Why isn’t there one. This seems like the perfect subject to include in a merit badge. Our troop just spent a weekend camping in the Morengo Cave in Indiana and can tell you it was a great experience watching these young men stretch and learn about cave preservation and exploration. They completed a 3 mile cave hike which included several “crawls” most interesting was a crawl called the “Masher”. They then spent the night in absolute darkness in the cave which was as much of a learning opportunity as the crawls. Few people have ever experienced absolute darkness, absolute silence with no air movement and can be very disorienting.
Ps: the kids did better than this grown man!