(from Theory of the Dérive by Guy Debord)
In a dérive one or more persons during a certain period drops their relations, their work and leisure activities, and all their other usual motives for movement and action, and lets themselves be drawn by the attractions of the terrain and the encounters they find there.
The dérive includes both this letting-go and its necessary contradiction: the domination of psychogeographical variations by the knowledge and calculation of their possibilities.
The randomness of a dérive is fundamentally different from that of the stroll, but the first psychogeographical attractions discovered by dérivers may tend to fixate them around new habitual axes, to which they will constantly be drawn back.
One can dérive alone, but all indications are that the most fruitful numerical arrangement consists of several small groups of two or three people who have reached the same level of awareness, since cross-checking these different groups’ impressions makes it possible to arrive at more objective conclusions.
The average duration of a dérive is one day, considered as the time between two periods of sleep. The starting and ending times have no necessary relation to the solar day, but it should be noted that the last hours of the night are generally unsuitable for dérive.
The influence of weather on dérive, although real, is a significant factor only in the case of prolonged rains, which make them virtually impossible. But storms or other types of precipitation are rather favorable for dérives.
The spatial field of a dérive may be precisely delimited or vague, depending on whether the goal is to study a terrain or to emotionally disorient oneself.