The most important are the hogging and sagging stresses, caused by pitching head-on into heavy seas, which tend to break her back .
Okona kubaluleke kakhulu kuxinzelelo lwenqanawa kukuhla nokunyuka komva nomphambili okwenziwa ngamanzi kunye nokubhena kwenqanawa, okubangelwa ngamanzi olwandle olulwayo, adla ngokuyaphula umva inqanawa.