Herdla Torpedo Battery – Defending Bergen in WWII and the Cold War

Despite overshadowed by the natural beauties of Norway, the heritage of the rich war history of this Country would really deserve a dedicated trip. Thanks to its geographical location, this Scandinavian Nation had a primary strategic role both in WWII and the Cold War.

Hitler’s Third Reich military forces conquered Norway early in WWII (Spring 1940), gaining an effective stronghold for launching sea and air patrolling missions over the Norwegian Sea and the northern Atlantic. The long coastline stretching from the Skagerrak strait up to North Cape was made impenetrable to enemy invasion, building anew a capillary network of fortifications – the Atlantic Wall. This masterpiece of military engineering was based on an extensive catalog of reinforced concrete standard elements (Regelbau in German), ranging from fortified casemates to radar towers, to observation and target range finding stations, to bunkerized gun batteries, etc. These elements were assembled in larger fortified compounds, placed in key strategic locations along the coast or in the narrow firths reaching to major ports and towns, like Bergen or Trondheim.

Typically run by the Kriegsmarine (Navy) or Luftwaffe (Air Force), these forts may comprise measuring stations, anti-shipping guns, anti-aircraft cannons, plus barracks, services, ammo storages, and even airfields in some cases. They were built not only in Norway, but having been originally planned by the Third Reich to protect the entire coast of conquered continental Europe, they were erected along the shoreline also from Denmark down to France.

As a matter of fact, many of the Norwegian fortresses of the Atlantic Wall rank today among the most massive and well-preserved of the entire line (see here for some highlights).

But the war history of Norway, and of its mighty military infrastructure, didn’t stop with the end of WWII. With the start of the Cold War, Norway became a NATO founding member, and once again of great strategic value. It found itself in close proximity to the USSR, and with a long coastline facing the sea corridor taking from the highly-militarized Murmansk and Kola Peninsula (see here) to the northern Atlantic.

Most of the Atlantic Wall forts, especially anti-shipping and anti-aircraft gun batteries, were obsolete by the 1950s, and were soon deactivated. Some were abandoned or, when retained by the Norwegian military, they were modified to cover new functions.

In a few cases, the original mission of the site by the Third Reich was retained by NATO forces in the Cold War. This is the case of the torpedo battery in Herdla.

The fortress of Herdla was a major strategic fort in the Atlantic Wall, allowing to keep a watch on the entry point to the inner waters leading to the large industrial and military port of Bergen. Thanks to the morphology of the area, featuring a rare spot of flat land nearby a steep and rocky cliff, an airfield was installed by the Third Reich besides a set of bunkers, effectively hidden in the rocks. A land-based torpedo battery, consisting of a range-finding and aiming station and torpedo-firing tubes, was part of the fort.

During the Cold War, it was decided that the torpedo battery could be still a valuable asset, and Herdla was retained by the Norwegian military – by comparison, the airfield, too short for the requirements of the jet-era, was not. Over the years, the torpedo battery was potentiated to keep up-to-date against the technological offensive capabilities of the Eastern Bloc, and to exploit the most modern identification and surveillance techniques.

The torpedo battery was part of a larger naval fort, which controlled also the barrier of sea mines implemented to stop a sea-based intrusion towards Bergen.

As a matter of fact, the area control functions and the offensive capability of Herdla were retained until the early-2000s, when the fortress was deactivated following the end of the Cold War and defense budget cuts.

Luckily however, the often neglected Cold War chapter of warfare history has in Herdla a valuable asset – an accurately preserved fortress regularly open for a visit. A modern visitor center welcomes the more curious travelers, leaving Bergen towards the remoteness of the coast. It retraces the WWII heritage of the Herdla site, thanks to an exhibition centered around an original Focke-Wulf FW190, recently salvaged from the bottom of the sea, and with a special history to tell. Then a visit to the battery, looking like it had just been left by the military staff, is a unique emotion for both the specialized war technology enthusiasts and the general public as well.

The following report and photos is from a visit taken in Summer 2022.

Sights

As outlined in the overview, the Herdla site today is centered on two major highlights. One is the visitor center, with the preserved relic of a unique Luftwaffe Focke-Wulf FW190. The other is the former torpedo battery and Navy area command bunker, Norwegian facilities installed during the Cold War in bunkers dating to the Third Reich era.

Visitor center & Focke-Wulf FW190 exhibition

The relic of a Focke-Wulf FW190 A-3 German fighter from WWII is hosted in a dedicated room, where a scenic lighting makes this impressive exhibit literally shine.

This exemplar of the iconic Third Reich fighter, produced in some thousands examples, and now almost impossible to find especially in Europe, is ‘Gelbe 16’ (which can be translated in ‘Yellow 16’) of 12./JG5, and its history is deeply related to Herdla.

It took off on December 15th, 1943, from the airfield the Luftwaffe had established on the flat area now lying ahead of the visitor center, at the time a very active German airbase.

