Significance of Sea Power
Good afternoon, ladies and gentlemen. Thank you for your presence today, and my sincere gratitude goes to the Department for Naval Research for orchestrating this symposium.
As we converge at Admiralty House, the criticality of sea power is undoubtedly apparent to all of you. Our history has been immensely influenced by the sea, shaping our prosperity, security, and global influence over centuries. Our ability to navigate, safeguard maritime routes, and deny adversaries the advantages of the ocean has been paramount.
The focal point of my address today revolves around the Atlantic Ocean. This isn’t merely a vast expanse or a stage for historical conflicts, but rather a fundamental pillar of Britain’s security.
The Atlantic Campaign of World War II
Eight decades ago, Britain and her allies engaged in the protracted naval campaign of the Second World War, fought at sea. This struggle was sustained by sailors, merchant mariners, aircrew, dockyard workers, engineers, scientists, and codebreakers—by men and women who kept Britain afloat as Europe succumbed to Nazi domination.
Throughout this ordeal, convoys traversed a perilous ocean, facing inclement weather, air assaults, and the persistent threat of U-boats. These convoys transported essential supplies—food, fuel, raw materials, weaponry, and reinforcements—critical to our national survival.
In 1941, Winston Churchill aptly characterised this relentless struggle as the Battle of the Atlantic. It was the potential loss of this battle that truly alarmed him, rather than the Blitz or the threats posed to the Empire in the East. As he reflected in his memoirs, Britain’s capability to “carry on the war, or even keep ourselves alive,” fundamentally relied on our control over ocean routes and the unrestricted access to our ports.
The Existential Nature of the Sea
Churchill recognised an essential truth: the sea is not an afterthought for Britain; it is integral to our existence. Had those vital maritime arteries been severed during the war, had Britain lost the Atlantic, our lifeline would have been extinguished. We would have found it hard to persevere until American forces joined the conflict, and the liberation of Europe would have been rendered impossible.
This does not diminish the invaluable contributions of our other military services, which played a crucial role in the war effort. Just yesterday, we commemorated the 86th anniversary of the Battle of Britain, a campaign that thwarted the Luftwaffe’s bid for air superiority and was equally vital to our survival.
As the son of an RAF crypto mechanic, I recognise the enduring significance of air power to our nation. However, the crux of my argument is this: without the Royal Navy and the RAF, one could speculate whether Hitler would have abandoned Operation Sealion to concentrate on invading Russia. It raises questions about whether the Army would have been capable of campaigning in North Africa, the Mediterranean, or in mainland Europe. Sea power not only sustained us during the War; it arguably saved us. Lose the war at sea, and you lose the war—a warning from Admiral Pound, the First Sea Lord of the time, which remains relevant today.
Maritime Readiness in a Changing World
If we are to succeed in the Atlantic once more, we must reinforce our warfighting readiness and rediscover our identity as a maritime nation. This call to action is not due to a perfect repetition of history. Indeed, history does not repeat itself. However, the elements that rendered the Atlantic critical eighty years ago still hold significance today.
The world may have transformed dramatically, yet our reliance on the Atlantic has only intensified. Almost all our trade traverses the sea, with America standing as our most significant trading ally. The majority of our energy, food, raw materials, and exports flow through maritime channels. Beneath the waves, our nuclear deterrent ensures national security, while undersea cables facilitate nearly all data, transactions, and communications essential to modern existence.
During the war, the British populace grasped that a submarine assault on an allied convoy, hundreds of miles away, had immediate repercussions at home. Today, however, we find ourselves in a precarious paradox. The Atlantic, arguably more crucial than ever, has become increasingly obscure in the public consciousness. Supermarkets are stocked, homes are heated, finances move instantly, and the internet propels our modern lives, creating an illusion of effortless progress.
