The journeys of people who have been forced to leave their homes have, over centuries, included travel across water, including rivers, oceans, and seas. This post presents a new approach to researching refugee boat journeys by sea, based on a collaboration between historians and ocean engineers. We have used oral history research with survivors of a particular boat, rescued off Vietnam in June 1982, alongside numerical modelling so that the sea state the boat travelled through and the specific movement of the boat in those conditions could be determined. The scientific analysis explains how the ocean and weather, paradoxically, both created the conditions that were dangerous for this vessel, but also placed it in a position where it was rescued.