Upgraded Jiaolong submersible completes 7,000-meter trials, dives to 7,056.9 m

China's Jiaolong manned submersible has completed 7,000-meter-class acceptance trials after its second upgrade. During three dives in the Philippine Basin it reached 7,056.9 meters on October 2, its 465th dive overall. Key components, including a high-energy-density lithium battery, low-noise thrusters, hydraulics and UHD cameras, were replaced with domestically made parts.

• Deepest dive reached 7,056.9 m on October 2, the sub's 465th dive
• A September 30 dive reached 7,035.3 meters
• Fitted with a 7,000-m oil-immersed lithium battery and domestic thrusters
• Trials were part of China's 100th ocean scientific expedition