On the night of October 13th to 14th, 1939, the German U-Boat U-47 carried out one of the boldest attacks in the history of submarine warfare. It slipped through the defenses of Scapa Flow, the main British naval base, and sank the battleship HMS Royal Oak. 833 sailors died, including a hundred boys under the age of eighteen. This tragedy exposed the weaknesses of British defenses and became a symbol of the ruthlessness of the new war.
The Fortress That Was an Illusion
Scapa Flow in the Orkneys was considered the safest place for the British fleet. The natural harbor, surrounded by islands and with narrow straits easy to block, seemed impenetrable to enemy submarines. The Admiralty was so confident in its security that HMS Royal Oak was anchored there carelessly, with open portholes and a sleeping crew.
Meanwhile, Karl Dönitz, commander of the German submarine forces, had planned a strike at the heart of the Royal Navy since the first days of the war. Aerial reconnaissance and agents identified a weak spot in the defenses of the eastern Kirk Sound. Dönitz assigned the mission to one of his most capable commanders, thirty-one-year-old Günther Prien. On October 8th, U-47 left Kiel for the North Sea, carrying a plan that seemed pure madness.
Prien maneuvered on the surface among sunken wrecks blocking the strait. The currents were strong, and the margin for error was minimal. Each meter risked collision with an obstacle or detection by a patrol. Nevertheless, U-47 slipped through Kirk Sound and found itself in the heart of the British fortress—unseen and deadly.
Thirteen Minutes to Disaster
At 12:58 a.m., Prien fired the first salvo of four torpedoes. Three missed or failed to detonate, but one struck the bow of Royal Oak. The explosion awoke Royal Marine Horace Baber, but a false alarm was soon declared on board. Someone decided it was probably an explosion in the flammable materials magazine. Baber went back to sleep, and paymaster officer Eardley Maclean went to inspect the magazines.
This proved to be a fatal mistake. At 1:16 a.m., Prien fired three more torpedoes, and all hit their mark. A series of explosions tore through the battleship, ripping open its steel hull and letting water flood inside. The ship immediately listed fifteen degrees to starboard, and the open portholes dropped below the waterline.
Baber awoke in hell. Flames engulfed the marines’ mess, and he was thrown by the blast. Together with three companions, he tried to escape through locked armored doors as water poured in through the portholes. They beat on the steel with their fists and tools until people on the other side opened the doors just enough for them to squeeze through. The queue for the ladder to the upper deck seemed endless.
Chaos in Icy Waters
When Baber finally reached the upper deck, he was met with total chaos. The ship continued to list, and sailors leapt into the icy oil-slicked sea. Baber judged that the shore was too far and decided to tread water in place, waiting for rescue. He turned to look at his home for the past months: a mass of twisted decks and steel sheets leaning toward the water, as he later wrote, the waves seemed to hungrily devour their prey.
Officer Maclean was both luckier and unluckier. He managed to slide down the side into a lifeboat, which quickly began picking survivors from the water. The problem was the boat was overcrowded, and dozens more sailors clung to its sides, teeth chattering with cold. The boat capsized once, then a second time, throwing everyone back into the sea.
Maclean swallowed oil spilling from the sinking ship. The rest of his time in the water was a nightmare, as he would later recall. He felt he spent over an hour struggling for every breath. When finally pulled aboard HMS Pegasus, he was too cold to do anything but shiver. He was offered brandy, which he didn’t drink, a hot bath, and a blanket.
The Cost of a Single Night
At 1:29 a.m., just thirteen minutes after Prien’s second attack, HMS Royal Oak vanished below the waves. Of more than 1,200 sailors, about 450 survived. Among the 833 victims were one hundred boys under eighteen, undergoing training with the Royal Navy. Rear Admiral Henry Blagrove also died; according to witnesses, he helped in the crew’s evacuation until the end rather than saving himself.
The loss of the ship alone was not a strategic disaster. Royal Oak was an obsolete veteran of World War I, and Britain held a decisive edge in battleships. The true blow was psychological: the main fleet base, a symbol of British naval power, turned out to be vulnerable. If a U-Boat could slip into Scapa Flow, where else could German torpedoes reach?
Günther Prien returned to Germany as a hero. Hitler personally awarded him the Knight’s Cross of the Iron Cross, making him the first Kriegsmarine officer to receive the honor. Nazi propaganda presented him as the embodiment of German courage and ingenuity. For the British, the attack was a painful reminder that this war would be different and no fortress was truly safe.
Today, the wreck of HMS Royal Oak rests upside down at a depth of thirty meters in the waters of Scapa Flow. It is officially recognized as a war grave, and diving near it without special permission is strictly forbidden. Every year, on the anniversary of the sinking, Royal Navy divers place a British ensign on the stern of the wreck, paying tribute to those who remain in their steel sarcophagus.
Autor
Marcus Renfell
Marcus Renfell is a historian driven by curiosity and passion. He refuses to accept the “safe,” polished versions of the past. Instead, he brings forgotten, overlooked, and distorted stories back to life. His work blends scholarly precision with the art of storytelling, turning historical narratives into vivid, page-turning experiences.
His mission is simple: to prove that history can be gripping, alive, and deeply personal.
His debut book: Women of Science. Stories You Were Never Told
In his first publication, Marcus Renfell shines a light on the remarkable women who shaped the world of science — both the pioneers whose names we know and the brilliant minds history forgot. It’s an inspiring journey through untold stories, groundbreaking achievements, and the resilience of women who changed our understanding of the world.
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