If the seaway increases the foils can be folded up and the vessel continues its voyage as a displacement ship driven by an auxiliary propulsion unit.
Ukuba uhambo lwaselwandle luyanda izinyithi ezenziwe yasu-yasu ezifana nephepha zingasongwa kwaye inqanawa iqhubekeke nohambo lwayo njengenqanawa eshenxisiweyo eqhutywe ngento enxaxhileyo eqhubela phambili.