The Cavern Experience
Eligible Open Water Divers can be safely toured using normal open water scuba
equipment if accompanied by an experienced and qualified Cavern Guide.
About your Guide:
Cavern Guides are certified Full Cave Divers who are also Open Water Dive Masters
or higher. These qualified professionals must be outfitted with complete Full Cave
Diving Equipment, Oxygen / First Aid, have successfully completed a "Cavern Guide
Program" and display authorized identification.
Safety limitations Divers must always
- Within the natural Day Light Zone of the surface open water pools.
- A maximum distance of 200 feet (60 meters) from the surface.
- No deeper than 70 feet (21 meters).
- Minimum visibility 50 feet (15 meters).
- In large passages where at least 3 divers can easily swim side by side.
- Air management using rule of thirds.
- Within No Decompression limits.
- Following a guideline.
- At a ratio of No more than 4 participants per Cavern Guide
The golden rule of overhead environment diving is:
ANY DIVER CAN CALL THE DIVE AT ANY TIME, FOR ANY REASON.
- Training: This Cavern Tour is NOT a certifying program. After completion of
this Experience, divers may enroll in a Cavern Diver Course. Otherwise, all divers
MUST be accompanied at all times by a Cavern Guide in this potentially dangerous
- Guideline: During the tour all divers must follow and stay within Arms Length
of a guideline that will lead back to the open water.
- Lights: All participants must carry at least 1 underwater diving light and keep
one turned on at all times.
- Air Supply: Participants must exit the overhead environment with no less than
900 psi (70 bar) in an 80 cubic foot (11 liter) dive cylinder utilizing the Rule of
- Depth: The Cavern Tour must never exceed a maximum depth of 70 feet (21
- No Dangles: Submersible Pressure Gauges, Octopus Regulators, Cameras etc. must
be secured and in an accessible manner that does not allow them to hang
- No Snorkels: The use of a snorkel is considered inappropriate for Cavern Diving
and is not required.
- No Big Knife: In the unlikely event that a diver was to become entangled in the
Guideline, your Cavern Guide is equipped with all the necessary tools and training
to assist you and ensure your safety at all times.
- Less Weight: Because you will be diving in fresh water, less weight than diving
in the Ocean is required. A pre-dive weighting check is performed prior to
descending into the Cavern.
- No Gloves: In the event of poor visibility, line following is made easier
- All normal Open Water hand signals apply in addition to Light signals.
- OK Stop / Hold
- Attention Distress
- Silt Guideline
- Turn around Exit the cavern
- Neutral buoyancy * Trim
- Finning Techniques (silt) * Halocline
Leave only Bubbles, Kill only Time, Take only Memories.
Please avoid the use of tanning oils or bug repellant as they damage the cenote's
ecosystem. These Caverns are a very unique, fragile and an Un-repairable
Environment. Please do not touch formations or disturb the silt on the floor. They
may also contain artifacts from past Maya civilizations. Please, No Graffiti,
handprints, or removal of any objects from the Caverns.
Before Each Dive
Your Cavern Guide will conduct a thorough briefing containing:
- Site orientation.
- Entry and Exit procedures.
- Maximum Depth and Time.
- Air Supply / Turn Pressures.
- Buoyancy Check to ensure proper weighting.
- Emergency Procedures.
- Diving Procedures.
- Course to follow.