Following troubles with the engine, it ditched in the cold inner water near the island of Misje, some ten miles south of Herdla, the pilot being able to abandon the doomed aircraft, and being saved by local fishermen – and returned to the Luftwaffe, who had a Norwegian resistance prisoner released in acknowledgment.

The aircraft sank to the bottom of the sea, but its memory was not lost by some of the locals, who clearly remembered the events. The Focke-Wulf remained there for 63 years, but it was finally located and pinpointed by the Norwegian Navy, instigated by local interest, in 2005. After preparatory work – including exploration dives, to assess the condition and to set-up recovery operations – the fairly well-preserved wreck was lifted to the surface on November 1st, 2006, and loaded on a tug. Conservative restoration work then took place in Bergen.

Instrumentation and the machine guns were all recovered, together with many further fragments of equipment. Interestingly, evidence of repaint was found during conservation, retracing some previous assignments. Yet the history of this very exemplar remains difficult to write in its entirety.

Finally, following completion of conservation works, a new home for the aircraft was prepared in Herdla, where a hangar was built anew – and this is where you can see it today.

The aircraft is in an exceptional state of conservation, considering it spent 63 years in sea water. The fuselage, wings and tail are not significantly damaged, with just some paneling having disappeared on tail control surfaces, due to corrosion. The swastika on the vertical stabilizer is still perfectly evident, like other painted details.

The propeller blades are all bent downstream, as typical for an emergency landing carried out without the landing gear and the engine still running. The tail wheel is there with its original tire, the emblem of the German brand ‘Continental’, still in business today, being clearly noticeable.

The instrumentation from the pilot’s control panel has been put on display separately. Also a gyroscope has been found. Everything is only slightly damaged. Similarly, the two machine guns, dismounted prior to lifting the aircraft from the sea, are little damaged, and displayed with some ammo.

Complementing the exhibition are a few other pieces from other wrecks, as well as some quality scale models and dioramas portraying Herdla in the days of Third Reich tenancy.

Torpedo Battery

Access to the torpedo battery, which was built in WWII just above sea level, is from a gate on the land side. From outside, the bunkers in the fortress of Herdla appear especially well-deceived in the rocks of the cliff.

What is seen today inside, however, dates to the years of Norwegian tenancy. The facility was updated in several instances during the Cold War, the last in the 1990s. Immediately past the gate, you get access to a modern and neat mechanics shop, where a partly dismounted torpedo allows to have a suggestive look inside this marvelous weapon.

Interestingly, Norway inherited and went on operating a significant number of German G7a (TI) torpedoes. This was the standard torpedo employed by the Kriegsmarine since 1934, and with some modifications (‘TI’ standing for ‘first variant’, the later variants bearing other codes), for the full span of WWII.

Propulsion power for this torpedo was from a piston engine, fed by high-pressure vapor obtained by the combustion of Decaline with compressed air stored onboard, mixed in a heater (i.e. a combustion chamber) with fresh water, similarly stored in a tank. The resulting mixture fed a 4-cylinder radial piston engine, driving two counter-rotating propellers. The exhaust in the water produced a distinctive contrail of bubbles, and the presence of a high-frequency moving mechanism had the side-effect of a significant noise emission. The head of the cylinders can be clearly seen in the dismounted exemplar.

Guidance was provided by rudder steering controlled with the help of gyros, whereas depth was controlled via a mechanical depth sensor. The torpedo could stay close to the surface or keep an assigned depth. In WWII the torpedo had no homing device – i.e. it was ‘blind’, thus requiring carefully putting it on a target-intercept trajectory. It could however cover pre-determined trajectories of some sophistication. The set-point selection for guidance and the yaw regulation gyro assembly have been taken out of the torpedo, and can be checked out in detail.

The range could be selected before launching, and was traded off with speed. It could be between 5.500 and 13.200 yards, and the speed ranged between 44 kn and 30 kn correspondingly. The German origin of the torpedo on display is betrayed by the writings in German on some parts.

Leaving the workshop through a gate towards the inner part of the bunker, a roomy supply storage area can be found, with some interesting material including torpedo parts, as well as a torpedo launching cannon.

This item represents the primary way of launching torpedoes in the early Cold War from land-based batteries or ship decks. This was a technology inherited from WWII, when coastal batteries of the Atlantic Wall ejected torpedoes from slots in the bunker wall, shortly above the surface of the water, employing cannons similar to this one (which dates from the Cold War period), thanks to a burst of compressed air. This cheaper, but less ‘stealthy’ and accurate launching procedure, was replaced by underwater launching tubes only over the years of the Cold War, featuring an increase in the level of sophistication of warfare. Correspondingly, the slots in the side of the torpedo battery bunker facing the water were bricked up, and torpedo cannons were retained mostly for use from the deck of warships.

