A scuba diving course is required if you want to become a cavern diver. This course includes four scuba dives: the first is an outdoor practice dive, where you will learn the basic techniques of handling line and reel, avoiding silt-outs, and air management. Your instructor can also help you plan your dives and manage your orientation. You will be able, upon completion, to dive in caves or other caves that follow safety rules.
Safety
Cave diving safety protocols follow the Rule of Threes. The cave diver should have three types of light sources and at least two tanks. The gas should be divided into three different sections so that they can survive the dive. If the dive team has previous experience with cave diving, a more conservative approach to gas management is recommended. In addition to avoiding cave hazards, cave divers should practice safe diving practices.
Equipment
Cave diving requires the use of specific equipment. Two safety reels should be carried. One safety reel should be used to run the guideline while the other should maintain the line tension 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. Many manufacturers will bundle the spools with guideline at the edge when you purchase a new reel. This makes them more likely to jam. To avoid jamming, remove approximately 10 meters (30ft), of line prior to use.
Maximum penetration
TDI offers a cavern dive course designed for scuba divers that wish to dive in areas with limited vertical access. This includes dives into caverns, and overhangs. While it is not a prerequisite to enroll in a cavern dive, this course will help you gain the necessary skills to make the best use of this environment. You will learn to navigate the often-hidden spaces safely.
Maximum depth
Cavern diving is subject to certain restrictions. You must never dive at night, and be aware of your limits. Cavern diving is more difficult than other types of diving. You will need to be familiar with cave safety procedures and your limits if you are interested in diving in caverns. You should also have some cave diving experience before you try it. This will allow you to begin your journey into the wonderful world of cavern-diving!