In this evidence, I explain how the UK's economic security depends on freedom of navigation and the global maritime supply chain as well as on maritime infrastructure, and what the threats are. Addressing challenges to the maritime dimension of the UK’s economic security requires: a) Devoting enough resources to the Royal Navy; b) Fostering maritime cooperation with like-minded states; c) Capitalizing on the UK’s dual scientific and maritime power to foster science-security innovation and strengthen Western leadership of the maritime corporate sector.