From the storage room you get access to the core area of the battery. This is through a decontamination lock, with gear for anti-contamination testing, including paper strips for checking contamination from poisonous gas.

The battery features two diesel generators for electric power, employed in case of disconnection from the regional grid.

Less usual – for a military facility – is the presence of two air compressors. Compressed air is relevant for torpedo operation, being employed for the launch burst from the torpedo tube, as well as for propulsion and gyros in the G7a torpedo. The air compressors in Herdla are made by Junkers, solid German technology from 1961!

A few bunkerized resting rooms for the staff manning the battery can be found in the same area, besides the power/compressed air supply room and the torpedo room. The resting rooms are minimal as usual, with suspended berths, and much personal military equipment on display – coats, blankets, medical kits, and more technical material.

Finally, the core of the battery is the torpedo room. This is much longer than wider, access is via the short side. In the Third Reich years, the launching slot was on the short side to the opposite end of the room, right above the water. Today, this slot has been bricked up, and there is no window at all.

The torpedoes are aligned on racks along the long sides of the room. The launching system is via two underwater tubes, which are accessed via obliquely mounted hatches, one to each side of the room at the level of the floor. The section of the racks closer to the entrance door is actually a pivoting slide. The slide could be pitched down, thus allowing the torpedo to slip through the hatch in the firing tube. The original launch control console can be found to the right of the access door – in a mint condition, it looks really like it had just been put in standby following a drill!

Over the years, the stockpile of G7a TI torpedoes was upgraded especially in terms of guidance. The major modification was the adoption of wired control. This is based on a thin electric cable unwinding as the torpedo proceeds along its trajectory, keeping it linked with the launching battery. This upgraded model is called G7a TI mod 1. Control via a steering joystick and trajectory monitoring system could provide manual guidance to the torpedo, thus sharply increasing the chance of target interception. This technology is still in use today. Wire tubes can be found on top of the rudder of torpedoes.

Besides the G7a, Herdla battery received the TP613 torpedo, a weapon developed in Sweden in the early 1980s from previous designs. Exemplars of this torpedo, still in use, are visible in the torpedo room. In terms of mechanics, the piston engine of this torpedo is powered by the reaction of alcohol and Hydrogen-peroxide. In terms of guidance, this torpedo features improved wired communication for guidance and power setting (i.e. changing torpedo speed during the run), as well as passive sonar homing. A dismounted section exposing the engine can be found on display.

The wire tube installation on top of the rudder is featured also on this model, and examples of the wire are on display.

The original guidance console, made by Decca, with a prominent joystick on it, is on display as well!

Training and proficiency checks are typically carried out without a warhead, but with an instructional head. Distinctively painted in shocking red, and with powerful lights in them – to show their position to simulated targets during training exercises, when needed – these are on display in a number. Since the torpedoes, just like missiles, are very expensive, a way of recovering them after instructional use has been envisioned, in the form of inflating bags coming out of the head, increasing the buoyancy of the emptied torpedo and forcing it to surface when reactants tanks are empty and power is off.

Offensive warheads can be exchanged with dummy ones for training, bolting them to the body of the torpedo, which remains totally unchanged. A warhead with a 600 lbs explosive load, triggered by a proximity pistol, was typically put on G7a torpedoes. The proximity pistol was made of four petals, which on contact with the target were bent towards a conductive metal ring around the nose cone of the torpedo, closing an electric circuit and triggering the explosion.

Leaving the torpedo room and the bunker is via the same way you came in.

Sea Mines & Area Control Center

But your visit is not over. As mentioned, the Herdla coastal battery hosts an area control center, with provision to manage target detection facilities and the minefields in the waters around Bergen.

This part was built in a facility strongly potentiated with tight doors, typical to the shockwave-proof military construction syllabus of the Cold War. A sequence of roomy vaults carved in the rock hides a number of containerized modules, together with an exhibition of sea mines and related apparatus.

Most notably, an L-type Mk 2 moored mine and a Mk 51 bottom mine are on display, with a understated control panel. The latter is actually a portable controller for triggering the mines. Already before WWII, sea mines were often put on the bottom of the sea in shallow waters, or moored in deeper waters, to control access inner waters, firths, ports, etc. The Germans made extensive use of this technique in Norway, and following WWII this strategy was inherited by Norway to protect its waters from (primarily) Soviet intrusion.

Despite contact mines were still popular in WWII, they have been surpassed and gradually replaced already in that age by proximity mines, based on noise and – especially – magnetic sensors. Today, proximity fuses activated by the magnetic field of ships or submarines passing nearby are standard technology. Onboard electronics allows to distinguish between the magnetic signature (i.e. fingerprint) of different ships, thus avoiding any issue for civilian or friendly traffic, and activating only against enemy shipping. Degaussing techniques – i.e. the ability of military ships to hide their signature – have forced to improve detection technology, which is today extremely sophisticated.

