Their tall conning tower, now called a 'sail', encloses the periscopes, etc., and enables high speed to be maintained while snorting.
Eyabo ende indawo yokukopola ezinkwilini inemibhobho nezipili zokubona nayiphi na into engaba isendleleni , ngoku yabizwa ihambo emfutshane , evalele imibhobho nezipili zokubona nayiphi into esendleleni njalo-njalo , nevumela isantya esiphezulu emasigcinwe ngexa sisarhona .