Every minute, a character can climb a distance in metres equal to the results of a dice roll using his/her CO + Climbing (including Climbing speed specialism). If the dice roll result is zero or less, the character does not make any progress that minute.
For example, Urlik is a good climber with a Climbing skill score of 3 and a CO score of +1, and he is lightly encumbered (carrying approximately his encumbrance limit x 0.6 kg, giving +1 bonus to dice rolls based on CO). His basic value for climbing speed is 5 (3+1+1), giving him a certain climbing speed of 5 metres per minute (or more if he chooses to risk it).
A character can choose to climb more slowly than the dice roll result. For each metre of speed sacrificed, the character gains a +1/2 modifier to his/her Climbing safely dice roll (see Climbing safely).