The latest Robots podcast interviews dive into the world of autonomous underwater vehicles (AUVs). Navinda Kottege at the Robotic Systems Group of the Australian National University has been looking at how swarms of Serafina AUVs can determine their range, bearing and posture with respect to neighboring robots. Marc Sherman from Teledyne RD Instruments tells us how his Doppler Velocity Log systems are used to provide positioning for AUVs. Also in this episode, and in a first for our podcast, Robots features a short story by science fiction author Jack Graham. The "Selkies" will be following us over the next four episodes, so don't miss today's debut.