are reminded of the need to observe restrictions
regarding the use of radio equipment in fuel depots (fuel storage and
distribution areas), chemical plants, or where blasting operations are in
progress.
Areas with a potentially explosive atmosphere are often—but not always—
clearly marked. These areas include the following: below deck on boats;
chemical transfer or storage facilities; vehicles using liquefied petroleum
gas (such as propane or butane); areas where the air contains chemicals
or particles, such as grain, dust, or metal powders; and any other area
where you would normally be advised to turn off your vehicle engine.