Furthermore, for the protection of ports and friendly waters, sea mines are typically controlled and triggered by hand, upon detection and localization of enemy shipping, by means of dedicated detection facilities on land or water. This improves precision and allows more flexible defensive-offensive tactics, since a human chain of command has control on the minefield, instead of a pre-determined computer program.

To trigger the mines, consoles like that on display are employed, where a trigger for each mine allows precise control over the minefield.

The first containerized control center hosts a similar, yet much more modern, dedicated console. Everything in this movable control center is very neat, and really looking like reactivation might take place in just moments! Of interest is also the situation map, covering the area around Herdla and the water inlet to Bergen.

A nearby container reveals berths and a small living area for stationing staff.

Yet another container hosts a complete situation room covering the area. Similar to the coastal battery in Stevnsfort, Denmark (see here), a careful eye was constantly overlooking the shipping in the area.

In the same container, a console for steering torpedoes, more modern than that previously seen in the torpedo battery, is on display.

All in all, Herdla is a one-of-a-kind destination, of primary interest for those interested in Cold War military history, enjoyable and easy to visit. Totally recommended for everybody with an interest in history, with much to see and learn for the kids as well.

Getting there & Visiting

Herdla fortress features an official visitor center with a large parking area, and amenities including a small restaurant and a shop. The official website is here. It can be reached about 27 miles north of central Bergen, roughly 45 minutes by car. The address is Herdla Museum, Herdla Fort, 5315 Herdla.

The torpedo battery and control bunker can be visited only on a guided tour. Visiting from abroad, we scheduled an appointment, and were shown around by the very knowledgeable guide Lars Ågren, a retired officer of the Royal Norwegian Navy. He joined the Navy in the late 1970s, in time to gain a substantial, hands-on Cold War experience during the final, high-tech part of that confrontation. He was promoted to tasks in the NATO headquarters in Belgium, later returning to Norway, and totaling more than 37 years in service. He is strongly involved in the management of the Herdla site. Chance is for you to embark on a visit with this guide, or other very competent guides who will satisfy the appetites of more committed war technicians and engineers, being capable of entertaining also the younger public as well.

A visit to the torpedo battery and control center may last about 1 hour. Seasonal changes to opening times may apply, as common in Northern Countries, therefore carefully check the website.

Traces of World War II in Norway – Highlights

War actions in Scandinavia constitute a crucial stage in the unfolding of WWII events in Europe. The strategic position of the Scandinavian peninsula was not overlooked by strategists in the Third Reich and the USSR, and by the Western Allies. As a matter of fact, the German invasion of Denmark and Norway took place as early as the Spring of 1940, starting just weeks before the invasion of Holland, Belgium and France.

History & Remains – A Quick Summary

For Germany in WWII, the long and impervious coast of Norway constituted an ideal strong point to carry out raids over the North Sea, Norwegian Sea, the northern Atlantic and the Barents Sea, interfering with resupply convoys from Britain and the US. Especially after the start of the war against the USSR in 1941, the polar routes going to Murmansk – the only non-freezing port on the northern coast of the USSR – were within range of German warships and aircraft operating from the north of Norway. Control over Norway and Denmark meant total control on the access to the Baltic Sea, thus protecting the northern coast of Germany from direct attack by the Western Allies, allowing unimpeded action against the Soviet Union on that sea. Of the greatest importance in the northern European territory was also the abundance of raw materials – mainly metals for industrial production – so desperately needed by the Third Reich.

For the Allies, keeping Scandinavia was an objective of great relevance in the early stages of the war, since this territory could be a convenient springboard to launch attacks against the flat and easy coast of Germany. In the rapidly changing complex alliances and diplomatic relationships of the early stage of WWII (1939-40), Norway and Sweden tried to keep out of the war. Finland fought the Winter War against the USSR (itself one of the results of the Ribbentrop-Molotov pact, albeit not to the knowledge of the Finns), loosing part of its territory and strengthening its link with Germany for some years to come (see this post). The Third Reich attacked Norway by air and sea in April 1940, and help was sought especially in Britain. King Haakon VII of Norway left for exile in England, and the initial battles of WWII between the Reich and the UK were fought – mainly at sea – in proximity of Norwegian ports.

The Atlantic Wall

Possibly the most impressive military trace of WWII in Europe, the Atlantic Wall – a defense line stretching from France to northern Norway – was designed and built in Denmark and Germany, immediately following the successful push of the Third Reich into these Countries. Actually, those are the Countries where the most relevant remains of this interesting trace of war can be found today. A very ambitious project both in purpose and required resources, the Atlantic Wall never reached completion. Despite that, the geography of Norway, with a coastline featuring only limited access to the inland area, allowed to create an effective barrier against a potential enemy landing. Hundreds of gun batteries, complemented with anti-aircraft artillery and radars, constituted a powerful deterrent against any invasion. As a matter of fact, after the unique episode of the Battle of Narvik in the early stages of WWII, no Allied forces ever landed in Norway from the sea for the rest of the war.

