undertaken in December 2015. As of December 2019, the total surveyed length of Nettlebed/Stormy Pot is . Pearse Resurgence The Pearse Resurgence is the source of the Pearse Stream, and is the resurgence point for all caves on Mt Arthur, including all water flowing in Nettlebed Cave (under normal water levels). This has been confirmed by positive dye tests from caves in the Ellis Basin to the south, from Windrift to the west, and from Nettlebed Cave itself. On 21 March 2007, a team of international cave divers set a New Zealand cave diving record by reaching a depth of 177m (581 feet below ground level) in the Pearse Resurgence. In 2011, divers reached depth by placing four decompression habitats along the cave main tunnel but were still unable to trace the source. During the 2014 Wet Mules diving expedition, the Pearse was dived to a record depth of . In 2016, Richard Harris and Dave Hurst pushed the limits of the main spring with a 13-hour dive to explore the "Second Breakfast" passage to a depth of before lights began to implode causing them to turn back. In 2020, Richard Harris and Craig Challen reached a depth of in the resurgence. References Further reading Pugsley, C. Caves of the Mount Arthur Region Caving International #4, 1979 Atlas – Great Caves of the World Cave Books, 1989 Marcus Thomas and Neil Silverwood. Caves – Exploring New Zealand's Subterranean Wilderness Potton & Burton 2017, External links Caving areas in New Zealand Caves of the Tasman District