海の洞窟
Grotta Utopia
A sea-entered cave below high cliffs in the Gulf of Orosei, reached by a 30 to 40 minute boat ride from Cala Gonone. A triangular entrance shaft drops to 28 m into a large, deepening system reported at more than 7 km and explored to 120 m.
ProTec Sardinia describes the Utopia as reached by boat to a point where cliffs rise up to 400 m from the sea. Divers descend to about 13 m, where a triangular entrance in the rocks drops to 28 m; at the bottom of this shaft a very large cave system opens, first running parallel to the cliffs and then heading inland, growing larger and deeper.
According to the same provider, the cave was discovered and systematically explored by the German HFGOK group in the late 1990s to 4.2 km. In 2013 Rick Stanton and a local explorer extended Markus Schafheutle's line from 102 m to 120 m, and the provider gives the current size as more than 7 km. A 2023 Undercurrent reader report describes a guided dive to about 32 m that followed the guideline into the large opening.
The provider describes long decompression with air and recommends different gases; this is a cave for experienced, qualified cave divers.
環境
A large, roughly circular flooded tunnel system behind a deep entrance shaft, increasing in depth inland.
このページのすべての情報とその出典 (7)
| 情報 | ステータス | 出典 |
|---|---|---|
| The dive leads to about 13 m, where a triangular entrance drops to 28 m. | 報告済み | [1] |
| The entrance shaft bottoms out at about 28 m, where the main system begins. | 報告済み | [1] |
| In 2013 the line was extended from -102 m to -120 m, and the cave continues.Provider statement; no survey publication found. | 報告済み | [1] |
| The cave was discovered by the HFGOK in the late 1990s and explored to 4.2 km; the provider gives its present size as over 7 km. | 報告済み | [1] |
| A July 2023 reader report describes a dive to 31.8 m following the guideline into a very large cavern opening. | 報告済み | [2] |
| The provider says the system should only be visited by experienced cave divers. | 報告済み | [1] |
| No official access information was found; the provider reaches the site by a 30-40 minute boat ride. | 報告済み | [1] |
確認済み：直接開いた公式または一次情報源による記載。報告ベース：二次情報源のみによるもの。情報が競合：注釈に両方のバージョンを記載。最新情報でない可能性あり：確認できた最新の情報源が古い。
上記のソースをもとに、独自の言葉でまとめています。 修正を報告する