"The only weapon that kept me up at night in World War II was the U-boat. Pen %Fun %Cabinet www.biquge.info" -- Churchill. Let's not say whether this is an exaggeration, and I don't say what kind of mentality Churchill had when he said this. As a traverser, the only thing the prince can be sure of is that World War II was not the most suitable era for U-boats. And there is only one era when the U-boat can really be used as a strategic weapon comparable to the atomic bomb, and that is World War I, a war that will break out in 12 years! In this day and age, a large number of U-boats are very difficult to crack!

If the total tonnage of German submarines sunk in World War 1 and World War 2 was high, it was naturally higher in World War II, and the total tonnage of ships killed in U-boats in World War 2 was about 20 million tons. The total tonnage of merchant ships sunk by German submarines in World War I was 12,284,000 tons. In addition to the total tonnage, the performance of German submarines in World War I was far better than that of World War II submarines.

In terms of the number of ships sunk, German submarines sank 5,282 merchant ships in World War I and about 5,400 in World War II. In fact, in terms of quantity, it is about the same. A big reason why the 2nd battle submarine performed better was that the tonnage of the 2nd battle ship was larger, so if the same ship was sunk, the deadweight tonnage lost would be greater.......

If we look at the efficiency of submarines regardless of the overall situation, then the submarines of World War I had much higher efficiency than those of World War II. First of all, from the German side, Germany had only 44 submarines before 1915, note that this is the number of submarines owned, not that they could be put into service, in fact only 29 submarines were in a usable state, and 7 submarines from U30 to U36 had been launched and were being outfitted and were expected to enter service by the end of 1914. And another 8 submarines were planned to be launched at the end of 1914. Moreover, among these submarines, the first 18 are gasoline-engine submarines, and most of them are offshore submarines, which are actually not suitable for the task of breaking diplomatic relations.

During the entire war, Germany built a total of 330 submarines, and in the end 176 submarines survived, losing a total of 178 submarines. And these surviving submarines are not equal to the usable state, because when calculating this number, it is calculated according to whether the submarines have the ability to move, and the number of available submarines in Germany has never exceeded 140! Before October 1916, there were never even more than 100 ships!

Purely in terms of the scale of submarine operations, the German submarines of World War I and the German submarines of World War II are not of the same grade at all, and the number of submarines at the beginning of World War II was not very large, but the number of available submarines was 57. Subsequently, in March 1941, the number of ships exceeded 100 for the first time. Submarine ownership then continued to climb, and in October 1941, the number of submarines on the register reached 200. Just four months later, in April 1942, it surpassed the 300 mark, and after January 1943, it exceeded the 400 mark! Subsequently, although they were repeatedly strangled by the naval and air forces of the Allies, the number of German submarines on the register always exceeded 400! This alone is larger than the construction of all German submarines in World War 1!

And if we talk about the amount of construction, from 1942, the number of German submarines under construction per month has been maintained at around 20, and over time, in September 1944, the number of German submarines built this month reached an all-time high, as many as 29 submarines were built in various shipyards, and in the end, the Germans built more than 1000 submarines, the total construction volume was several times that of the 1st World War. The tonnage of submarines is generally much higher than that of the 1st World War, but with 3 times the number of submarines in the First World War, the number of merchant ships sunk is almost the same as that of the 1st World War submarine, which has to be said that the efficiency of the German submarines in the 2nd World War is much lower.

In fact, for every submarine Germany lost in World War I, the Allies lost 30 merchant ships totaling 69,000 tons of registered tonnage. This is 8 times and 4 times that of German submarines in World War II, respectively! That is to say, each German submarine in World War II can only be exchanged for about 4 merchant ships and about 17,000 tons of merchant ship tonnage, if you use Dönitz's tonnage warfare theory, the efficiency of World War 2 can be described as miserable!

And if we talk about the trump card, the German submarine ace in the 1st World War is still stronger than the 2nd World War, the most NB Feng in the 1st World War. Arnault. Morality. Pull. Major Perrier is arguably the most terrifying captain in the world, sinking 194 merchant ships in his lifetime! An astonishing record of 453716 tons!

And the most powerful captain in the 2nd battle, Otto. Before he was captured, Krezimmer sank a total of 47 transports, a 274386-ton achievement, and the number of ships sunk was less than a quarter of the former, and the tonnage was only about 60% of the former, which would have been even worse if it were not for the fact that the ships of World War II were generally larger...... And in fact, even with this buddy's skills, he can only rank fifth among the submarine aces in the 1st war, not to mention the other submarine aces in the 2nd war!

Was the German 2 battle submarine technologically advanced? This is natural, whether it is wolf pack tactics, the concept of using land-based longwave radios and submarine swarms to fight, or the effect is quite good. The use of the Enig cipher machine made the contact with the German submarine an almost unsolvable puzzle for a certain period of time!

However, there is a saying that strength is relative, the tactics and technology of German submarines in World War 1 can be said to be much worse than that of World War 2, but the anti-submarine technology and anti-submarine effectiveness of the Entente countries in World War 1 are not even as good as scum compared to War 2, not to mention the tall sonar buoys, radars, sound-guided torpedoes, B17 anti-submarine aircraft, and active sonar in World War 2. Not to mention the murderous hedgehog bullets, all kinds of acoustic mines, etc. Don't talk about sonar at the beginning of World War 1, I don't even have hydrophones. The probability of success in touching a submarine with naval guns and hulls is greater than the probability of using mines and submarines.

In fact, for the German submarine officers and men, they did not feel how much anti-submarine pressure the Entente had at the end of the war, and compared with the attacks of the Allied hydrophones and escort fleets, all kinds of complicated sea conditions were their biggest enemy! The monthly losses of German submarines have always been less than 10, and the mines of the British have made the Germans comment that "don't be afraid, this thing generally won't blow up....... Of course, the situation changed after the British copied the Germans' new trigger mine, and when breaking through the minefield, the Germans also invented a kind of hull with concrete in front of the hull as a "demining submarine".

To what extent did the Entente begin anti-submarine broilers in World War 1? More than 90% of the surface navigation time can no longer simply explain the problem, the best weapons used by German submarines in World War 1 are not those fish that may have problems with a few rounds, but the deck guns on the submarine! Both 88mm and 105mm were fatal to almost unarmed merchant ships, and the Germans later specially pressed 150mm deck guns on submarines, so that they could fight against slightly armed merchant ships.

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