Modifications of the bucket dredgers and grab dredgers that are used in shallow waters have also been developed for deep-sea use, although only the bucket dredger principle appears suitable for commercial purposes.
Ukuguqulwa kwe-emele zokugutyula nokuthi hlasi ezisigutyuli zisetyenziwa kumanzi kumanzi angekho nzulu ziveliselwe ukusetyenziswa kumalwandle anzulu, nangona umthetho we-emele zokugutyula nguwo qha obanakala ulungile kwinjongo yorhwebo.