A complete visit to all sites of the Atlantic Wall in Norway is a really immense task, due to the number of installations and their geographical remoteness. However, a few impressive highlights can be found in convenient locations, and can be easily visited by everybody. In this post some of them are presented – the colossal battery ‘Vara’, the southern fortified area of Lista, the forts of Fjell and Tellevik near Bergen, and the massive cannons of Austratt.

War Museums

But other fragments of the rich legacy of WWII in Norway can be retraced also away from the preserved installations of the Atlantic Wall. An interesting page is that of naval warfare deployed by the Navy of the Third Reich – the Kriegsmarine – to counter Allied shipping activities. Names like Tirpitz, Scharnhorst and Gneisenau are frequently found in history books as well as in movies or scale model shops, and they are just a few of the mighty vessels linked to the Scandinavian war theater. Dedicated exhibitions can be found in little but impressively rich museums on these topics. In this post, the Tirpitz Museum in Alta, the War Museum of Narvik and the exhibition in the visitor center of North Cape are covered.

Special interest sites

Heroic actions involving the Norwegian resistance organization are proudly remembered all over the Nation. A particularly interesting location being the Rjukan hydroelectric power-plant, which produced heavy water, a key-component in the research leading to the preparation of fissile material. This strategic asset was highly needed by the German nuclear program. On the other hand, its possession by the Third Reich was seen as a clear and present danger by the Allies, who tried to have the plant destroyed in several instances. The Norwegian resistance was clearly much involved in sabotage missions, due to the difficulty in targeting the place through air bombing raids. The power-plant is today a nice museum, covered in this post.

Photographs in this chapter were collected on a visit in August 2022.

Sights

The map below shows the location of the sites mentioned in this chapter. Their listing in the descriptions roughly follows a clockwise sense, starting from the southernmost point of Kristiansand (Vara battery). Red items are in disrepair, whereas blue ones are official tourist destinations.

Navigate this post – Click on links to scroll

Vara Battery – Kristiansand

The Vara battery was built as the core of the strongly fortified area around Kristiansand. Thanks to its position close to the southernmost tip of the Norwegian territory, this port town is still today very busy with passenger and freight traffic from nearby Denmark.

The Third Reich military started to lay sea mines as soon as it gained control of both sides of the Skagerrak strait. The coast around Kristiansand was reinforced with several coastal artillery pieces, and production of a set of special 38 cm caliber guns – called Siegfried -was started by the Krupp ironworks in Essen in 1940. The aim was that of controlling access to the Baltic sea by means of two batteries of long-range naval guns, one to the south in Denmark (Hanstholm, see here), and one to the north in Kristiansand.

The cannons should be capable of revolving by 360 degrees, and special concrete rotundas were prepared for the scope in a location called Møvik, on the southwestern end of the gulf of Kristiansand. The complex morphology of the terrain in this site led to a smaller than desirable area for the battery, where all technical buildings – including ammo storages – had to be built relatively close to one another. These massive constructions alone, built by the same ‘Organisation Todt’ responsible for the implementation of the coastal defense positions all over Europe, make for a remarkable work of engineering, carried out with the help of local builders, working relentlessly around the clock to have these emplacements ready as soon as possible.

In the event, only three of the four Siegfried cannons made their way to the battery in Kristiansand, one being apparently lost when the transport ship carrying it was sunk on the Baltic Sea. Transporting these 110 ton, around 60 ft long barrels by rail from Germany into the narrow valleys of Scandinavia was not an easy task. However, two cannons were test-fired in May 1942, and the third in November the same year.

The battery received the name ‘Vara’, after a high-ranking official killed in Guernsey in 1941.

Battery Vara went through the war without seeing an involvement in any major war action, and was mainly test-fired only. The whole installation, comprising target detection points, analog computers for target aiming, ammo storages – including more than 1.400 shells! – and many other service buildings, was inherited intact by the Norwegian Armed Forces in 1945, similar to many other installations along the coast of the Skagerrak and the North Sea. It was incorporated in the Norwegian coastal artillery between 1946 and 1954, being later placed in reserve having by then become obsolete for Cold War warfare standards. Two cannons were scrapped, whereas one – the only entirely surviving battery Nr. 2 – was luckily kept. The site survived subsequent stages of demolition works over the next decades, but in the early 1990s it was finally re-opened as a museum.

Cannon Nr. 2

Today, the centerpiece of the visit is constituted by a walk around the perfectly preserved building of cannon Nr.2. This bunkerized building is composed of a set of technical rooms, for ammo assembly and storage, as well as for services like Diesel power generators, and an adjoining rotunda, where the big cannon revolved around a pinion, and could be pointed to its target, following instructions from the battery control center. The latter elaborated target data from detection, identification, measuring and range-finding positions scattered around the battery perimeter.

