DeepCave
The Journal
How Caves Actually Form: A Field Guide to Karst and Speleogenesis
Most of the world's great cave systems owe their existence to one unglamorous process: slightly acidic water slowly dissolving limestone over hundreds of thousands of years. Here's how it actually works.
Single Rope Technique: What It Is, and Why It's Never Learned From a Page
SRT is the technique that lets one caver descend and ascend a fixed rope independently. This is not a how-to — it's an explanation of what the technique is, why it exists, and why the only responsible next step is a club and an instructor, not a webpage.
Choosing and Running a Caving Headlamp: Lumens, Runtime, and Backups
A caving headlamp lives a harder life than any headlamp you've owned for hiking. Here's what actually matters when you're picking one, and why every serious caver carries a second light.
Layering for the Underground: Staying Warm (and Dry) on a Multi-Hour Trip
Caves sit at a near-constant temperature year-round, which sounds like it should make dressing easy — but activity level, water, and trip length change the real experience more than the thermometer does.
Reading a Cave Survey: Compass, Clino, and Tape, Explained
Every cave map starts as a string of raw numbers — a bearing, an angle, a length — read off three simple instruments, one leg at a time. Here's how those readings become a map.
Foul Air Underground: What Cavers Should Know About CO2 and Ventilation
Bad air is a real, if uncommon, caving hazard — and unlike a slippery ledge or a loose rock, it's completely invisible until it's already affecting you. Here's how it happens and how cavers manage the risk.
Planning Your First Caving Trip: A Practical Checklist
A good first caving trip is won or lost in the planning, days before anyone reaches the entrance. Here's what actually matters, from finding a group to leaving word behind.
Why Cave Rope Length Isn't Just Pitch Depth
It's tempting to measure a pitch and buy a rope that long. Here's the arithmetic behind why the rope you'd actually want to carry is meaningfully longer than the drop itself — worked with real numbers from the calculator.
Bad Air: Why It's Invisible, and Why You Leave
Elevated CO2 and low oxygen underground don't announce themselves the way a slippery ledge does. Here's the actual arithmetic behind a bad-air planning estimate, worked with real numbers — and why the honest answer is still always leave, not calculate your way to staying.
Headlamp Runtime, and Why You Carry Three Light Sources
Manufacturer runtime numbers rarely survive contact with a cold, hard-used caving trip. Here's the actual formula behind a real runtime estimate — worked for a primary, a backup, and a third light — and why serious cavers carry all three.
Layering for a Cold, Wet Cave: Working the Numbers
A mild, dry, active trip and a cold, wet, static one can call for wildly different clothing from the same wardrobe. Here's the actual arithmetic behind that gap, worked with the site's own layering calculator — as a clothing decision, not a medical one.
What Survey Grades Actually Mean
A cave survey's grade is a compact answer to "how much should I trust this." Here's what that trust is actually built on — worked through five real leg readings reduced with the site's own survey calculator.