This is due to the fact that the keel is very soon washed in on the shore, while the powerful undertow tries to suck the boat out again.
Oku kungckuba isickele sidla ngokududulelwa elunxwemeni ngokukhawuleza, nyexesha elinye umsinga onyaphantsi kwamanzi enamandla uzama ukutsala inqanawe iphume kwaphinda.