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Recording of Webinar. Prof Simon Mitchell: Hydreliox 230 m CCR dive

Updated: Nov 17, 2023

Photo credit: Richard Harris (

This webinar was completed Nov 16th 2023 with an all-times-high 641 excited listeners. They learned how the 230 m ECCR NZ cave dive was done Feb 2023 by Richar Harris with an enormous logistical support - equipment and manpower-wise.

In case you lost the chance to participate we strongly suggest you download the webinar recording using this link.

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