Access to the back of the concrete building is via the original hatch, closed by iron doors. You can see the narrow-gauge railway track leading in. This linked the cannon buildings with the ammo storages around, and allowed to supply the cannon with ammo parts (the explosive cartridge and the shell are not assembled in a single unity for larger cannons, unlike for lighter weapons). The hatch drives you into a long corridor, the backbone of the bunkerized quarters behind the cannon rotunda. Here some shells have been put on the original railway trolley for display.

The cannon building hosted a permanent watch of a few men, which manned it permanently in shifts. A living room with some berths is the only one offering some comfort in the building.

A number of rooms in the bunker are dedicated to the power generator plant. A primary and a back-up generator share the same room. Of special interest are the labels on all machines and mechanisms, proudly made in Germany – in some cases, by brands still existing today.

Electric power was required for the motion of the cannon, besides for smaller appliances like lights and radios. The cannons could make use of the regional grid, but since an unstable supply might have damaged the cannon motors, aiming operations were often carried out on the controlled internal power grid, fed by the generators, and producing an optimal output.

Beside the generator room, the air conditioning plant (not for comfort, but to slightly pressurize the bunker in order to repel and pump-out poisonous or exhaust gas), the Diesel tank and the water tank for cooling the generator can be seen in adjoining rooms.

To the far end of the corridor, a radio room was used to maintain a link with the battery command post, located more than 1 mile away from Vara battery. Actually, by design the electric signals to orient the cannon could be given by the control post, and the radio communication system was there for backup.

On the other side of the corridor with respect to the generator rooms – i.e. towards the cannon rotunda – are four adjoining rooms, used to store the components of the explosive cartridges and shells. The shells and cartridges prepared for firing were moved via a crane to a tray, and from there sent side-wards to the rotunda, where they were loaded on a trolley. The cranes, trays and slots linking these rooms to the rotunda can be found around the area of the bunker closer to the rotunda.

The cranes moved along tracks hanging from the ceiling. These tracks had some switch points, allowing to allow the crane to move across different rooms in the bunker.

Inside these rooms, today you can find much original material of special interest. Specimens of high-explosive (yellow) and armor-piercing (blue) shells are displayed. The weight of the shells was around 800 kg, where the cartridge could feature different weights, roughly from 100 to 200 kg.

The top range of these cannons and shells was around 43 km. Smaller 500 kg shells could alternatively be fired by Siegfried cannons, with a longer range of 55 km. Furthermore, the cannon could be test-fired during drills with smaller caliber shots, by reducing the bore of the cannon. This was a very useful feature, since the estimated loss of barrel metal due to attrition was a staggering 0.25 kg per shot, implying a life of the barrel of only around 250-300 shots, firing with sufficient accuracy. Shooting smaller shells allowed to spare barrel wear and extend the time between overhauls of the cannon.

The sealed canisters for the explosive cartridges, with original markings in German, can still be seen piled in a room!

More material on display includes a rare example of fire direction computer. Actually, that on display is smaller than the one originally used for the long-range cannons of Vara battery, but it provides a good idea of the level of sophistication of this mechanism. Data like target distance, velocity, orientation, wind speed and direction, etc. were set as input to this analog computer, producing fire direction variables to point the cannon. An incredible masterpiece of engineering and craftsmanship, this type of computer is difficult to find in museums, and allows to appreciate the level of development of warfare back in the 1940s.

Data including range of the target was found with the help of special instrumentation. A stereoscopic range-finder was installed in the battery command post, with an arm of 12 m, which allowed good accuracy for very distant targets – required for the long range of the cannons of Vara battery. Smaller instruments with the same principle are displayed in one of the rooms.

Among the special features of this bunkerized building are the restored, original writings from German times, as well as a one-of-a-kind painting made by a Soviet prisoner of war.

From the bunkerized room, you can get access to the rotunda. Cartridges put on trolleys moved along a circular railway track all around the rotunda. This way, cartridges could be taken to the cannon whatever the direction it was pointing. Once to the base of the cannon turret, the explosive charge and the shell were lifted separately by means of two special elevators, up to the level of the gun shutter.

An impressive feature of the rotunda is the ring cover for the circular railway. In order to protect the railway passage from above, while allowing the cannon to rotate, a roof made of thick metal scales was implemented. When revolving around the pinion, the cannon turret would automatically lift the scales on its passage. The sound of the scales being lifted and released while the cannon body was revolving must have been really an experience!

Pictures can hardly tell how big the cannon turret is!

Following an exploration from beneath, you can exit the bunker building, climb up to the level of the barrel, and finally enter the turret.

Here the back of the barrel dominates the relatively large firing chamber. The shutter has been left open, so you can see the sunlight through the barrel.

