ABSTRACT
For scuba divers, underwater navigation is a practice of some significance, especially on boat dives. The briefing may also be done with only a verbal orientation, accompained by various hand gestures. Navigating according to physical features is itself made more complex by the variability of the environment and visibility. While researchers in the fields of extended and distributed cognition rarely, if ever, connect their work to posthumanist thought, this chapter argues that to understand language and cognition as distributed in divers' surroundings helps them decentralize the human brain in processes of thought. The chapter shows how the cognitive processes involved in diving navigation engage mental, bodily and material practices. The notion of repertoire has been used in numerous ways, re-emerging most recently as part of "post-Fishmanian" sociolinguistics, a desire to move away from the sedimented terminology of bilingualism and code-mixing towards a more flexible account of how people deploy different linguistic resources in their everyday practice.
