In this type, all three super-structures are extended to form a continuous non-watertight superstructure from bow to stern.
Kolu hlobo, zontanthu izakhiwo ezingaphezulu kwezinye zinyusiwe ukwakha uphindwano olungena kuqinisa manzi kwisakhiwo esingaphezulu kwesinye esisuka kwiqhina lomva wenqanawa.