But when it is only desired to free mud from under the bilges of the vessel and not to extend the dredging as far as her keel, dredging has been effective in depths up to 26 ft.
Kodwa xa sele kufuneka ukuba kukhutshwe udaka ngaphantsi kwemiphantsi yenqanawa kwaye kungolulwa ukugutyulwa ukuya kutsho kwisiseko senqanawa, ugutyulo luphumelele kubunzulu obungamashumi amabini anesithandethu eenyawo.