Mid-bank buoys are mostly spherical, while wreck and spoil ground (dumping site) buoys are spar buoys.
Imibindi yodonga yomqondiso obhabhayo wengozi isoloko ingqukuva ngelixesha ukuqhekeka nokumosheka komhlaba (indawo ekulahlwa kuyo) wemiqondiso ebhabhayo yengozi iyintsika.