Hydrone-R
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Italian resident subsea drone that lives on the seabed for months, holding the record for an untethered autonomous subsea deployment.
Hydrone-R is Saipem's resident subsea drone, built to stay on the seabed for months instead of being launched from a support vessel for each job. It is rated to 3,000 m and works from subsea docking stations, where it recharges, uploads data, and receives new missions, covering a radius of about 10 km and further via additional docks. Onboard sensors and AI-based anomaly detection let it inspect pipelines and subsea equipment, survey the seabed, detect leaks, and do light intervention, including supporting work-class ROVs during drilling. Equinor uses it under a 10-year contract at the Njord field in the Norwegian Sea, at about 330 m depth. Its second deployment lasted 240 days, from May 2024 to January 2025, a record for continuous untethered autonomous operation by a subsea robot.
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Depth rating is 3,000 m; operations at Njord are at about 330 m. Deployed 20 May 2024 and recovered 24 January 2025 (240 days), after an earlier 165-day dive. Part of a 10-year Equinor contract for Njord and satellite fields.