The shell and explosive charge were received from the two elevators on a special tray, and here they were finally aligned one before the other. Somewhat in contrast to the top-notch technology level of the installation, the cartridge had to be pushed from the back into the barrel by hand. A long wooden stick was used for the task. Actually, it was so long that it protruded from the back of the cannon turret, thus requiring a small hatch to be pierced in the metal armor correspondingly. On one side of the barrel, instrumentation for measuring the pointing direction is still in place.

Air-pumping mechanisms can be clearly seen, similarly to communication phones to the back and top of the room.

Cannon Nr. 1

The position of cannon Nr.1 was prepared unusually close to that of Nr.2. As said, this was due to the limited available area on the uneven coast section where the battery was put in place. However, Nr.1 never received a cannon. Conversely, it was modified later in the war, when experimenting with cannon protection from air-dropped high-yield bombs. The rotunda was capped with a very thick concrete roof, sustained by sidewalls which limited the side-wards rotation of the cannon to 120 degrees.

The rotunda can be walked freely. The central pinion is still in place. Inside, the ceiling is covered in original metal panels. The round corridor for the trolleys can still be seen, but there is no access left to the bunkerized part.

The firing position can be climbed, and from the elevated top you get a great view of the battery and of the area ahead of it.

Other buildings

Following the railway around the site is a great way to find what remains today of the original installation. There are two bulky ammo storages. These were reportedly more thickly armored than usual, in view of a higher risk of getting hit, due to the unusual proximity with the cannons – designated targets for the enemy.

Furthermore, other smaller buildings are scattered around, which may have served as storage for lighter weapons.

The positions of cannons Nr. 3 and Nr. 4 have been largely demolished, and access is permanently shut to the bunkerized part. However, you can easily climb to the top level, to get a nice view of the rotunda.

Visiting

Vara is in the top-five list of the most famous surviving installations of the Atlantic Wall in Europe, and a visit to this destination is in itself a good reason for a detour to Norway for war historians and like-minded people. Due to its proximity to the port of Kristiansand, just minutes apart by car, and the relatively easy-to-reach location in the most populated part of Norway, it is also a top destination for any tourist in the area. As a matter of fact, the place is run as a top-level museum, with great reception capability, and is visited by thousands of visitors per year.

Visiting can be performed on a self-guided basis, with an explanation leaflet which allows to get much from your visit, especially if you are not new to installations of the Atlantic Wall (which are mostly standardized, despite Vara having really oversized guns!). A tour of the main features – cannon Nr.2 and the building of Nr.1 – may take 1 hour at least, for an averagely interested person. For an in-depth visit and a quick tour of the premises including other remains, more than 2 hours are needed. Thanks to the exceptional level of conservation and the explanation of whatever is on display, the visit is not boring and may be very rewarding even for younger people.

Large parking on site, picnic tables and warm reception are available – as usual in Norway! Website with full information here.

Nordberg & Marka Batteries – Farsund

Located in the southwestern corner of the Norwegian territory, about 100 miles south of the port of Stavanger, the municipality of Farsund encompasses a number of small coastal villages, around the landmark represented by the lighthouse of Lista.

Two batteries were set up by the German occupation forces as part of the Atlantic wall, both fully operative by 1942. The northern one is called Nordberg fort, where the southern one, very close to the shore line, is known as Marka fort. Between the two, the Germans installed a full-scale airbase, with a runway of roughly 1.5 km, complemented by hangars and shelters largely standing today. Following the end of WWII and the withdrawal of the German military, all these installations were converted for military use by the Norwegian armed forces, which also developed the original airfield into a more modern airbase by stretching the runway.

Today, Nordberg fort is a museum. The German Navy was in charge of the station, which had as centerpieces three 150 mm cannons, with a range of around 23 km. The cannons have been scrapped (with the exception of a lighter piece of Russian make). However, the firing positions are still there, linked by a semi-interred trench.

You can see also the original control point for the battery, developed by the Norwegians more recently, and the concrete base for a radar antenna originally on site.

Several original buildings for services – canteen, hospital,… – are still there, making for a an interesting opportunity to see how this installation looked like back in the 1940s.

The Marka fort was assembled around six 150 mm guns, located very close to the sea, grouped in two batteries of three firing positions each. A huge bunkerized command post was built in the premises of the fort. Today, after the Norwegian military left at the end of the Cold War, the Marka battery is basically a ghost site, despite being still in a relatively good shape.

The control bunker is especially interesting, since you can access the top level and watch the sea from the very same room and windows originally used by the German Navy troops! The general arrangement of the bunker is similar to other command posts you can find on the Atlantic Wall – especially in Denmark (see here).

The positions for the coastal guns can be reached close to the control bunker. They are uncovered round areas, slightly below the level of the ground, framed by a circular reinforced sidewall.

More Atlantic Wall remains, like bunkers, foundations for radar stations, or emplacements for lighter guns, can be  be found scattered in the area of Farsund – which kept its military site status well after the Germans had left.

