When submarines ambush merchant ships, they have always faced a problem, that is, the speed of submarines, especially the speed of submarines, cannot keep up with merchant ships. ¡÷¡éGenerally speaking, the surface speed of submarines in this era is still much faster than merchant ships, but the underwater speed is quite tragic, often less than 10 knots, and they cannot run for dozens of minutes at this speed. It will drain the power in the battery. Therefore, generally speaking, after discovering a merchant ship, the submarine will first observe the sailing direction of the merchant ship, then run in a circle from the water to the front of the merchant ship, and then dive underwater to wait for the merchant ship. Sail yourself into the range of fish and mines. What, you mean to just go forward, stop a merchant ship acting alone like a raiding ship, and then sink it like a torpedo boat? Come on, this is the time of the war, and merchant ships are not necessarily unarmed. Generally speaking, it is not difficult to install one or two cannons on a merchant ship. For a submarine, which is less than a thousand tons, He swaggered across the water and accidentally got bitten by the cannon on the armed merchant ship. He was afraid that he would be doomed immediately. In fact, there was such a cute fool in Zhenhai in the German Navy, and then the submarine was sunk by a merchant ship. Naturally, the captain perished and made the world smile. Therefore, it is more convenient for submarines to hide under the sea surface and use fish and thunderyin people. But once the merchant ship has an escort destroyer, the situation is different. Because after the submarine discovered the merchant fleet, if it wanted to run in front of the merchant fleet at high speed on the water, it would have to worry about being discovered by a destroyer and then being shot to death. Moreover, even if the ambush is successful, after launching the attack, they will be attacked by destroyers, especially since the British destroyers will be equipped with active sonar in the near future. It would be particularly dangerous for a single submarine to ambush a merchant fleet escorted by destroyers. However, the submarine side was not without solutions. In fact, later D?nitz invented a special set of tactics for the merchant fleet escorted by destroyers, which once defeated the British merchant fleet. Bloody, this tactic became the famous "Wolf Pack Tactics" in later generations. Of course, this tactic cannot be handed directly to the Germans. It must be more secretive. As for how to do it, that is Gray Stone's business. "Captain Hafs, you are accused of disobeying military orders and attacking targets that are not identified as enemy ships without authorization. Please come with us." The U-11 submarine had just docked in Kiel Port, and the captain said: Captain Fus had just emerged from the submarine and jumped onto the gangplank. He was about to quickly complete all the formalities and then go to the city to find a bar to have a good time when he was stopped by several military policemen. The leader The ensign showed him his papers and told him so. "What the hell!" Hafs stared at the second lieutenant fiercely, "I sank tens of thousands of tons of British merchant ships and let tens of thousands of tons of materials that were supposed to be used to kill the Germans sink to the bottom of the sea. Not only did you not give me Are you going to arrest me instead of receiving the Iron Cross?" "Captain Hafs, please calm down." The second lieutenant from the Military Law Department lowered his head and looked at his toes, "You know, this order does not apply to you. It wasn't me, I was just following the order. " "What the hell!" Captain Hafs muttered. He also knew that this matter actually had nothing to do with the second lieutenant of the Military Justice Department in front of him. He was indeed just executing orders. Moreover, the second lieutenant has always been quite polite, so he is not willing to lose his temper with him, which is meaningless. "Deisler, I'll leave all the messy things after the ship stops to you. I have to go with the people from the Military Justice Department now." Captain Hafs tried his best to calm down, turned around, and said to himself said the deputy. "Captain Hafs, in addition, I have been ordered to take away all navigation records." The second lieutenant said again. "Ah, Deisler, go get it to them. Damn it!" Captain Hafs couldn't control his emotions again. Yes, any sailor who stays on a small boat of several hundred tons and floats in the Atlantic Ocean for three months will not be in a good mood. Especially when you feel that you have made merit but have been wronged. "Captain Hafs, please tell us in detail how you ordered the sinking of the Anne." In a small dark room, a lamp shone directly on Captain Hafs' face, This made it completely impossible for him to see clearly the faces of the people who were asking him questions. Hafs had received relevant training to prepare for interrogation by the Allies in the event of capture. He knew that doing so was actually a way to increase the psychological burden on the person being interrogated. However, Captain Hafs felt that this was of no use at all, and anyway, he felt that he had not done anything wrong, so he did not intend to hide anything. "I don't know which ship you are talking about, the