Umbhobho wethu wokutsala umbhobho odadayo wenzelwe ukukhutshwa kwezibuko kunye nedokhi yamanzi olwandle, ukuqhekeza, isanti kunye nolunye usetyenziso lokudonsa.Ngokuqhelekileyo zisetyenziselwa inxalenye yenkqubo yokwakhiwa kwee-docks kunye namachweba.