South Pacific examines the links between sonar, radar and ultrasound; technologies for making images from non-visual sources. Playing with relations between the visual, aural and textual, the work explores the Second World War’s legacy in the region. Reviving a technique of early experimental ultrasound, which required the patient be immersed in water, Brennan forms images exploring the interface between war, technology and perception. South Pacific recalls stories of tropical lagoons littered with rusting ordnance and coral islands flattened for runways. A vast ocean is glimpsed by radar, video and ultrasound.