The Yabob and Bilbil people used big sailing canoes to trade their pots from Karkar Island to western Morobe. They were part of the Vitiaz Strait trade network. Bundi was the centre of trade between Astrolabe Bay and the Highlands. Trade involved shells, salt, clay pots and wooden bowls from the lowlands and stone axes, feathers and women from the Asaro, Simbu and Jimi valleys.