How can it be anti-submarine in the era when sonar has not yet been done, and there are only underwater hydrophones? This is a historical puzzle, and it can even be said that it is difficult to complete as a traverser without opening a technical golden finger. The First World War was a paradise for submarines, and in history, submarines in World War I could have achieved quite good results even with deck guns. Excluding the factor of scale, the power of German submarine warfare in the First World War was actually more powerful than that of the Second World War!

Without sonar there is no reliable way to locate a submarine hidden under water, (of course, even with sonar, it is very difficult to locate the submarine, after all, there are various terrain and hydrological conditions underwater, and even now, anti-submarine is not an easy task.) So as long as the submarine is submerged, it is generally very difficult to sink. Although there is no way to sink submarines, there are many ways to reduce the losses caused by submarines as much as possible, and the core of anti-submarine warfare in World War 1 should not be on how to destroy submarines, but on how to limit the combat power of submarines.

It's a systems engineering ...... First of all, before the ship leaves the port, it is necessary to make relevant preparations, such as intelligence secrecy, whether it is the first war or the second war, the reason why the German submarine can find the British and French transport fleets on the vast ocean is largely because the Germans have a relatively complete intelligence network, they will steal the ship's navigation plan and send it to the German Navy headquarters, and the German Navy will use this to contact the submarine in the ocean through the long-wave radio in order to encircle and intercept. Therefore, keeping the ship's navigation plan as secret as possible can effectively reduce the probability of being ambushed by a submarine.........

The second is the arrangement of the route, the endurance of the submarine is actually not long, especially when navigating underwater, so if you can avoid the route deployed by the opponent's submarine, then the submarine will not be able to reach it even if it has great ability? Relative to the 2 war. 1. The Great Britain and France had one of the greatest advantages, even if France was not occupied. It was too difficult for German submarines to make a trip, they had to go through the North Sea and then through the Danish Strait and then into the Atlantic. Therefore, it is necessary to consume a considerable amount of fuel before entering the battlefield.

Of course, the so-called route planning is not only a matter of detours, but also an important issue of ship and batch coordination, for example, the United States in World War II made reasonable arrangements and marshalling of transport fleets, which greatly reduced the attack efficiency of submarines. The specific method is simple: before entering the range of German submarines, multiple convoys use low speeds to save fuel, and then enter a pre-demarcated assembly area, and then the flotilla is in place. Organized into a large unified fleet, under the cover of escort warships, looking for a route. Fast passage through the hunting grounds of German submarines.

The principle is simple. A very simple probability problem, let's say you have 100 merchant ships on 10 routes, and 2 of those 10 routes are divided into German submarines. Then the probability that you will run into a German submarine is even 100%. And if you choose 6, then the probability of encountering a German submarine will be much lower. And if you choose only one path, then the probability of hitting a submarine is only 1 in 5! And because the fleet is concentrated, the escort force will inevitably increase, and even if it does, the probability of survival will become greater..........

After the issue of routes and confidentiality is solved, another very important and core issue is escort. Unlike countering surface assault ships, anti-submarine warfare ships are not very demanding except for hydroacoustic equipment, and the power almost doesn't matter. As long as you can keep up with the fleet. The artillery is almost okay, the cannon is actually enough. It doesn't matter if the protection is almost there, the artillery battle between the submarine and the destroyer is to find death, and it has little to do with armor protection, as for the torpedo? All right. Immortals can't save it. …。

What destroyers need is quantity! Deploy a large enough cordon around the fleet with a sufficient number of old destroyers to force submarines to dive far away, and make submarines have to go far around if they want to ambush the fleet. As for attacking submarines under water? Don't think about accuracy, by the time of World War II, a destroyer throwing all the depth charges may not be able to get a submarine, so it is necessary to have several destroyers, emphasizing that as many depth charges as possible can be thrown into the water in the shortest possible time in order to achieve a covering attack. So the famous hedgehog cannon in World War 2 was like this, shooting a series of bombs at once, and the fuses were set at different depths to form a three-dimensional death zone. And in real combat, it is necessary for several destroyers to act together, and the effect will be even better..........

The so-called escort system does not only refer to the destroyers that accompany the fleet, but also includes a large number of patrol ships cruising the sea, and their task is to search for opponents in the area where the submarine is likely to appear, not how many submarines you can sink...... It's about making the submarine dare not show its head. You must know that even by the time of World War II, the hull design of most submarines was ship-shaped rather than drop-shaped in later generations. The fundamental reason is that submarines actually sail on the surface of the sea most of the time, and German submarines can sometimes account for 95% of the total range on the sea during World War 1. To put it bluntly, you will only dive when you attack.

