http://www.pircenter.org/en/news/6973-1224507
https://www.geostrategy.org.uk/britains-world/unseen-but-vital-britain-and-undersea-security/?utm_source=newsletter&utm_medium=email&utm_campaign=09%2F03%2F2023
https://fsd.ch/wp-content/uploads/2025/06/EN-FSD-Annual-REPORT-2024.pdf
https://www.eeas.europa.eu/sites/default/files/documents/strategic_compass_en3_web.pdf