Burbling is akin to cavitation and occurs when the suction abaft the rudder reaches a value equal to the vapour pressure of the water so that bubbles of water vapour are formed.
Imbopheleleko yolalwamano ukuvula umngxina kwenzeka xa ufunxo lesiqhubi lufikelela abakanaolulinganayo kumphunga onexinezelelo lwamanzi ukwenzela amaqampu amanzi enzeke.