Laurie Taylor talks to Helen Sampson, Professor in the School of Social Sciences at Cardiff University, about her voyage into the lives and work of seafarers. 25 years of fieldwork on merchant cargo ships has given her an unusual insight into the changing realities of life onboard and the gap between romantic notions of sea travel and the harsher realities - from isolation from friends and family to the monotony of daily life, increasing regulation and surveillance. Also, Sara Caputo, Senior Research Fellow at Magdalene College, Cambridge, illuminates the way in which the history of mapping the oceans reflects the creation of the modern world as we know it, via centuries of trading, exploring and conquering. Producer: Jayne Egerton