Caving
General proficiency — see Proficiencies for the rules and the Proficiency Index for the full list.
The character has learned to keep a map in his head of where he is when exploring underground caves, cavern complexes, and rivers. He is able to accurately estimate length, width, and depth when he travels with almost no error. On a proficiency throw of 11+, the character with this proficiency will be able to automatically know the route he has taken to get where he is, if he was conscious at the time.