Exuma
Mosstown Blue Holes (Great Exuma)
Info · exploration
Information only: explored on expeditions (Advanced Diver Magazine). We found no dive centre that dives here.
- Max depth68 m (223 ft)
- CertificationFull cave
- SpecialExperienced divers
Diving and fills
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Now at Mosstown Blue Holes (Great Exuma)
The dive
Near Mosstown lie large inland mangrove swamps, cut off from the sea by tall hills. Yet the water rises and falls strongly with the tide: they must be connected to the ocean by underground rivers.
Profile and sections
Near Mosstown lie large inland mangrove swamps, cut off from the sea by tall hills. Yet the water rises and falls strongly with the tide: they must be connected to the ocean by underground rivers. On the shore lies Mosstown Blue Hole, where a steeply sloping passage drops through layered limestone into a large river tunnel.
Dr. Thomas Iliffe and Brian Kakuk found that blue hole on an earlier expedition, and Kakuk made a couple of exploratory dives. On the expedition with Advanced Diver Magazine an elderly resident showed the team two more spots. Crystal, named by locals for its cobalt-blue water, turned out to be a tight breakdown that pinched off. In the main channel two holes lie ~18 m (60 ft) apart, both pumping large amounts of water into the swamp; the team named them Mosstown Twins. Brett Hemphill made the first dives in both: in the second hole, with a larger tunnel and more flow, his line ran out and he had to turn, on the expedition's last day.
Practical: only expedition dives are described; no dive centre found that dives here.
- Depth and profile
- Mosstown Twins, hole one: at 45° to a flat bedding plane 35 cm high and ~8 m wide (14 in × 25 ft) at 68 m (222 ft) · Mosstown Blue Hole: steep passage to a large river tunnel at 67 m (220 ft) · Crystal: tight breakdown to 31 m (102 ft) · Twins, hole two: line ran out at 21 m (70 ft), passage continues (Advanced Diver Magazine)
- Configuration
- Crystal is a tight sidemount breakdown along the ceiling; beyond 31 m only without cylinders mounted. For the deep holes trimix (estimate).
- Gas
- Trimix from 45 m (148 ft)
Who can dive where
- At least Full cave
- Configurations: Backmount / twinset / Sidemount / CCR / Small cylinders / no-mount (speleo sumps)
- Configuration unknown — research beforehand
- Goes down to 68 m (trimix or deco may be needed)
- Experienced divers only
This is how the planner decides who in your team may dive this cave. Rules your own trip adds (organizer, a mail, the AI) show with your trip.
How to get there
Inland blue holes in the mangrove swamps by the village of Mosstown on Great Exuma: Mosstown Blue Hole on the swamp's shore, Crystal down a small dirt road at its edge, and the Mosstown Twins in the swamp's main channel, close to the bank. The team found them with the help of an elderly resident; rough limestone, thick mangrove and poisonwood (Advanced Diver Magazine).
Around Mosstown Blue Holes (Great Exuma)
FillsNo fill station known nearby
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