Just when Major Hafs' submarine launched the attack, the other nine submarines were also in position and launched the attack. Explosions began to sound continuously. In just ten minutes, as many as six transport ships Got hit. The main reason for such a high hit rate is that the cover of darkness allows these submarines to travel very close to the ship and then launch torpedoes, which naturally greatly increases the hit rate. Major Hafs was very satisfied with the record of the ambush formation, but he was not satisfied with the -92 record of the one he directly commanded. At such a close distance, the two fish and mines actually missed. This is really Shameful enough. At this time, the Beifeng had already sailed out of the -92's fish shooting range. Of course, if the -92 was willing to change direction, it could still launch another attack on the Beifeng, but at this time other ships entered. Within the shooting range of the -92, the -92 does not require much adjustment. It only needs to wait a moment before it can launch an attack on the ship. Under such circumstances, Hafs naturally would not continue to pursue the Beifeng. He quietly stared at the cargo ship only a few hundred meters away, and mentally estimated the intersection point of the torpedoes and the ship. , and then issued a shooting order. Hafs's shooting was quite successful this time. One of the two torpedoes he fired accurately hit the transport ship, and the torpedo hit just near the keel, and the huge explosion directly broke it. The keel of this transport ship. This kind of blow is the most fatal to a ship. Once the keel is broken, the ship will be torn apart by itself and the weight of the cargo it contains, and it may sink to the bottom of the sea in just a few minutes. But Hafs couldn¡¯t care less about it now, because he found a destroyer rushing towards the -92 at top speed. "Has it been discovered?" Hafs was shocked. Logically speaking, it should be difficult for a British destroyer to detect itself. Hafs immediately wanted to get into the cabin and ordered the submarine to make an emergency dive. But at this time, he discovered that the destroyer had turned on its searchlight to search the sea, and the direction the searchlight was pointing was not on the -92 side, but in the opposite direction. Obviously, this destroyer did not find -92, it just happened to come here. "Turn to 20, prepare the torpedo tubes of No. 5 and No. 6." Hafs decided to attack the destroyer first to see if he could kill it. If not, then you can only dive down quickly and try to hide behind the cargo ship over there that has been hit by a mine and tilted, but has not yet sunk. Targets such as destroyers are generally very difficult to hit. Firstly, the destroyer is too small, so the length of the waterline is also small, so it is naturally more difficult to hit it. Secondly, the destroyer is too fast and flexible. If the speed is too fast, then when launching torpedoes at it, there will be a large amount of lead left, and the destroyer is very flexible and can turn very fast. Once it finds the torpedo, it only needs to change its direction slightly to catch the fish. Lei is definitely going to fail. But tonight, Hafs seemed to be particularly lucky. A torpedo fired by -92 hit the bow of the destroyer, blowing up the entire bow and half of the hull. The destroyer was sailing at a high speed of more than 20 knots, and the water immediately rushed in from the huge gap. In just a minute or so, the destroyer disappeared on the sea. During this time, several other submarines also opened fire. Almost every once in a while, there were explosions of cargo ships being hit by torpedoes. At dawn, the ambush formation, which had used up almost all its torpedoes, withdrew from the battle. At this time, there were only three transport ships still floating on the sea, and a total of twenty ships were lost! Even the escorting destroyers were lost in half, with only three remaining. However, the German submarine that launched the attack retreated without any losses. The North Wind was one of the three remaining transport ships. After dawn, it rescued about a hundred sailors from other ships from the sea, and then continued towards Britain. However, they never encountered attacks from German submarines on the way, and arrived in the UK safely and smoothly. ¡ This successful ambush confirmed the effectiveness of the wolf pack¡¯s tactics. Major Hafs received a telegram on the third day after the attack, telling him to rush back to Germany on a Cow Submarine. After returning to the country, he was immediately promoted to captain, and served in the combat staff group of the Submarine Warfare Center of the German Imperial Navy. He also served as the tactical director of the "Submarine Commander Training Course". His name and achievements have also been printed in various newspapers in Germany. He became an idol worshiped by countless Germans. And his tactics were quickly promoted. Although the British later adopted methods