The same kind of navigation marks, when in transit, can indicate the safe course to clear an obstruction, rocks, etc., leading to either a safe anchorage or entrance down a channel.
Uhlobo olunye okanye olufanayo leziphawuli zokulawula, kwisithuthi, ingabonakalisa indlela ekhuselekileyo ukususa izithinteli, amatye, njalo-njalo, ekhokelele okanye kwindawo ekhuselekileyo apho inqanawa ikhululwa khona ukuba ihambe ngokukhawuleza okanye kuminyango ongenela umfula.