The speed and consumption of the submarine under water are very large, and the search ability has also decreased greatly, so suppressing the submarine under water is equivalent to weakening the range and combat power of the submarine. If you catch up with a submarine that runs out of power and is charging at sea, and is unfortunately discovered by a destroyer, then it is okay to drag it until the oxygen inside the submarine is exhausted and forced to float. In this way, many submarines in the 2 war were consumed alive by destroyers!

In addition, these patrol ships had a very important role in striking the camouflaged supply ships that supplied the Germans with fuel for the submarines. Because of Xu Jie. The Germans had begun to pay attention to the problem of the supply of submarines to the ocean, and they planned to use camouflage cruisers to carry out reconnaissance and break-up operations on the one hand, and to supply submarines with fuel and supplies on the other, and those patrol ships were definitely a formidable enemy for these camouflaged cruisers. And Germany's plans to resupply submarines could be hit ......... seriously.

The British actually did not lack ships, the pre-dreadnought era built a large number of various destroyers and cruisers with the progress of the times have fallen behind, they can not play a role in the main duel, but they can play a huge role in anti-submarine and escort operations, and even if you remove part of the artillery above to strengthen the army, it doesn't matter, as long as there are depth charges! If there is a relatively sound escort and coordination system, Xu Jie believes that German submarines will definitely not play the glory they once had.

In war, there are always some key materials or personnel that cannot be lost in the slightest. For example, troop carriers. For example, transport ships that transport some key weapons. For example, during World War II, the British used super cruise ships to transport soldiers, and the Queen Mary cruise ship could transport tens of thousands of soldiers to the other side of the ocean at a time. And there must be no room for error in this kind of action.

The most powerful weapon of these cruise ships is high speed, which is always maintained at an ultra-high speed of more than 25 knots, making it impossible for any submarine to attack. Together with the frigate, they crossed the Atlantic Ocean many times in extreme secrecy without any accidents, and it was proved that high-speed cruise ships are not afraid of submarines at all, not only high-speed cruise ships, but when any ship is traveling at a speed of more than 15 knots, submarines do not have a very good way to attack, and if they can't keep up with their surface speed, how to track and set up ambushes? It can only be like a big luck to set up an ambush in advance in the place where the other side may pass, and whether or not the results can be achieved may only depend on God's arrangement, and the efficiency of such an action is very low. …………。

Therefore, building a large fleet of fast transport ships is also a good way to deal with submarine warfare, and the cost of increasing speed and fuel is completely less than the loss caused by the sinking of the cargo on the ship. Therefore, if the British government gives some compensation for the construction of "high-speed ships", Xu Jie believes that after the war, the British communication lines will be much safer.

These are measures that can be done at this stage, which are already quite a challenge for fledgling submarines...... However, events in the world are interconnected, and the British may have implemented a convoy system at the beginning of the war, but at the same time, the Germans may have invested more resources in submarines, and of course, in terms of performance. Xu Jie's fundamental purpose is to make Germany and Britain fight to lose, and the strength of either side is not what Xu Jie wants to see. Therefore, Xu Jie increased the anti-submarine power of the British on the basis of the increase in the German submarine warfare capability.

In fact, Xu Jie still has a trump card in his hand, that is, air power anti-submarine. Airships and aircraft are used to monitor the offshore waters. It is even possible to build a seaplane carrier. This kind of thing was really used by the British in the late World War 1 on Xu Jie's plane, although the bomb load of the aircraft at that time was very small, and the bombing accuracy was almost no different from throwing grenades down with your hands, but it could still force the submarine to stay at the bottom of the sea for a long time, and find out the movement of the enemy submarine. However, Xu Jie obviously does not intend to give advice to the British in this regard ......... now.

"At the end of the day. If we want to fundamentally solve the submarine problem, I think advanced underwater acoustic detection equipment is necessary, so for the common interests of the two countries, I hope that the research and sharing of underwater acoustic equipment can be strengthened between the two countries. Hopefully this is what we're working back on. Finally, when the exercise was over, Yang Yonglin finally said to Jericho.

"Technical communication is a must, but I've always believed that if we want to target a weapon, we first have to understand it. According to our technical analysis, the noise of your submarines is less than ours, and we want to find out why. Jericho thought for a moment and said