Dean's Blue Hole
A beach-side blue hole on Long Island, about 202 m deep, with a narrow neck opening into a vast chamber. It is used mainly for freediving and snorkelling.
The hole is entered from a sandy beach in a sheltered bay. Its rim ledges and the coral-covered sides of the entrance hold reef fish, and a school of tarpon is reported to hang at about 20 m. Below the neck, the walls open out into a very large chamber.
The site is the venue of the Vertical Blue freediving competition. No land-manager rules for scuba or cave diving are published.
环境
Open, sheltered blue hole: surface opening about 45 x 55 m, ledges at 10-15 m, then a chamber at least 100 m across descending to about 202 m.
环境条件
The freediving organiser reports no current or waves inside the hole and visibility of about 10 to 50 m (typical).
典型范围来自已发表资料，不代表当前实际状况。
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 (6)
| 信息条目 | 状态 | 来源 |
|---|---|---|
| The hole is about 663 ft (202 m) deep.Vertical Blue gives 203 m. | 已报告 | [1] [2] |
| The opening is about 45 x 55 m, narrowing to about 25 x 35 m with ledges at 10-15 m, above a cavern at least 100 m across. | 已报告 | [2] |
| A resident school of tarpon is found at about 20 m. | 已报告 | [2] |
| Visibility is about 10 to 50 m.Typical, not current. | 已报告 | [2] |
| The hole is reached by a rocky pathway from the surrounding beach. | 已核实 | [1] |
| Coordinates are for Clarence Town (GeoNames), the settlement where the hole is located.Area-level. | 已报告 | [3] |
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