This is a highly insightful book, written with enviable clarity, and makes a considerable contribution to the literature on navigational issues generally and the precautionary principle specifically. It is a challenging and provocative text, shedding light on current decision-making processes in marine affairs and questioning the malleability of the law of the sea in responding to current and future threats from international shipping. - Richard Caddell, Swansea University, for Journal of the History of Collections, Vol. 26, no 2, July 2014Overall, the book presents an engaging and eloquent analysis. With its focus on the risks posed by HRV to the marine environment, the book undoubtedly addresses an important practical concern. In making the case for an increase in coastal States’ powers with regard to HRV based on the precautionary principle, the discussion expands its focus at times to provide context as to how the precautionary principle influences other marine sectors. As such, the book provides an insightful examination of the ways in which navigational regulations are infused with a precautionary rationale. - Aline Jaeckel, University of New South Wales, for The International Journal of Marine and Coastal Law (2015)