In warships, decks up to and including the upper deck are made watertight wherever possible, and with the bulkheads they thus complete the watertight compartmentation of the ship; in addition, they lend considerable transverse and longitudinal strength to the hull.
Kwiinqanawa zemfazwe, iidekhi eziquka iidekhi eziphezulu zenziwa ukuba zingangeni manzi apho kuyimfuneko khona, kwaye xa zidibene namacandelo enqanaweni angangeni manzi zenza indawo yokuhlala engangeni manzi enqanaweni, ukwangeza, kwaye ngokwamkelekileyo kweside nokunqamleza kwamanzi zinikezela ngamandla kwisiqu senqanawa.