Potentially explosive atmospheres
Switch off the phone of your communicator when in any area with 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.
Users are advised to switch off the phone when at a refuelling point (service
station). Users are reminded of the need to observe restrictions on 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. They include below deck on boats; chemical transfer or storage
facilities; vehicles using liquified 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.