Which makes sense when you consider that much Suez traffic is carrying either oil or more dangerously distillates or natural gas. Although if the rules are well drafted then I;d expect to see that drain hole /vent in the form of a hose nipple, so that expanding and contracting air can be exchanged to a place outside the hazardous zones for any accumulations of explosive vapours.
Which makes sense when you consider that much Suez traffic is carrying either oil or more dangerously distillates or natural gas. Although if the rules are well drafted then I;d expect to see that drain hole /vent in the form of a hose nipple, so that expanding and contracting air can be exchanged to a place outside the hazardous zones for any accumulations of explosive vapours.
