Okuqukethwe kwe-AA okuphansi, inani elihle lombala kanye nokuqina okuphezulu kwe-IV, izinga lokushisa eliphansi lokucubungula, ukucaca okuphezulu kanye nokuwohloka okuncane. Kusetshenziswa kabanzi emanzini okuphuza noma ekugcwaliseni okubandayo nakwezinye izitsha zokudla njll.