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Jiaolong’s Upgraded Submersible Passes 7,000-Meter Sea Trials
Jiaolong completed three 7,000 meter class trial dives after its second upgrade; two went deeper than 7,000 meters, the deepest reached 7,056.9 meters, and all trial indicators met requirements. The upgrade included a high energy density lithium battery pack, domestically produced thrusters, hydraulic system changes...
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Key takeaways
- Jiaolong completed three 7,000 meter class trial dives after its second upgrade; two went deeper than 7,000 meters, the deepest reached 7,056.9 meters, and all trial indicators met requirements.
- The upgrade included a high energy density lithium battery pack, domestically produced thrusters, hydraulic system changes, and upgraded cameras.[2][3]
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openai.comCreate a landscape editorial hero image for this Studio Global article: What did China’s Jiaolong manned submersible’s 7,000-meter-class sea trials demonstrate after its second round of upgrades, as reported by X. Article summary: Jiaolong’s trials demonstrated that, after its second round of upgrades and replacement of key components with domestically made alternatives, it could safely complete repeated 7,000-meter-class dives while meeting every. Topic tags: general, general web. Style: premium digital editorial illustration, source-backed research mood, clean composition, high detail, modern web publication hero. Use reference image context only for broad subject, composition, and topical grounding; do not copy the exact image. Avoid: logos, brand marks, copyrighted characters, real person likenesses, fake screenshots, UI text, readable text, watermarks, charts with fake numbers, clic
Jiaolong completed three 7,000-meter-class sea-trial dives in the Philippine Basin after its second round of upgrades. Two dives exceeded 7,000 meters, the deepest reached 7,056.9 meters, and all trial indicators met the specified requirements. A researcher quoted by Xinhua said the results verified the upgraded submersible’s reliability and safety.2
What the sea trials demonstrated
The tests took place during the second leg of China’s 100th ocean scientific expedition and completed the 7,000-meter-class sea trials for a national key research and development project focused on improving Jiaolong’s operational capabilities and scientific applications.2
The dive results included:
- September 30: Jiaolong’s 464th dive reached 7,035.3 meters. Pilot Zhang Yi set a personal depth record.
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- October 2: Its 465th dive reached 7,056.9 meters, the expedition leg’s deepest recorded dive. Pilot Qi Haibin set a personal depth record.
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The three test dives, two of them deeper than 7,000 meters, ended with the submersible returning safely. Xinhua reported that all trial indicators met the 7,000-meter-class requirements.2
Upgrades put to the test
Before the expedition, Jiaolong received several systems and component upgrades, including:2
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- A high-energy-density, oil-immersed lithium battery pack rated for 7,000-meter-class operations.
- Domestically produced, direct-drive, low-noise DC thrusters.
- Expanded interfaces for the emergency hydraulic system.
- A deep-water seawater-hydraulic buoyancy adjustment system.
- Wide-angle, high-zoom ultra-high-definition cameras.
The trials were the first 7,000-meter-class sea tests after this second upgrade and the replacement of key components with domestically made alternatives.3
What the results do—and don’t—show
The reported dives show that Jiaolong met the specified requirements during these tests, including two descents beyond 7,000 meters. Sun Yongfu, a researcher at China’s National Deep Sea Center, said the results verified the upgraded submersible’s reliability and safety.2
That is evidence about the trial performance, not a basis for assuming unreported capabilities or outcomes. The available reporting does not provide detailed test measurements for each upgraded system, so the results should be understood as an overall sea-trial assessment rather than a separate performance verdict on every component.
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Jiaolong completed three 7,000 meter class trial dives after its second upgrade; two went deeper than 7,000 meters, the deepest reached 7,056.9 meters, and all trial indicators met requirements.
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Jiaolong completed three 7,000 meter class trial dives after its second upgrade; two went deeper than 7,000 meters, the deepest reached 7,056.9 meters, and all trial indicators met requirements. The upgrade included a high energy density lithium battery pack, domestically produced thrusters, hydraulic system changes, and upgraded cameras.[2][3]