Do you know what the difference between exploration as a scuba diver vs. exploration as a free diver?
Christian Redl holds multiple world records in free diving. In this video clip he explains or says that the difference between exploration as as a scuba diver vs a free diver is: When you go scuba diving, you go to explore the environment. However, when you go free diving, you go to explore yourself.
Christian actually free dives ( no tanks, just air in his lungs) in caves and mines and explains the challenge of successfully navigating to the next air hole without running out of oxygen. getting to the next air hole.
Watch the following video of him free diving an old mine in Budapest with a DPV.