天坑
Friedman Sink
Full cave certification required: Florida State Parks diving rules [1] (Maximum four cave divers at one time.). 以下分类采用该认证体系自身的命名方式，用于描述该潜点所需的培训级别。
A sinkhole entrance to the Manatee Springs cave system that Florida State Parks restricts to divers with full cave certification, with no more than four in the water at once.
Friedman Sink is the most restricted of the three diving entrances at Manatee Springs State Park. Florida State Parks requires full cave certification to enter here and caps the number of cave divers at four at any one time.
The park gives no published depth or description of the sink itself, so divers should ask at the ranger station when registering.
环境
A sinkhole entrance to the Manatee cave system; no published measurements.
通往该地点的其他入口 Manatee Springs cave system
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 (5)
| 信息条目 | 状态 | 来源 |
|---|---|---|
| The Friedman Sink entrance requires full cave certification, and up to four cave divers may be at Friedman at one time. | 已核实 | [1] |
| Divers must register with their certification card, dive in parties of at least two and stay within their certification. | 已核实 | [1] |
| Admission is $6 per vehicle and diving is free with regular admission.Read 2026-10-14. | 已核实 | [2] |
| The park opens at 8 a.m. and divers must be out one hour before sunset. | 已核实 | [2] |
| Diving is first-come, first-served with no reservations or holding spots, and all members of a party must be present at registration. | 已核实 | [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