Category
Survey & Navigation
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.
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.