3.2.1 Under normal operational circumstances personnel shall not enter cargo
tanks, hold spaces, void spaces, or other enclosed spaces where gas may accumulate,
unless the gas content of the atmosphere in such space is determined by means of
fixed or portable equipment to ensure oxygen sufficiency and the absence of toxic
atmosphere.
3.2.2 If it is necessary to gas-free and aerate a hold space surrounding a Type
A cargo tank for routine inspection, and the cargo tank is carrying flammable cargo,
the inspection shall be conducted when the tank contains only the minimum amount of
cargo ‘heel’ to keep the cargo tank cold. The hold shall be re-inerted as soon as
the inspection is completed.
3.2.3 Personnel entering any space designated as a hazardous area on a ship
unit carrying flammable products shall not introduce any potential source of
ignition into the space unless it has been certified gas free and is maintained in
that condition. Portable gas detection equipment must be utilised at all times to
ensure personnel safety.