INTRODUCTION: WHY THE SEA MATTERS In nuclear warfare, power hinges not only on the number of weapons that a state possesses, but also their ability to survive enemy attacks and remain effective for counterstrikes. This is where the ocean assumes a decisive role; unlike land-based missile-silos, which can be mapped and targeted, or aircraft’s dependence on vulnerable, visible bases, a nuclear-armed submarine — almost indefinitely concealed and mobile beneath thousands of metre