Anne." Captain Hafs said, "Some ships?, I only recorded the type of their ship and the flag on the ship, but not the name of the ship. " "So, you didn't inspect the ship in accordance with the regulations? "A voice asked. "Inspecting ships in accordance with regulations? Is there a hole in your head? You mean, we're going to stupidly surface, send two men aboard an enemy transport, inspect their cargo, register it all, and then sink them? We are submarines, not battleships! If we dare to surface, those damn merchant ships¡ªGod knows if those things have cannons hidden on them. I am responsible for the lives of my sailors. Only a fool would surface and die! Captain Hafs scolded, "If this can also be a reason to arrest me, the captain of every submarine in the empire should be arrested." Because all the guys who don¡¯t do this like me are already dead! " "So, let's talk about you and your ship on August 17th. "Faced with Captain Hafs's complaints, the few people who asked questions did not seem to be affected in any way. "August 17th? That day was like this" August 17, in a certain area of ??the northeastern Atlantic Ocean. The weather was not very good that day. Since the morning, strong winds started to blow, and the waves on the sea were very big. The displacement of the U was only 860 tons. Of course, the -11 submarine could only dive underwater to avoid the wind and waves at this time, and the damn strong wind lasted for more than two hours. Although measures were taken, such as asking all sailors who could lie down to lie down, they could. All the sailors who sat down sat still to reduce the loss of oxygen, but the air inside the U-11 submarine gradually became more and more turbid, and the oxygen content in the air became less and less. There was shortness of breath, and even the captain Hafs felt dizzy - this was a sign of hypoxia. "Float, surface." "Although the wind and waves have not significantly reduced, the submarine can no longer stay in water nearly a hundred meters deep, otherwise, everyone will be suffocated before long. The wind and waves on the sea have become slightly smaller. A little, but the U-11 was still shaking violently. Captain Hafs asked someone to turn on the forced ventilation system, intending to quickly ventilate the interior of the submarine, and then dive again. But strangely enough, it only took about ten minutes. , the wind and waves began to decrease significantly, and Captain Hafs gave up the plan of letting the submarine dive again, and emerged from the submarine's control tower, raised his telescope, and began to search for targets on the empty sea. There was still nothing but undulating waves. At this time, the rain clouds in the sky gradually dispersed, and the midday sun shone through the gaps in the clouds, illuminating some distant waves as bright as silver. Taking a deep breath, the moist, slightly chilly air in the Atlantic Ocean made him feel particularly refreshing. He raised the telescope again, planning to look around the coastline again, and then handed the telescope to the lookout. Chadson went down to the cabin and asked the other officers to come out for a breath of fresh air. When he turned the telescope to the four o'clock direction, he suddenly discovered that from below the sea level over there. , a mast popped up, then another, and then another From the position where these ships appeared and the direction in which they sailed, Hafs immediately made this judgment: This is a ship headed for Hafs doesn¡¯t know how many ships there are in the British or French merchant fleet in the Americas. He has only seen a few masts so far. He also doesn¡¯t know if there are destroyers escorting the merchant fleet. How many destroyers are there? Much shorter than the merchant ships, when he saw them, they were very close. Captain Hafs watched them quietly for a while, then ordered the submarine to slow down and semi-submerge (that is, only the control tower was exposed and the entire hull was exposed). (all dive into the sea) and move slowly. This can significantly reduce the area of ??the submarine exposed on the sea. In addition, the submarine itself is painted a gray-blue color close to the color of the sea. This allows opponents to detect the submarine from a distance. The possibility is greatly reduced, which is conducive to the submarine observing the opponent's ships at a closer distance. At this time, in Hafs's telescope, the hulls of those ships have gradually risen from the sea level. Si quickly saw clearly that these were container cargo ships with a speed of about 12 knots. Hafs roughly calculated the speed and course of both parties in his mind, then left the control tower and closed the watertight hatch. , went down to the cabin: "Take out the chart! Hafs shouted, and someone immediately spread the chart in front of Hafs. "We are at this position now, the transport fleet is at this position, and their route should be like this" Hafs Said, "We will dive first and sail in the direction of 260 at a speed of five knots for twenty minutes, then surface and turn to the direction of 030 at a speed of 15 knots In this way, in about three hours and forty-five minutes, we will be able to reach this positionSet it up, then dive down and wait for them to come to your door. "Captain Hafs pointed at the chart and ordered, "Now, get busy immediately, boys, business is coming! "