Periodically during a ship's life it is necessary to inspect her hull below the waterline, to clean the bottom, change propellers, etc. ; for this special docks or slips are built and the process is called docking or slipping, followed by undocking or unslipping.
Ngokwexesha lobomi benqanawa kuyimfuneko ukusoloka kuhlolwa isiqu senqanawa ngaphantsi komgca wamanzi, kucocwe umzantsi, kutshintshwe izivalo, njalo-njalo. Zedokisi ezizodwa okanye imityibilizi yakhiwa kwaye lenkqubo ibizwa ngokuba kukudokha okanye umtyibilizi, ilandelwa kukungadokhi okanye ukungatyibiliki.