They are concerned less with the attainment of high speeds and rather with opening up new fields of activity for mankind on the sea bed and in the polar regions.
Banomdla kancinci ekufikeleleni kwisantya esiphezulu, kwaye kungathi ekuvulweni kwamasimi amatsha emisebenzi yoluntu kwizandla zaselwandle nakwimimandla yangasencamini yomhlaba.