The skill system contains a number of quirks and odd features; for example, some skills are used in unexpected ways, such as the skill "adventuring.movement.climbing.rock", which, while it is used for climbing rocks, is typically used to climb virtually any surface which isn't a tree or rope, such as a metal drainpipe. Because of the wide range of uses that skills are put to, individual skills are not documented, so working out what skill you need to perform a given task can sometimes be challenging — for example, the skill "adventuring.direction", typically used to avoid getting lost in extreme circumstances, is also the skill used in both reading and crafting maps.