The US Navy robotic submarine returned to the Indian Ocean’s surface after reaching the maximum depth at which it can operate.
The US Navy’s underwater drone has had its first mission cut short after exceeding its 4.5 km (2.8 mile) depth limit, Australian authorities have said this morning
The Australian agency coordinating the search and recovery operation said: “After completing around six hours of its mission, Bluefin-21 exceeded its operating depth limit of 4,500 metres and its built in safety feature returned it to the surface.
“The six hours of data gathered by the Autonomous Underwater Vehicle is currently being extracted and analysed.”