Understanding Our Maritime Dependence
This progress, however, has not been effortless; it has been hard-won and consistently defended. If this defence falters, the repercussions will resonate across every household, every business, and every governmental department. Our adversaries are acutely aware of our reliance on the sea and seabed. They recognise that the Atlantic is not simply an empty expanse but strategic territory—an essential conduit linking North America and Europe with the rest of the world. It is the route through which NATO reinforcements would travel and the space sustaining our trade, energy, data, and deterrence.
The lessons from the War maintain their importance. In the 1940s, the question was whether Britain could remain connected to the industrial, economic, and military strength of North America and its Empire. Today, in an era defined by missiles, cyber warfare, and rapid technological advances, we face additional challenges, as the seabed emerges as a new theatre of contest.
Modern Warfare and the Need for Adaptation
Uncrewed systems are transforming our combat approach, advancing at a pace that many nations struggle to match. Information flows faster than ever before, yet many foundational aspects remain unchanged. The Atlantic remains the same body of water; we continue to be an island nation reliant on it for the transport of goods, fuel, and commodities. Our most significant alliances are still transatlantic.
This issue transcends military uniform; the Atlantic poses a military, industrial, diplomatic, and economic challenge—and an opportunity. A collective national effort is essential if we are to protect it. History illustrates that the original Battle of the Atlantic was not won through a single decisive action but by cumulative advantages: superior intelligence, accelerated shipbuilding, refined tactics, effective air cover, convoy discipline, and the willingness to learn under pressure.
Lessons from the Past and Future Strategies
Leadership, the spirit to fight, and the desire to win were vital to victory then, and the same resolve is necessary today—albeit with different tools in a new context. We must avoid letting the intricacies of modern technology obscure our imperative: to monitor the Atlantic, safeguard vital assets, maintain open sea lanes, and dissuade any adversary from believing that the cost of coercion or aggression would be outweighed by potential gains. This is the measure of our warfighting readiness.
Can we engage in combat tonight? Can we sustain the fight tomorrow? Can we adapt more swiftly than our adversaries? This is the standard against which the Navy must be evaluated. The Battle of the Atlantic also imparted another enduring lesson: there is only one scenario worse than fighting alongside allies, and that is fighting without them. No nation secured the Atlantic alone in the 1940s, and today’s circumstances are no different.
The Importance of Allied Integration
Victory relied on Allied integration—navies, merchant fleets, air forces, intelligence, scientists, and industries united for a common purpose. This principle remains the foundation of NATO today. In any significant crisis, NATO’s capacity to reinforce Europe hinges on secure access across the Atlantic, central to our collective defence.
Thus, the Royal Navy’s role in the Atlantic is inextricably linked to NATO’s broader mission. Our responsibilities include contributing to collective deterrence, facilitating the movement of Allied forces, safeguarding critical infrastructure, maintaining situational awareness, and ensuring freedom of manoeuvre. This is why partnerships are indispensable—whether through NATO, bilateral relationships, or the Joint Expeditionary Force (JEF). Our security is fortified when we operate alongside allies who share our values and interests.
Strengthening Maritime Alliances
For the United Kingdom, this represents both an obligation and an opportunity. As a nuclear power, a permanent member of the United Nations Security Council, a founding member of NATO, and the framework nation for the JEF, we maintain one of the world’s most formidable navies. Our geography, history, and alliances afford us a distinct stake in the North Atlantic and the capability to act collaboratively on a large scale.
This brings us to the third lesson from the War: the significance of our northern flank. The Atlantic cannot be comprehended without considering the High North, as control of the ocean has always been closely tied to the dominance of its northern approaches. The ramifications of losing control were painfully evident in 1940 when the defeat of Norway allowed the Nazis to seize the coastline and deep-water fjords, threatening Allied shipping lanes in the Atlantic.
Securing the Northern Approaches
Later, the Greenland-Iceland-UK Gap became critical during the Cold War, and its relevance endures today. The Norwegian Sea, the Arctic, and the northern approaches are not remote theatres; they form our maritime border with Russia and are where British security, NATO, and European stability converge. The JEF plays an increasingly vital role