Potentially Explosive Atmospheres - Motorola HF-SSB Owner's Manual

Operational Warnings
For Vehicles with an Air Bag
Do not mount or place a mobile radio in the area over an air bag
deployment area. Air bags inflate with great force. If a radio Is
placed in the air bag deployment area and the air bag inflates,
Warning
the radio may be propelled with great force and cause serious
injury to occupants of the vehicle.

Potentially Explosive Atmospheres

Turn off your radio prior to entering any area with a potentially
explosive atmosphere. Sparks in a potentially explosive
atmosphere can cause an explosion or fire resulting in bodily
injury or even death.
The areas with potentially explosive atmospheres include fueling
areas such as 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. Areas with
potentially explosive atmospheres are often, but not always,
posted.
Blasting Caps and Blasting Areas
To avoid possible interference with blasting operations, turn off
warning your radio when you are near electrical blasting caps, in
a blasting area, or in areas posted: "Turn off two-way radio".
Warning
Obey all signs and instructions.
For radios installed in vehicles fueled by liquefied petroleum gas,
refer to the (U.S.) National Fire Protection Association standard,
NFPA 58, for storage, handling, and/or container information. For
a copy of the LP-gas standard, NFPA 58, contact the National Fire
Protection Association, One Battery Park, Quincy, MA.