According to a New Zealand navy investigation, the survey ship HMNZS Manawanui sank in October because the crew failed to turn off autopilot.
The New Zealand Ministry of Defence's Board of Inquiry today announced the results of its investigation into the incident in which the country's oceanographic survey ship HMNZS Manawanui hit a reef and sank off the coast of Samoa in early October.
"The ship sank because the autopilot was not turned off when it should have been. The autopilot continued to operate, causing HMNZS Manawanui to maintain a landward course until the collision and grounding occurred," the investigation report said.
The crew then noticed that HMNZS Manawanui was off course and attempted to change course, assuming that the ship had lost control due to a fault in the auxiliary engine control system. However, they did not check whether the autopilot was turned off. "Instead of steering clear of the hazard, the ship accelerated towards the reef," the board of inquiry said.
"The person in charge of the control system should have checked the screen to see if it showed autopilot mode," said Rear Admiral Garin Golding, Commander of the New Zealand Navy.
Defence Minister Judith Collins later said the New Zealand navy was disappointed by the error. "This is a bad day. We will not shirk our responsibility on this," he said.
The board of inquiry is expected to continue its work until the first quarter of 2025. Since the cause of the incident was determined to be human error, New Zealand naval authorities will initiate a disciplinary review process after the investigation is completed.
The three people on board at the time of the incident – the driver, the watch officer and the captain – are likely to face disciplinary action. “I want to reassure the New Zealand public that lessons will be learned from this situation and I have a responsibility to regain the public’s trust,” Rear Admiral Golding said.
The Manawanui wreck now lies at a depth of about 30 metres below the surface. It was carrying 950 tonnes of diesel fuel when it sank, raising concerns about an oil spill.
The Manawanui is 85 metres long, costing around $100 million to build, launched in Norway in 2003 and purchased by New Zealand in 2018.
VN (synthesis)