Cave system diving (overhead environment)

Cave system diving occurs in underwater passages where you cannot swim straight up to reach the air. This environment creates an overhead ceiling. You might encounter these settings in limestone formations or sunken wreck structures. Divers often face narrow gaps or silty floors during these dives. Most recreational divers avoid these areas because they lack the necessary technical certification. In places like Anilao, some small crevices act as entry points for advanced training. Always check your gas math before entering a ceiling. A common mistake is failing to manage silt levels while swimming near the bottom. One wrong kick can ruin visibility for everyone in the group. Stay close to your guide.