evidence: The Tanzanian ferry MV Songea was built in 1988. Her operator was the Tanzania Railway Corporation Marine Division until 1997, when it became the Marine Services Company Limited. Songea plies weekly between Liuli and Nkhata Bay via Itungi and Mbamba Bay. Vessels travel about twice a week from Nkhata Bay on the lakeshore to the Likoma and Chizumulu islets, taking several hours to make the crossing. Neither of the islets has a usable port, and larger boats anchor offshore before transferring their passengers and cargoes to the islets in small watercraft.