Visiting

The museum of Nordberg keeps some of the buildings on the respective site open. However, the majority of the site is open 24 hours, and can be walked freely. A visit may take about 1 hour. A convenient parking can be found right ahead of the modern and welcoming visitor center, from where you can effortlessly reach most of the points of interest in this installation. Website with full information here.

The site of Marka – not part of any museum – can be approached at any time with some walking in the rural area along the coast line. A good starting point for an exploration is here, where you can leave your car and move along an easy trail to the command bunker and the gun rotundas about 0.5 miles west.

Fjell Fortress – Bergen

Bergen was a strategic base of the German Navy, which received a fortified submarine deck among the largest, most active and longest lasting in the history of WWII. The complex morphology of the territory around this port town allowed to effectively protect the access by means of a network of nine firing emplacements. One of them – Fjell – was of exceptional power and range.

It was built between 1942-43 diverting one of the batteries of battleship Gneisenau, which had been damaged beyond repair by an air raid while in port at Kiel (Germany). The battery was composed of three 28 cm guns in a single turret. The latter was very compact in design, a real masterpiece of naval engineering, but nonetheless it featured a rather tall substructure, with all that was needed to operate the guns – protruding from the relatively sleek top of the turret, surfacing on the ground.

Placing this special battery in Fjell required carving the rocky coast, creating a cylindrical underground pit, inside coated with concrete, to host the turret. The turret, an assembly of around 1.000 tonnes with the guns on top, was then transported up to this elevated site, and lowered into the pit. The battery was test fired in the mid of 1943. It acted as an effective deterrent, and reportedly never used in combat.

The battery was incorporated in the Norwegian coastal defense after WWII, and sadly scrapped in 1968, since by then obsolete, but not yet considered an historical landmark.

Clearly, the battery was in the middle of an off-limits military area in wartime, where bunkers for several services and for the the troops, at least two radar antennas and many emplacements for lighter defensive weapons were installed to protect the battery from ground and air attacks.

Today, the bunker-pit where the turret used to rest is the centerpiece of a visit to the site. Starting from the visitor center on top, where the guns used to be, you can descend to the base of the cylindrical pit – roughly 30 ft in diameter and 75 in depth! Here you can see the rooms originally employed for storing the explosive cartridges and the shells for the cannons. These were supplied on trolleys and slides, and sent inside the metal turret, to be lifted up to the level of the cannons for firing.

Most of the original German mechanical and electrical systems is still there to see, including wiring, phones, cranes, trolleys, and examples of shells and cartridges.

Back then, you got access to these storage areas from an entrance on the same level (i.e. not from the top of the turret, but from the base). You can see this entrance, as well as the curved corridor leading from the gate to the ammo storage area. Here, examples of sea mines and other war material can be found. The corridor has narrow-gauge railway track, which was used for resupplying the ammo storage from outside.

The corridor is curved, and firing positions are strategically placed to cover it, in order to counter enemy intrusion.

The bunker gives access to the living quarters for the troops. These are well preserved, and feature brick walls to help insulating the inside from the wet rock of the walls and ceilings.

Services, like toilets, sauna, washing machines and more, are original from the German tenancy. Especially the water basins appear very stylish, a good example of German design from the era.

Besides the main turret bunker, as said the Fjell site offers other constructions on a vast area, which can be checked out from the outside – also since the premises are at least formally military grounds still today.

The road reaching the site from the parking, gently climbing uphill, is reportedly the original main access to the Third Reich site. An interesting tank-stopping device can be seen to the lower end of the road – heavy stones on top of light pillars on the sides of the road. The pillars could be blown, and the stones would fall cutting the road, in case of a potential intrusion.

Visiting

The fort of Fjell, about 15 miles west of central Bergen, is professionally run as a museum. Parking is only possible to the base of the cliff where the turret used to stand. From there, a 0.8 miles road climbs to the entrance. The scenic location and the nice rural area around make for an enjoyable walk. Visiting inside is only possibly on guided tours, offered also in English (an possibly other languages). A small restaurant can be found on top, where an observation deck has been built in place of the battery.

The location of the parking is here. A visit may take around 45 minutes, excluding the time needed to climb uphill and descend to the parking. Website with full information here.

Tellevik Fort – Bergen

The coastal fort of Tellevik, on the eastern head of the Norhordland Bridge, 15 miles north of Bergen, was part of the lighter defense artillery put in place by the German military to defend any access by water to Bergen. The battery was built by order of the Third Reich, profiting from the forced labor of Soviet prisoners of war.

Lighter howitzers were enough to cover the narrow water passages in proximity of the town. The elevation of the emplacement is low, slightly above the water surface.

The battery of Tellevik was centered on two such howitzers, placed on open-top positions. The two guns can be seen still today, on round concrete firing positions. The giant bridge today largely obstructing the field of sight was not there at the time of the German occupation.

The site displays also a concrete trench, connecting the firing positions with a command post for the battery.