• where no overflow pipes are provided, the cross sectional
area of a common air pipe from several
tanks is not less than 1,25 times the area of the common
filling pipeline for these tanks
• where the tanks or spaces are situated at the shell
side, the connections to the air pipes main are to be
above the freeboard deck. Where it is not practical,
different position proposed as far as possible above
the deepest load waterline may be considered for
acceptance. For vessels subject to damage stability
requirements these connections should be above
final water line at any damaged condition assumed
by the Damage stability examination as defined in Pt
B, Ch 3, App 4, [3.5.2].