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Diving Reels, Spools, & Dive Lines for Cave Diving

Human factors in diving equipment design - Wikipedia

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Why don't divers use rope when diving in unknown area? Such as when entering an unknown cave system that may have its own underground current that could drag them away. - Quora

What's it like to go cave diving, especially in uncharted territory? - Quora

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A Beginners Guide to Cavern and Cave Diving - Yacht Cruising Lifestyle