Main transverse and longitudinal watertight bulkheads are not penetrated below the highest 'all-red' deck by ventilation trunking.
Okona kujika kunye nobude bamanzi aqinileyo ecandelo lecala lenqanawa elingangeni moya alinakungeniswa ngezantsi kobukhulu ``bonke obubomvu'' umgangatho wokukhuphela indlela enkulu.