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The Germans suffered from the submarines of the Imperial Chinese Navy on the sea, so in order to counter the underwater threat of the Song-class submarines of the Imperial Chinese Empire, the Germans immediately began to experiment with anti-submarine aircraft equipped with the newly invented magnetic anomaly detector equipment. Pen @ fun @ pavilion wWw. ｂｉｑUｇE。 ｉｎｆｏ╔╗

During the initial tests, a Junkers anti-submarine aircraft took off from Kiel terminal and discovered a German U-boat. In order to simulate the silence ability of the Song-class submarines of the Chinese Empire, the U-boat has been suspended underwater, and even the engine has been turned off.

The Junkers anti-submarine aircraft succeeded in discovering the U-boat in this situation, thus verifying the reliability of the German army's newly developed magnetic anomaly detector system. In addition, in the ten days before the departure of the German High Seas Fleet, the German Naval Research Laboratory confirmed that the radar system of the Junkers anti-submarine aircraft can receive and transmit electromagnetic pulses without the use of bulky attached antenna systems. ╔╗

Although as early as the forty-first year of Guanghua, the Chinese Empire took the lead in the development and testing of anti-submarine airships. At that time, a special anti-submarine sonar buoy was developed, but this concept was not fully recognized by the powerful Chinese Imperial Navy at that time, and only a few related laboratories of Beiyang Science and Technology were in use. At that time, airships patrolling were a waste of time and weapons, even if the target was a wreck. A sensor is needed to effectively confirm the target detected by the magnetic anomaly detector. Thus, the concept of sonar buoys was again proposed.

In March of Guanghua 42, the naval aviation of the Chinese Imperial Navy, near Dagu, demonstrated a practical sonar buoy. ╔╗An anti-submarine airship belonging to the Imperial Chinese Naval Aviation detected the sound of the SS-120 submarine propeller five kilometers away. However, the batteries used in sonar buoys at the time could not support the radio equipment. This limits wireless signal reception to about five kilometers.

Three months later, a specialized institute for the study and testing of magnetic anomaly detector systems was formally established at the Ninth Sea Training Center under the Admiralty of the Chinese Empire. The successful deployment of the magnetic anomaly detection system has led to an urgent need for weapon systems for attacking submarines, but due to the large-scale service of Song-class submarines by the Imperial Chinese Navy, the Imperial Admiralty has refused to inject funds into research and development and procurement in order to prevent other countries from imitating this anti-submarine equipment.

However, Beiyang Technology has not stopped researching in this area. ╔╗The magnetic anomaly detector is to find out the position of the submarine when the aircraft flies over the submarine, and the weapon system designed by Beiyang Science and Technology Heavy Industry and the Institute of Science and Technology of Beiyang University from the short-distance reverse flight to the approximate position of the magnetic anomaly detector, and then release the depth charge, is first installed in the seaplane for testing. A year later. It was installed on the Y-3 anti-submarine aircraft to cooperate with the on-board magnetic anomaly detector.

Although Beiyang Technology also kept this strictly secret, a German female student at Peiyang University successfully seduced a Ph.D. who had participated in a magnetic anomaly detection system through sexual means and obtained the relevant technology. This technology was quickly taken seriously by the German side and played a key role in the development of anti-submarine patrol aircraft in the German naval aviation.

The German army has mastered advanced anti-submarine technology and successfully conducted relevant tests. ╔╗The German Navy originally planned to use it directly against the Song-class submarine formation of the Chinese Empire, but the Chinese Imperial Navy was not prepared for this. But an accident forced the Germans' conspiracy to come to light ahead of schedule.

Norway is located in the northwest of Scandinavia, Nordic and bordered by Sweden to the east. It is bordered by the Barents Sea to the north. It is bordered by the Norwegian Sea in the west and the North Sea in the south, with a coastline of 21,000 kilometers and many natural harbors on the west coast. The strategic position is very important.

Sweden has the most abundant mineral resources, with proven iron ore reserves of 3.65 billion tons, ranking third in Europe, and iron ore is mainly distributed in the northern high-latitude Lapland. Three-quarters of them are concentrated in the Kiruna and Jälival districts.

This kind of iron ore has an iron content of up to 60%~70%, which is the most critical raw material for the production of high-quality steel. ╔╗ All the time. Sweden is both Europe's largest exporter of iron ore.

In the first year of World War II, Nazi Germany consumed 15 million tons of iron ore annually. There are 11 million tonnes to be imported from Sweden. During the warmer months, iron ore can also be shipped from northern Sweden across the Baltic Sea via the Gulf of Bothnia to Germany. Even in wartime, this road will not have problems, since the Baltic Sea has been effectively blocked, and British submarines and ships are inaccessible. But in winter, the Gulf of Bothnia froze and ships could not navigate, and Swedish iron ore had to be transported by rail to the Norwegian port of Narvik, the closest to Lapland, and then by sea to Germany. The entire route ran from north to south along the west coast of Norway, making it highly vulnerable to British attacks. Therefore, after the German occupation of Norway, it was not only able to ensure the safety of iron ore transportation, but also to control shipping in the North Sea region.

With the entry of the Chinese Empire into the war, the Chinese Imperial Air Force carried out large-scale strategic bombing of the Allied Powers and carried out large-scale aerial mine-laying operations along the coast around the Allies, resulting in the inability of Swedish iron ore to reach Germany. The German army has always been demanding on military equipment, and high-specification steel is used in the production of military equipment, so the demand for high-specification iron ore is increasing, and it is heavily dependent on the supply of iron ore from Sweden.

The Germans focused on protecting this supply line, dispatching a large number of minesweepers to clear the channel.

At the same time, the British and French sides had always been under the leadership of the Chinese Empire, and the British and French high commands also wanted to act independently, so they considered sending a part of the allied forces [in the name of volunteers] into Finland through Narvik and northern Sweden, and setting fire to the Finnish backyard in order to relieve the military pressure on the Soviet battlefield. It was also more important to take control of the Jälival iron ore mine and, if necessary, to recover Norway and Sweden.

The British had planned to land at Narvik on 20 May, but there was disagreement among the top echelons of the Churchill government, and due to other reasons of infighting, the landing plan was cancelled and a great opportunity was lost.

On May 28, Britain and France secretly convened a supreme military conference in London, but still did not report to the Chinese Empire or the United Nations, and they decided to carry out mine-laying operations in Norwegian waters on June 5, and landed troops in Narvik, Trondheim, Bergen, and Stavanger, and at the same time dropped mines in the Baltic Sea to prevent the German navy from reinforcing to the west. However, since the mines used by the British Air Force were all provided by the Chinese Empire, the British Army's sudden demand for a large number of high-performance mines naturally attracted the attention of the Chinese Empire and the Intelligence Bureau, and as a result, the news of the British and French covert actions was grasped by the Chinese Empire.

The Chinese Empire opposed the invasion of Germany in advance of the Continental Counter-Attack, and after a dispute between China and Britain, the British persuaded the Chinese Imperial Government to distract the Germans by opening up the Norwegian battlefield. In the end, the Chinese and British militaries agreed to postpone the plan by three days, to June 8. This delay led the Germans to deploy defenses in Norway and Sweden ahead of the British.

On the German side, on June 6, Hitler received a secret telegram from the OKW Intelligence Service, and learned that the joint forces would launch a major military operation in the direction of Norway in the near future, so he ordered the German troops in Norway and Sweden to increase their combat readiness, and urgently dispatched the German Baltic Fleet to the surrounding area to be on alert. rq

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