▁be ▁on ▁guard ▁for ▁Pe chen eg ▁nom ads . ▁ ▁The ▁existence ▁of ▁the ▁rap ids ▁was ▁mentioned ▁in ▁Emperor ▁Const antine ▁VII ' s ▁work ▁De ▁Administr ando ▁Imper io ▁and ▁in ▁The ▁T ale ▁of ▁Ig or ' s ▁Camp aign . ▁ ▁Names ▁of ▁the ▁major ▁rap ids ▁In ▁Ukrain ian ▁tradition , ▁there ▁were ▁ 9 ▁major ▁rap ids ▁( g iven ▁in ▁the ▁direction ▁of ▁the ▁river ▁flow ▁as ▁shown ▁in ▁the ▁picture ▁on ▁the ▁right ): ▁▁ ▁K od at sky ▁( ). ▁The ▁K od ak ▁Fort ress ▁formerly ▁stood ▁near ▁this ▁rapid . ▁ ▁Sur sky ▁( ). ▁Al most ▁all ▁the ▁rocks ▁of ▁this ▁rapid ▁were ▁sub mer ged ▁in ▁shall ow ▁water . ▁ ▁L oh ansk ▁() ▁▁ ▁D z v ones ky ▁() ▁▁ ▁N en asy te c ▁( , ▁) ▁or ▁Rev u č y ▁( , ▁), ▁the ▁biggest ▁and ▁most ▁dangerous ▁of ▁the ▁D nie per ▁Rap ids , ▁called ▁Hell ▁by ▁the ▁loc als , ▁ 2 . 4   km ▁long ▁and ▁over ▁ 1   km ▁wide . ▁Its ▁ro aring ▁could ▁be ▁heard ▁several ▁kilom eters ▁away . ▁ ▁V ov ny z ky ▁() ▁▁ ▁Bud y lo ▁() ▁▁ ▁Ly sh ny ▁( , ▁). ▁This ▁name ▁is ▁most ▁likely ▁due ▁to ▁the ▁fact ▁that ▁it ▁was ▁the ▁least ▁dangerous , ▁pos ing ▁almost ▁no ▁problems ▁for ▁navigation ▁ ▁Vil ' ny ▁( , ▁) ▁ ▁Names ▁given ▁in ▁trans