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The inundation of a disputed island in the Bay of Bengal in March 2010 was reported as an unlooked for benefit of climate change, eliminating the object of a contentious bilateral dispute. In fact this has not proved to be the case and the incident instead highlights the vulnerability of certain low-lying coastlines and insular features to significant and rapid changes in location, whether caused by sea level rise or not. While acknowledging ongoing debates on climate change and sea level rise, the paper examines key challenges in this context, notably concerning the ambulatory nature of normal baselines and the consequent potential impacts on the location of maritime jurisdictional limits derived from them. The paper goes on to suggest that the impacts of sea level rise on coasts and maritime claims will be unevenly felt before briefly outlining potential options with respect to retaining or securing maritime jurisdictional entitlements.