How the Zeebrugge Mole Was Built and Why It Mattered
How German Forces Transformed the Mole Into a Naval Stronghold
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| Foreshortened View of the Mole after the Zeebrugge Raid |
Old historical photographs of World War 1, air pilots, motorbikes and air balloons of British History.
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| Foreshortened View of the Mole after the Zeebrugge Raid |
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| Roger Keyes Public domain photo (The Seafarers) Arthur Corbett Smith |
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Take a look at this rare photograph. This striking view captures a German coastal gun emplacement placed on the Zeebrugge Mole around 1918, during the Zeebrugge Raid. The image offers a rare, ground‑level view from within the shelter, looking outward toward the coast. Coastal defence photographs from this angle are rare, making this image a valuable piece of visual evidence from the final year of the First World War.
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| German Gun Emplacement Looking out from the Mole Coast |
The photograph shows the gun resting staunchly on its concrete mounting block, a feature of German coastal fortifications designed to absorb recoil and stabilise artillery. From this sheltered position, the weapon would have been protected from the elements and partially shielded from enemy fire.
To the right of the frame, a set of concrete steps leads up to the strongroom door — a reinforced storage space where ammunition, tools and essential equipment were kept. These strongrooms were vital for maintaining the gun’s readiness, especially during periods of heavy naval activity.
Ahead of the emplacement lies the Zeebrugge Mole, a massive breakwater structure that played a crucial role in German naval operations. The Mole served as a protective barrier for U‑boats and destroyers operating from the nearby harbour, making it a key target during the British raid on St George’s Day, 23 April 1918.
The Mole was heavily fortified with gun positions, searchlights, machine‑gun nests and observation posts. This photograph captures one of the many defensive structures that made the Mole such a formidable obstacle for the attacking forces.
The Zeebrugge Raid aimed to block the harbour entrance by sinking obsolete ships — known as blockships — to stop German U‑boats from entering the Channel. Coastal guns like the one shown in this photograph were part of the defensive network that responded to the British assault.
Although the raid did not fully achieve its long‑term goal, it remains one of the most daring naval operations of the war. Images like this help illustrate the environment the raiding forces faced: reinforced concrete, elevated gun positions and well‑protected shelters designed to withstand bombardment.
This rare photograph captures a group of German naval officers standing on the deck of a submarine at Ostend in 1918, during the final year of the First World War. Ostend, along with nearby Zeebrugge, was a crucial base for German U‑boat operations in the English Channel and the North Sea.
Images of submarines from this period are uncommon, making this photograph a valuable glimpse into the daily routines and working conditions of the Imperial German Navy.
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| German Submarine with Navy Crewmen on Deck, Ostend, 1918 |
By 1918, German submarines — or U‑boats — had become one of the most feared weapons of the war. Their ability to strike unseen beneath the waves changed naval warfare forever. This photograph shows the submarine surfaced at harbour, giving a rare view of the crew in daylight rather than the cramped, dim interior where they spent most of their service.
The officers appear relaxed but purposeful, suggesting a moment of routine inspection or preparation. Submarine crews were highly trained specialists, responsible for navigating, maintaining machinery, and operating the vessel’s weapons under extreme pressure.
At one end of the deck, a crewman grips the cranking handle of a machine gun mounted on the submarine. Although U‑boats were primarily designed for underwater attacks using torpedoes, deck guns and machine guns were essential when engaging smaller vessels or defending the submarine while surfaced.
Torpedoes remained the submarine’s chief offensive weapon, capable of crippling or sinking large ships with a single strike. However, the deck armaments allowed the crew to conserve torpedoes when confronting lightly armed targets.
On the gangplank, a group of German naval officers can be seen performing maintenance work. Submarines required constant inspection and repair, especially after long patrols in harsh sea conditions. Even small mechanical issues could become life‑threatening once submerged.
The officers’ presence on deck suggests a moment of preparation — perhaps before a patrol, or immediately after returning from one. Their uniforms and posture reflect the discipline and hierarchy typical of the Imperial Navy.This photograph shows German naval officers on deck of a submarine at Ostend in 1918.
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| British Naval Ship HMS Vindictive Prior to the Zeebrugge Raid |
These vessels were never meant to return home. Instead, they were chosen for a single, high‑risk purpose: to be deliberately sunk in the narrow channel leading to the Bruges–Zeebrugge harbour, blocking German U‑boats and destroyers from reaching the open sea.
HMS Intrepid and HMS Iphigenia were part of a group of “blockships” — older, expendable vessels selected for scuttling. Their role was central to the British plan to hinder German naval operations along the Belgian coast.
To prepare them for this mission:
The ships were stripped of unneeded equipment
Their hulls were strengthened and filled with cement
Explosive charges were placed for controlled sinking
Crews were selected for the mission.
Once inside the channel, the crews were to detonate the charges, abandon ship under fire, and escape by motor launch.
In this photograph, the blockships lie low in the water, their decks tilted and their hulls partially submerged. The aftermath of the raid can be appreciated — the moment when the ships, weighing thousands of tons, had settled into position.
From this angle, the ships appear ghostly, their battered forms silhouetted against the geometry of the Mole. The stillness of the scene belies the chaos of the night before: smoke, gunfire, searchlights, and the manoeuvring of ships under German fire.
The blockships were prepared for this operation:
Cement ballast was added to ensure rapid sinking
Steering and propulsion were reinforced to survive the run‑in
Protective plating was added to shield the volunteer crews
Explosive scuttling charges were installed below the waterline
These preparations turned the ships into massive wrecks — floating obstacles designed to choke the harbour entrance.
The photograph shows the success of that engineering: the vessels lie exactly where they were intended to settle.
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| Dramatic closeup view of Scuttled HMS Iphigenia and HMS Intrepid |
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| Naval Mechanics on the Zeebrugge Mole, 1918 |
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| German Submarine bomb damage on the Mole |