In a freighter the main structural bulkheads may provide the only watertight division of the hull, but in warships and passenger liners, where a tier of decks runs almost continuously forward and aft, the hull is sub-divided by watertight decks and longitudinal and transverse watertight bulkheads into what is virtually a honeycomb of watertight compartments .
Kwiinqanawa ezithutha iimpahla ezona zakhiwo zingundoqo zamacandelo enqanaweni angangeni manzi asenokunikezela ngecandelo lokuthintela amanzi kuphela esiqwini senqanawa, kodwa kwiinqanawa zemfazwe nakwiinqanawa zabakhweli, apho ithala ledekhi lisiyangaphambili nangasemva, isiqu senqanawa sahlulwe ngeedekhi ezithintela amanzi nezinamacandelo enqanaweni anagangeni manzi aneside nakwanqamlezayo kwiindawo zokuhlala.