FPRI – Atlantic Bastion represents the Royal Navy’s future plan for anti-submarine capabilities, defending the North Atlantic against the threat from the Russian submarine fleet. First formally revealed in the United Kingdom’s recent Strategic Defence Review, the program brings in emerging technologies to achieve persistent situational awareness in what is an extremely complex maritime domain. While the Russian threat in the North Atlantic is persistent and tackling it requires innovative thinking, a successful Atlantic Bastion will require the solution of a range of technological challenges and the answering of questions that have not yet been resolved in the brief plans that have emerged.