This is because even when running on the surface a submarine cargo vessel will have a draught that is about.60 % of the hull diameter.
Le nto yenzeka kuba nokuba inkwili yenqanawa yomthwalo ingabaleka ngaphezulu iyakuba nobungakanani bokutshona kwenqanawa emanzini obumalunga namashumi amathandathu eepesenti zesinqumla sangqa sesiqu senqanawa.