If the extent of the shoal water is limited by land a backwash is set up which results in a confused sea with dangerously steep and breaking waves.
Okokuba ulwenzeko olwentlaninge yamanzi inyinwe ngumhlaba uhlambo lwangasemva luyenziwa oluba neziphumo ezikukuphazamiseka kolwandle olunamaza aphakamileyo nophukayo.