Navigation sounders turned off before ship hit sea floor, report notes
A preliminary report reveals that the Australian research vessel RSV Nuyina ran aground near Heard Island after its navigation sounders were intentionally turned off to prevent acoustic interference during a survey.
A preliminary report from the Australian Transport Safety Bureau (ATSB) has disclosed the circumstances surrounding the grounding of the RSV Nuyina, an Australian research vessel, off Heard Island last year. The incident occurred on October 13, when the vessel, which is part of the Australian Antarctic Division's operations and valued at $528 million, was conducting drone surveys close to uncharted areas of the sea floor. To avoid acoustic interference during these surveys, the ship's navigation echo sounders were turned off, an action that contributed to the grounding incident.
ATSB chief commissioner Angus Mitchell highlighted the critical nature of the instruments used for navigation and their role in safely operating the vessel in challenging maritime environments, such as those encountered around Heard Island, located approximately 4,000 kilometers southwest of Perth. The decision to disable these sounders, while aimed at avoiding interference with survey operations, ultimately led the ship to inadvertently collide with the seabed, raising concerns about the safety protocols followed during such research activities.
As the investigation by the ATSB progresses, a final report will be released that is expected to provide further insights and recommendations to prevent similar incidents in the future. This grounding focuses attention on the operational practices of research vessels in remote regions and the balance between conducting scientific surveys and ensuring navigational safety.