Regulations II-2/37, 38 and 53 of
the 1974 SOLAS Convention, as amended, provide requirements for rate
of air changes which are intended to limit maximum concentration of
pollutants during loading and discharging and also to prevent a build-up
of hazardous gases in the ro-ro cargo space when the ship is at sea
with a cargo of motor vehicles. These regulations provide the minimum
acceptable standards for ventilation.