Cavern Diver.
The natural light zone — and how to behave in it. The prerequisite for every cave course that follows.
What this
course is.
Cavern is not cave — and that distinction is exactly what this course teaches. You stay within sight of natural daylight, on the line, with strict gas turns and a discipline that is honest about the overhead above you. By the end you can dive a cavern environment safely, and you understand exactly which line in the sand separates cavern from cave.
Honest about
the cohort.
- Divers with good buoyancy who want a first, controlled exposure to the overhead.
- Anyone planning to progress to Intro to Cave at Cueva del Agua.
- Recreational tech divers wanting the cavern qualification as a stand-alone discipline.
Drilled until
it's boring.
Skills are not a list to tick — they are habits to build. We drill them on land, drill them in the shallows, then take them into the dive.
The light-zone rule
What it is, why it matters, when to call the dive.
Line awareness
Primary tie-off, anti-silting line discipline, follow / lead.
Anti-silt techniques
Frog kick, helicopter, reverse. No flutter kicks ever again.
Gas thirds & turns
Turn the dive on a third. No exceptions. No bargaining.
Lost-line drills
What to do when you cannot see your line. Slow, methodical, calm.
Light protocol
Primary, backup, signals. Three lights. Always.
The shape
of the week.
Before
you book.
- Advanced Open Water
- 25 logged dives with documented good buoyancy
- Minimum age 18
- Compulsory check dive with the instructor before the course starts
In the
course price.
- Cavern access at Cueva del Agua
- In-water training and skills sessions
- Reel, primary line, course manual
- Personal sign-off — no group passes
Plan
for these.
- Certification fee
- Gas (cost)
- Personal kit (twinset/sidemount as configured)
- Insurance
Where this
takes you next.
Tech and cave are a ladder, not a catalogue. Here are the next rungs from this course.
Intro to Cave Diver
Past the daylight. On the line. In a strict team.
View course → Or stay techDecompression Procedures
If you want the gate course of staged decompression next.
View course → Combined valueAdv Nitrox + Deco · Combined
Tech bundle if you do not yet have the deco foundation.
View course →Make contact.
Send a short message with your goals and certification history. We reply within twenty-four hours and answer every question before you commit.