Nearby Hibernia Reef , northeast of Ashmore Reef , is not part of the territory , but rather belongs to Western Australia . It has no permanently dry land area , although large parts of the reef become exposed during low tide .
Nearby Hibernia Reef , 42 km northeast of Ashmore Reef , is not part of the territory , because it has no permanently dry land area , although large parts of the reef become exposed during low tide .