In a significant incident, the Royal New Zealand Navy’s hydrographic ship, HMNZS Manawanui, capsized and sank off the coast of Samoa last month after grounding on a reef. Preliminary findings from a military court of inquiry reveal that a series of human errors and reliance on autopilot were primary contributors to the vessel’s loss.
Key Findings from the Preliminary Investigation
The inquiry into the October 5 incident revealed that the HMNZS Manawanui’s autopilot system was not disengaged when it should have been. Crew members failed to realize the autopilot was still operational, mistakenly attributing the ship’s lack of response to a thruster control malfunction.
Despite attempts to alter course, the ship continued on its trajectory, ultimately colliding with a reef off the coast of Upolu at a speed of 10 knots (approximately 11 miles per hour). The impact was severe, and the ship traveled another 635 meters before becoming stranded.
Rear Admiral Garin Golding, Chief of the Navy, stated in a press release, “The direct cause of the grounding has been determined as a series of human errors.” He emphasized the need to address training gaps, improve risk management protocols, and revise operational procedures.
Evacuation and Aftermath
The 75 crew members and passengers onboard were safely evacuated within 30 minutes of the initial grounding, averting any fatalities or severe injuries. However, the vessel suffered catastrophic fires overnight and sank on October 6.
Rear Admiral Golding acknowledged the gravity of the situation, stating, “It is on me, as the Chief of Navy, to earn back your trust.”
The New Zealand Defence Force (NZDF) has since launched efforts to remove fuel and pollutants from the wreckage to minimize environmental damage.
Implications for the Royal New Zealand Navy
The sinking of HMNZS Manawanui represents a significant operational and financial loss for the Royal New Zealand Navy. The vessel, which entered service in 2019 and cost approximately $63 million, was primarily used for hydrographic surveys, underwater explosive disposal, and search and recovery operations.
Rear Admiral Golding assured the public that immediate audits across the fleet have been conducted, and interim lessons from the incident are being implemented. The ongoing second phase of the inquiry aims to investigate other contributing factors and ensure comprehensive reforms.
A Historical Perspective
The HMNZS Manawanui, built in 2003, was considered a vital asset for the Royal New Zealand Navy’s coastal and harbor operations. Its unexpected loss underscores the critical importance of rigorous operational training and risk assessment in naval operations.
This incident also serves as a reminder of the vulnerabilities of even modern naval vessels when human errors intersect with complex automated systems.
Moving Forward: Lessons Learned
The NZDF has emphasized its commitment to learning from this incident. Key focus areas include:
- Enhanced Training: Ensuring crews are adequately trained to manage autopilot systems and other navigational aids effectively.
- Risk Management Improvements: Strengthening protocols to prevent similar incidents.
- Revised Procedures: Updating orders and instructions to address gaps highlighted by the preliminary report.
These steps are aimed at restoring public confidence and reinforcing the operational readiness of the Royal New Zealand Navy.
Conclusion
The sinking of the HMNZS Manawanui is a sobering reminder of the complex challenges faced by modern navies. As investigations continue, the Royal New Zealand Navy’s swift response to implement corrective measures reflects its dedication to operational excellence and environmental stewardship.
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