An MNZ spokesman said the investigation would involve establishing facts, analysis, and then a recommendation about what, if any, further action to take.
Jane Marie ran into trouble on Thursday night while entering Oamaru Harbour with two crew on board. Both ended up in the water and were rescued before they were taken to hospital for treatment.
The MNZ spokesman said the maritime officer leading the investigation was working with the ship’s owners and crew, insurers, Otago Regional Council and others as required.
The ORC declared its pollution response to the sinking over on Sunday.