Weng Tongyi hurriedly said: "You say, what conditions?" ”

Lin Yuan smiled: "Didn't you tell the Holy Lord that you want to retest my article?" All you need to do is let the Holy One forget about it, and I'll help you get food for the victims. ”

Weng Tongyi thought for a while and asked, "What did that old Xiucai surnamed Li say that your article was written by him?" ”

Lin Yuan thought to himself: "It's better to hide something from him." So Lin Yuan said: "Do you really believe that old thing, what if he is lying to you?" ”

Weng Tongyi didn't know who to trust for a while, so he had to say: "Don't care about these for now, I believe that you are it." ”

Lin Yuan came out, found Shen Wanqing, and asked, "Has anyone come to you again recently?" ”

Shen Wanqing said: "Even if they come to me, I'm not afraid, I won't go out now, they can't find me at all." ”

Lin Yuan smiled: "I'll take you out of the city to hide, how about it?" ”

Shen Wanqing asked, "Where are you going to take me?" ”

Lin Yuan said: "There has been a locust plague at the junction of Shandong, Zhili and other four provinces, and now there is a great famine, I will take you to find food." ”

Shen Wanqing asked, "Grain?" Where do we go to find food? ”

Lin Yuan said with a smile: "When we arrive, you will know the way." The two of them set off overnight, and at dawn Shen Wanqing found out that they had come to Cangzhou Mansion.

The prefect of Cangzhou Mansion had never seen such a high-ranking official as Lin Yuan coming, so he hurriedly opened the door to greet him, and Lin Yuan said, "Take us to the fishing village by the sea." ”

The prefect hurriedly led the way and took Lin Yuan and Shen Wanqing to a fishing village by the sea, and Shen Wanqing asked, "Do you want to use the fish in the sea as food?" ”

Lin Yuan smiled and nodded, and then the prefect interjected on the side and said: "Lord Lin, please forgive the little ones, the fish caught by these fishermen will be enough to feed their own family, if you expect them to catch more fish and use them as food for others, I'm afraid you can't count on it!" ”

Lin Yuan didn't care, and said, "You don't have to worry about this, go and find the most experienced fishermen in the fishing village." ”

According to Lin Yuan's request, the prefect found a few gray-haired old men, these old people were bent at the waist, wearing patches and patches of clothes, obviously the family was very poor, Lin Yuan asked: "How many fish can you catch in a day?" ”

A fisherman replied, "It's less than 20 catties, and it would be nice to have 10 catties except for the fish bones and internal organs that can't be eaten." ”

The prefect frowned and asked, "Why is it so much!" ”

The fisherman replied: "The old man doesn't know, this school of fish is underwater, how can we know where they are on the water, we can only rely on the experience handed down by our ancestors, go to those places where there may be more fish to try their luck, if you are lucky, you can catch more, if you are unlucky, you can only drink the northwest wind." ”

The prefect said to Lin Yuan: "My lord, look, the little ones just say that they can't catch many fish." ”

Lin Yuan instructed the fisherman: "It's morning, most of you shouldn't have gone out to sea yet, you go and organize them into a team, and I'll take you to catch fish." ”

The news of Lin Yuanlai has been known by the prefect of the county, Li Zheng, so they are all near Lin Yuan, obey the arrangement, and at this time, as soon as they listen to the order, they act quickly, and immediately gather more than hundreds of fishing boats from several nearby fishing villages and sail away from the harbor.

Lin Yuan and Shen Wanqing were in separate cabins, and Shen Wanqing smiled: "I know what method you are going to use, you want to use the sonar on the Beijing ship to detect fish, right?" ”

Lin Yuan replied, "Your guess is right, but I need you to help me mark the location." "I handed her a chart and a pencil.

Shen Wanqing marked their current location on the chart, and Lin Yuan turned on the communicator and notified the Beijing ship.

According to the original plan, three helicopters took off from the Beijing ship, each of which carried a towed sonar, which is a kind of sonar, but the installation method is different from that of the fixed sonar, which is installed inside the hull, such as the bulbous nose bow widely used in modern warships, in which the transmitting and receiving base array of the sonar system is installed.

The towed sonar is that the sonar itself is in the sea and is fixed on the warship or helicopter by the towing cable, which can reduce the adverse impact of the noise of the warship or helicopter on the sonar.

Three helicopters detect schools of fish near Lin Yuan from three directions, for the sonar operator on the helicopter, it is the first time to use sonar to find fish, and they used to use sonar to detect enemy submarines and mines, but the principle of finding fish and finding warships and submarines is the same, and soon, there is an obvious echo on the sonar echo display.

But the sonar operator can't tell right away if it's a school of fish. Because he knew that these could also be reef groups, he waited a while for the sonar system to determine if the target had velocity.

Whether it is radar or sonar, the way to detect whether the target has speed is the Doppler effect, that is, when the wave source moves, the receiver will find that the frequency of the wave will change, and soon the operator will find the change in the frequency of the echo, and he quickly contacted Lin Yuan: "Captain, find a school of fish!" The azimuth is 0025, and the distance is 0.8. ”

In order to facilitate the indication of the direction, the position of the fish reported by the operator has been converted to the direction relative to Lin Yuan, that is, the fish are located in the direction of Lin Yuan's 25 dense positions, and the distance is 0.8 kilometers.

Shen Wanqing immediately marked the location of the fish on the chart, Lin Yuan immediately ordered the fleet to turn in the direction of the fish, the fishing boats were powered by sails, the crew immediately adjusted the direction of the sails, and the fleet began to move towards the position of the fish.

Every ten minutes, the operator would report the location of the fish to facilitate Lin Yuan's tracking, but after thirty minutes, Shen Wanqing said, "There seems to be a problem." ”

Lin Yuan hurriedly leaned over and asked, "What happened?" ”

The chart was covered with grids, each representing a certain distance, so the distance could be roughly inferred from the chart, Shen Wanqing said: "Although the distance represented on this chart is not very accurate, I can also see that the speed of the fish has increased." ”

Without Shen Wanqing saying more, Lin Yuan understood what she meant, the acceleration of the fish means that their speed will exceed the speed of the fishing boat, so no matter how they chase it, it is impossible for the fishing boat to catch up with the fish.

At this time, the fishermen did not know the situation, and their faces were full of joy of harvest, and these boats used trawl nets when fishing, and the nets were fixed to the hulls of the boats, and the fishing boats dragged the nets forward and collected the fish in the nets.

But when these trawls are not in use, they are collected in the boats, and the fishermen know that the fish are ahead, so they take out the nets and prepare to release them into the sea.

But now the fish are about to speed up and flee, which will not only disappoint the fishermen, but Lin Yuan's plan will also be devastated, Lin Yuan did not expect that the speed of the fish will be faster than their fishing boat, Lin Yuan said to himself: "What should I do? ”

At this time, the sonar operator on the helicopter also noticed this problem, and in the communicator, he said anxiously: "Captain, what should we do?" Why don't we drop a few depth charges and kill all the fish. ”

Lin Yuan said: "This is definitely not good, the power of depth charges can kill how many fish!" ”

Shen Wanqing spoke on the side: "Why are we going to find fish?" Why not let the schools of fish come to us? ”