Indima yesibane senkungu sangaphambili:
Isibane senkungu sangaphambili sifakwe ngaphambili kwinqwelo-mafutha kwindawo esezantsi kancinci kunesibane, esisetyenziselwa ukukhanyisa indlela xa uqhuba imvula kunye nenkungu. Ngenxa yokubonakala okuphantsi kwinkungu, indlela yokubona umqhubi ilinganiselwe. Ukungena kokukhanya kokukhanya okutyheli okuchasene nenkungu kunamandla, okunokuphucula ukubonakala komqhubi kunye nabathathi-nxaxheba bezithuthi ezijikelezileyo, ukwenzela ukuba imoto ezayo kunye nabahamba ngeenyawo bafumane omnye komnye kude.