Provincial police commander for East New Britain, Joseph Tabali, issued the caution after his men rescued a missing boat between the waters of Namatanai and Duke of York on Sunday, 30th December, 2018.
All five crew members, including the operator, were rescued with no casualties.
The boat and operator from Namatanai went missing on Saturday where unfortunately, they lost all belongings at sea.
The island of New Britain experienced rough seas and rain since Friday, the 27th.