Not everything associated with the Second World War was a complete write-off. Some of the old infantry landing barges had been converted into small freighters used in the coastal trade that was so important to this area of the world. Here, one of them pulls up to the shore in Rabaul harbour to be loaded (via it's front 'troop landing' ramp) with it's next cargo for some small 'out-port' destination.
The local carrier (Air Niugini) is the best way to get to Rabaul. It's about 1.5 hours from Port Moresby, and about 20 minutes from Kimbe Bay area.
Flights are scheduled daily, but you should try to book in advance - or at the very least, be aware of the time tables.
For getting around Rabaul when no PMV's are available stand by the side of the road and wait for a lift. Unlike Moresby i felt safe hitching in Rabaul.