You will need to take a scuba dive course if you plan on becoming a cavern divers. The course includes four dives. The first is an outdoor practice, in which you will learn how to handle line and reel, avoid silt-outs and manage air. Your instructor will help you plan your dive and maintain your control over your orientation and air flow. Upon completion of the course, you will be able to dive in caves or other caves with safety rules.
Safety
Cave diving safety protocols follow the Rule of Threes. A cave diver must have three sources of light and at least two tanks, one of which should be independent or multi-mounted. They should also divide their gas into three separate sections to ensure that they have enough gas to survive the dive. If the dive team has experience in diving in caves, a more conservative gas management plan will be preferred. Cave divers should not only avoid cave hazards but also practice safe diving practices.
Equipment
Cave diving requires special equipment. It is important to carry two types of safety reels. One should be used to run guideline, while the other should be used to maintain line tension while the diver is in the cave. Each diver should have a safety reel that has enough line to reach the cave's entry and the longest permanent line. When purchasing a new reel, most manufacturers will pack the spools to the edge with guideline, which makes them more prone to jam. You should trim about 10 meters (30 feet) of your line before you use it to avoid jamming.
Maximum penetration
TDI offers a cavern divers course. This course is for scuba divers who desire to dive in areas without direct vertical access. This includes diving in caverns and underhangs. This course is not required to be able to dive in caverns, but it will teach you the skills necessary to make the most out of these environments. This course will teach you how to navigate the narrow spaces often hidden from your view.
Maximum depth
Cavern diving comes with its own limitations. You must never dive at night, and be aware of your limits. Cavern diving requires more advanced training that other types of diving. If you're curious about diving in caverns, you'll need to learn the basic cave safety procedures and know your limits. Before you can dive in caverns, it is important to have some cave diving experience. This will allow you to begin your journey into the wonderful world of cavern-diving!