Club
ZO ČSS 7-02 Hranický kras
The local group of the Czech Speleological Society that explores, maps and monitors the Hranice Abyss (Hranická propast), the deepest known flooded abyss, under an exemption from Czech nature-protection law.
Group 7-02 Hranický kras of the Czech Speleological Society was founded on 1978-12-22. Its members explore the flooded and dry parts of the Hranice Abyss, which lies in the Hůrka u Hranic National Nature Reserve, and they carry out sampling, mapping and measurements for scientists under an exemption from Czech nature-protection law (Act 114/1992) [1].
The group's site documents the depth history of the abyss: Polish diver Krzysztof Starnawski reached 265 m on 2015-08-21; an ROV reached 404 m on 2016-09-27; and in summer 2022 an underwater robot operated with UNEXMIN GeoRobotics reached 450 m before technical limits stopped it, without finding the bottom [2][3]. The group also runs a monitoring station with temperature and pressure sensors in the abyss and is building a 3D model from plan maps drawn every 3 m of depth [2].
Further reading
A short history of underwater cave exploration: dated milestones
Conservation, landowners and responsible access
How underwater caves are surveyed and studied
How underwater caves form: karst, dissolution and drowned passages
Hranice Abyss geophysical study (Journal of Geophysical Research: Earth Surface) ↗
Every fact on this page, with its source (3)
| Fact | Status | Source |
|---|---|---|
| The group was founded on 1978-12-22. | Verified | [1] |
| The group's research in the abyss is carried out under an exemption from Czech Act 114/1992 on nature protection. | Verified | [1] |
| Krzysztof Starnawski reached 265 m on 2015-08-21; an ROV reached 404 m on 2016-09-27; an underwater robot reached 450 m in summer 2022.The 2022 page is undated; reader comments are dated from 2022-08-03 and the campaign ran 2022-07-27 to 2022-08-03. | Verified | [2] [3] |
Verified: stated by an official or primary source we opened. Reported: from a secondary source only. Sources conflict: the note gives both versions. May be out of date: the newest source we found is old.
Written in our own words from the sources above. Report a correction