277.4 meters in China
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happy-diver
Skindiver Just feelin it
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Here are a couple of links for you
www.prodiver-hk.com
grammarist.com
PSAI Cave Exploration in Duan, China | Scuba Diving Videos
PSAI China cave divers exploring caves on sidemount in Du'an, Guangxi, China in March 2017.
www.prodiver-hk.com
Meter vs. metre
For units of measurement, it's <em>meter</em> in the U.S. and <em>metre</em> outside the U.S. Measuring devices are spelled <em>meter</em> everywhere.
grammarist.com
Thanks for the links but the first one is not about this new event.Here are a couple of links for you
PSAI Cave Exploration in Duan, China | Scuba Diving Videos
PSAI China cave divers exploring caves on sidemount in Du'an, Guangxi, China in March 2017.
Meter vs. metre
For units of measurement, it's <em>meter</em> in the U.S. and <em>metre</em> outside the U.S. Measuring devices are spelled <em>meter</em> everywhere.
The second makes me feel good that, even though I am not an English native speaker, I am able to be culturally correct when I post on this American site
extract from the post which can be found on this link
www.facebook.com
At 2:10am, 27th April, 2023, PSAI China IT Han Ting (Greco), surface after a 12.5 hours deep cave dive and achieved a new Asia deep cave diving record to 277.4m in GuangXi, China.
Ting used two Liberty SM CCR for the dive together with the 3rd unit station at 50m for standby on the way up. His last deco was finished at 10m depth in a habitat fixed 2 weeks before. An O2/Neon mix also used as the final deco gas.
The dive is a part of the on-going project (DJCF - Duan’s Jiudun Cave Features) to explore this cave which it's bottom is still not yet to be reach.
Below is from HAN Ting after his dive:
“Yesterday, I took on a new challenge at Jiudun and eventually reached a turning point at 277 meters, breaking the Asian record.
In previous attempts, I went south-north for deep diving, but this time I tried diving both up and down in the northern cave. The descent was slower and more winding, making the situation more complicated. From the 40-meter cave entrance, I had to swim through a 20-meter horizontal passage to reach the 50-meter vertical well entrance. The 50-120 meter vertical well passage was quite narrow, followed by a slope from 120-170 meters until reaching the vertical well below 170 meters. Additionally, some slight ear equalization problem caused some delay. The planned depth was between 270-290 meters, with an alert time of 15 minutes set for turning back and a mandatory decompression plan of no more than 12 hours. When I reached over 270 meters, I felt very good, and HPNS did not show any obvious effect. When the Alert sounded, I hesitated for a second, as I knew I could break the world record by just one more minute. However, I was pleased that I resisted the temptation, stopped the descent according to plan, tied knots, marked the arrow, and ascended. The later decompression was perfectly in line with the plan. There will be more opportunities in the future.
I tried many new methods this time, such as setting up a decompression habitat in advance at 10 meters, which was very useful. During the 12-and-a-half-hour dive, I spent five hours in the tent eating and drinking comfortably.
I also made significant adjustments to the decompression plan, using neon as a replacement for inert gas to accelerate decompression. The results were very significant, as I felt better both physically and mentally after the dive. I am grateful for the professional guidance from DHS and the on-site medical support. We used ultrasound to check for bubbles in the decompression habitat. Additionally, I did an extreme test for the Huawei ULTIMATE sport watch, take it down to 123 meters and hanging it on a node during the descent and carrying it throughout the return journey. The depth was not a problem, and the battery was very powerful, with over 20% remaining after 12 and a half hours.
Summary: Technology can help explorers break through limits and explore extreme environments more safely and efficiently.
Finally, thanks to the 'underwater support team' @john @Edi @king @kiki, and the 'surface and land support team' @Director Song @Chung Siu @Violet @Director Zhao and photographer, as well as all the friends who provided equipment support! “
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PSAI China
1d ·At 2:10am, 27th April, 2023, PSAI China IT Han Ting (Greco), surface after a 12.5 hours deep cave dive and achieved a new Asia deep cave diving record to 277.4m in GuangXi, China.
Ting used two Liberty SM CCR for the dive together with the 3rd unit station at 50m for standby on the way up. His last deco was finished at 10m depth in a habitat fixed 2 weeks before. An O2/Neon mix also used as the final deco gas.
The dive is a part of the on-going project (DJCF - Duan’s Jiudun Cave Features) to explore this cave which it's bottom is still not yet to be reach.
Below is from HAN Ting after his dive:
“Yesterday, I took on a new challenge at Jiudun and eventually reached a turning point at 277 meters, breaking the Asian record.
In previous attempts, I went south-north for deep diving, but this time I tried diving both up and down in the northern cave. The descent was slower and more winding, making the situation more complicated. From the 40-meter cave entrance, I had to swim through a 20-meter horizontal passage to reach the 50-meter vertical well entrance. The 50-120 meter vertical well passage was quite narrow, followed by a slope from 120-170 meters until reaching the vertical well below 170 meters. Additionally, some slight ear equalization problem caused some delay. The planned depth was between 270-290 meters, with an alert time of 15 minutes set for turning back and a mandatory decompression plan of no more than 12 hours. When I reached over 270 meters, I felt very good, and HPNS did not show any obvious effect. When the Alert sounded, I hesitated for a second, as I knew I could break the world record by just one more minute. However, I was pleased that I resisted the temptation, stopped the descent according to plan, tied knots, marked the arrow, and ascended. The later decompression was perfectly in line with the plan. There will be more opportunities in the future.
I tried many new methods this time, such as setting up a decompression habitat in advance at 10 meters, which was very useful. During the 12-and-a-half-hour dive, I spent five hours in the tent eating and drinking comfortably.
I also made significant adjustments to the decompression plan, using neon as a replacement for inert gas to accelerate decompression. The results were very significant, as I felt better both physically and mentally after the dive. I am grateful for the professional guidance from DHS and the on-site medical support. We used ultrasound to check for bubbles in the decompression habitat. Additionally, I did an extreme test for the Huawei ULTIMATE sport watch, take it down to 123 meters and hanging it on a node during the descent and carrying it throughout the return journey. The depth was not a problem, and the battery was very powerful, with over 20% remaining after 12 and a half hours.
Summary: Technology can help explorers break through limits and explore extreme environments more safely and efficiently.
Finally, thanks to the 'underwater support team' @john @Edi @king @kiki, and the 'surface and land support team' @Director Song @Chung Siu @Violet @Director Zhao and photographer, as well as all the friends who provided equipment support! “
fsardone
Solo Diver
Rather than a second BOB was needed for deco.
Liberty has a radial 2.5 kg scrubber and it wont be able to do the 12 hours needed. So you dive with 2 and the bob in case of failure allows you to get to the deco reb. You’ll need at least 2 reb to do the dive. One is spare.
Liberty has a radial 2.5 kg scrubber and it wont be able to do the 12 hours needed. So you dive with 2 and the bob in case of failure allows you to get to the deco reb. You’ll need at least 2 reb to do the dive. One is spare.
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