天坑
Boesmansgat
The single entrance to the Boesmansgat sinkhole on a private game farm in the Northern Cape: a narrow crack leading to a vast, very deep flooded chamber used for record-depth expeditions.
The dive entrance to Boesmansgat is a small crack, roughly 1.5 m by 3 m, at the bottom of a steep scramble on Mount Carmel game farm. Below it the flooded chamber widens rapidly into a very large void that continues to a silty floor at roughly 282-286 m.
Diving here is expedition work. A 2002 team needed about five hours just to move its equipment to the water's edge, and reported the nearest recompression chamber as about seven hours away. The documented dives are deep, long and supported by large teams, and the site is on private land with no public access procedure.
环境
Clear, still fresh water of about 19 C (1996 and 2002 reports) in a huge dark chamber; brown mud on the walls absorbs light, and the bottom is fine silt that clouds easily. At about 1,500 m altitude, decompression has to be adjusted for the lower air pressure.
环境条件
Temperature figures are from 1996 and 2002. The water level has changed over time.
典型范围来自已发表资料，不代表当前实际状况。
设施
No dive facilities are documented; a 2002 team described a steep scramble to the water, a five-hour equipment carry and a recompression chamber about seven hours away.
仅供方位参考，不可用于导航。空心圆点为大致位置。
本页所有信息及其来源 (8)
| 信息条目 | 状态 | 来源 |
|---|---|---|
| Boesmansgat is on Mount Carmel, a game farm near the Kuruman-Danielskuil road, about a 30-minute drive from the farmhouse. | 已报告 | [1] [2] |
| Area-level coordinates only; the entrance is on private land.Rounded to 0.1 degree on purpose. | 已报告 | [3] [1] |
| The deepest point reached is 282.6 m (Gomes, 1996).283.3 m (Mail & Guardian 1996) and 286 m (GUE 2002) are also published. | 来源存在冲突 | [4] [5] |
| A 2002 GUE team worked at depths between 30 m and 90 m in the upper chamber. | 信息可能已过时 | [1] |
| About 19 C in 1996 and 2002. | 信息可能已过时 | [4] [1] |
| Divers drop through a crack about 1.5 m by 3 m; the chamber opens quickly below, with brown mud on the walls and silt on the floor. | 已报告 | [1] [5] |
| The sinkhole is on a private game farm; no public procedure, fee or opening hours were found. | 已报告 | [1] [2] |
| The descent to the water is a steep scramble and moving dive equipment to the water's edge took about five hours in 2002; the nearest recompression chamber was then about seven hours away. | 信息可能已过时 | [1] |
已核实：来自我们直接查阅的官方或主要来源。已报告：仅来自二手来源。来源存在冲突：注释中列出两种版本。可能已过时：我们找到的最新来源已有一定年代。
由我们根据上述来源以自己的文字整理撰写。 提交更正