Indonesia and Malaysia negotiated three seabed boundaries in 1969. Those in Malacca Strait and north from Tanjong Datu on Borneo were not lines of equidistance and favoured Malaysia. Indonesia is known to prefer a water column boundary in Malacca Strait and north of Tanjong Datu that would give it seas over part of Malaysia's seabed. It is possible that the two countries will decide to negotiate solutions to the existing non-equidistant seabed boundaries and the boundary in the Celebes Sea simultaneously. Such negotiations would provide opportunities for matching concessions.