such as setting off flares all over the sky to fight against them once they were attacked, the effects of these methods were actually quite limited. First, the flares The illuminated area is actually quite limited. More often than not, they fail to illuminate the area where the submarine is located.?, and also exposed himself, allowing the Germans to take aim better. ¡°And the Germans painted their submarines a very dark blue-black color, so that even with flares, the low submarines were still not very conspicuous. Of course, flares still have a certain effect. Once, a submarine was illuminated by a flare during an attack. At that time, the submarine was aiming at the transport ship North Wind, and there was a British destroyer not far away from it. As a result, this A destroyer directly collided with it, smashing the unlucky submarine into two pieces, thus saving the life of the Beifeng. However, during this attack, the Germans sank fourteen British cargo ships. The British also discovered the frequent telegram exchanges between German submarines, so they guessed to a large extent the organizational secrets of German submarine operations, so they stipulated that once intensive telegram exchanges at sea were discovered, transport ships would immediately be dispatched The team turned to avoid the German ambush. This trick actually worked a little at first, but later, the Germans also discovered this. As a result, they randomly sent some meaningless telegrams every once in a while, making it impossible for the British to judge whether those telegrams were What really guided the interception was, of course, that German submarines continued to successfully intercept British fleets in the ocean. In the two months after the Germans began to use "wolf pack tactics", the loss rate of British freighters on each transoceanic voyage reached an astonishing about 15%. In other words, if a cargo ship is used to run across Generally speaking, the Atlantic route can only make less than four round trips before it is sunk. Such a sinking speed far exceeds the British shipbuilding speed. Even coupled with the shipbuilding speed of the United States, it is far too late. Only those fast merchant ships ordered from the United States still maintain a small loss ratio, because they can run faster than submarines. Even if German submarines can ambush them, generally speaking, they only have one chance to attack. "To save Britain, we need more, more, more fast merchant ships!" This became the consensus of the British government and military. So Sir Woodgate once again found Macdonald, because now only Macdonald can produce fast merchant ships at ultra-high speeds. "We need more, but cheaper, fast merchant ships. We hope that these ships can cruise at 18 knots even when fully loaded, and have a top speed of more than 20 knots." Sir Woodgard said to Scrooge. "But Sir, you also know that this is not an ordinary indicator. To achieve such a speed, our price cannot be too low." Compared with Sir Woodgard, Scrooge is not in a hurry at all. "You can reduce costs in other places." Sir Woodgaard said, "For example, durability, as long as they can be used for two or three years. So in some non-important places, use low-end goods if you can." That's fine. For example, I don't think you need to use high-end shipbuilding steel plates. If that doesn't work, wrought iron can be used. The anti-rust treatment of many parts can be simpler, and it can last for two years anyway. That's enough. The Germans will never last more than two years. If so, Mr. MacDonald, do you think the price of these ships can drop a little? " "But, sir, if that's the case, it's enough. If this is done, an inevitable result is that the use efficiency of these ships will be very low. After two years, there will be almost no possibility of continued use except for refurbishing. Generally, if the ships are only used for two years, they should be called new ships. Scrooge replied, "If we build such ships, it will ruin our brand. When people mention the ships built by Macdonald in the future, they will say: 'Ah, I know, those only lasted two years.' It will have a huge impact on Macdonald's reputation." Scrooge shook his head, his attitude seemed to be very determined. Sir, you also understand that even if you pay so much and cut corners to reduce the service life of this ship by more than 80%, the production cost will not drop to the original 20%. In fact, it will only drop at most. A little more than ten percent, is it worth it? " Normally, it's certainly not worth it. But for now, the British have to do this, because if they don't, they will be finished immediately. Although in the long run, it is very unworthy to buy such rags, if not, Britain will collapse in the war, and once Britain is defeated, there will no longer be any long-term prospects. "Yes, we only need these ships to have a life of two years. Mr. MacDonald. In addition, can the construction speed of these ships be increased?" Sir Woodgaard continued to ask.