AAS dérives are periods of drifting, usually in an urban environment, during which time the group is in a heightened state of situational and environmental awareness. Dérives can last for several hours or several days. They can involve continuous walking or use of public transport. Dérives can also be static. The practice of urban drifting is a Situationist practice and can be used to develop a group psychosis/mythos or to explore and map a specified geographical area. AAS dérives may be projects in themselves or part of the ongoing development of AAS molecular collaboration as a work in itself.