I have just received the following info.
""Mv Mwande has added another route to its schedule. Nkhata Bay to Mbamba – Bay ( Tanzania)
Depart Nkhata Bay at 06:30 am and arrive at 09:30 in Mamba – Bay.
In time for a bus leaving for Dar Salam at 10:00 to arrive the same day at 19:00
Avoid that long harrowing bus ride.
The boat leaves Mbamba Bay at 13:30 to arrive in Nkhata Bay at 17:30""