Sun Dehai said: "Although we detected this signal before, but this signal has always been far away from us, so we didn't care, but today is different, this signal is very close to us, almost only more than 20 kilometers!" ”

Lin Yuan's heart moved, and said, "More than twenty kilometers? Isn't that on the sea? Then there must be a ship using radio, and now the radio is still military, then this ship must be an enemy ship, we have installed a radar on the top of Longtou Mountain in Port Arthur, and it is impossible for a suspicious ship not to detect it! ”

Sun Dehai said with a smile: "There are so many ships passing outside Port Arthur every day, and it is impossible for the radar station to verify the identity of every warship. If you want to find this ship, it's better to climb to the sky! ”

Lin Yuan said: "I have a way, our radar has a record of the ships coming and going, you give me the time and distance of receiving the signal, I will take this time and distance to the Longtoushan radar station, and call up the records of the ships coming and going, and see the distance from them to you at the time of sending the signal, and the ship with the same distance as you give me is the ship that sends the signal!" ”

Sun Dehai thought for a while and said: "Your method is theoretically feasible, but it is very difficult to operate, because the other party's signal transmission time is very short, so we estimate the distance when the error is very large, in the range of plus or minus five kilometers, that is, the distance you want to check is fifteen kilometers to twenty-five kilometers, you calculate yourself, how many ships will there be in this range?" ”

Lin Yuan nodded and said, "I know the truth, you give me the time and distance first, and leave the rest to me."

Sun Dehai tapped a few times on the keyboard, and then said to Lin Yuan: "The moment when the signal was received was 10:47:15, the signal lasted for 17 seconds, and the end time was at 10:47:32. ”

Lin Yuan took out a small notebook, recorded the time and distance information, and then asked, "Then has this set of signals been deciphered?" ”

Sun Dehai shook his head helplessly and said: "It's difficult, first of all, the number of ciphertexts we get is too small, and it is difficult to analyze the frequency of the occurrence of the symbols, and secondly, we don't know what language the other party is based on, so even if the frequency of the symbols is analyzed, it is difficult to analyze the meaning of the symbols." ”

Lin Yuan said: "Okay, you can monitor this signal first, and then tell me when it appears later." After Lin Yuan finished speaking, he came out of the house, thinking that Longtou Mountain was far away from here, so he found an off-road vehicle and drove it to Longtou Mountain.

Lin Yuan was driving on the road, and suddenly saw a woman sitting on the ground with her back to him, her shoulders shrugged, as if she was crying, Lin Yuan thought: "Look at this back is quite familiar, but I can't think of who she is?" I don't know what sad things she saw when she met Lu, why did she cry here? ”

Lin Yuan parked the car aside, got out of the car and walked towards the woman, the woman turned around when she heard the footsteps, and glanced at Lin Yuan, both of them shouted in surprise: "Why are you?" ”

It turned out that this woman was Lin Xuezhi who Lin Yuan rescued from Toushanman's hands, she immediately burst into tears and laughed when she saw Lin Yuan, ran to Lin Yuan and said with a smile: "Brother, why did you get here?" ”

Lin Yuan raised his hand to wipe the tears on her face and asked, "You still ask me, I still want to ask you, why are you hiding in the bushes and crying alone?" ”

Lin Xuezhi's eyes turned red again when she heard this, and she muttered, "I feel so wronged." ”

Lin Yuan hurriedly asked, "What happened?" ”

Lin Xuezhi hesitated for a long time, then handed a piece of paper to Lin Yuan and said, "Look at it yourself." Lin Yuan took the piece of paper and looked at it, only to see that there was a large list of names on it, Lin Xuezhi's name was ranked first, Lin Yuan asked, "This is a list, right?" What's the list? ”

Lin Xuezhi cried and said, "Didn't you ask me to teach at the agent training base?" It turned out that after Lin Xuezhi surrendered to Lin Yuan, Lin Yuan arranged her in the agent training base, and usually taught the students when there was no task, and went to perform the task when there was a task, so Lin Yuan smiled and said: "That's right, what's wrong?" ”

Lin Xuezhi wiped her tears and said: "This list is the 'worst teacher ranking' summarized by the students, and the one who ranks first is the worst ......."

When Lin Yuan heard this, he laughed and said, "I thought it was a big deal......

Lin Xuezhi said coquettishly: "Brother, you are still laughing, I prepare for class late every day in order to do a good job, but the students actually talk about me like this, I ......" and cried as she spoke.

Lin Yuan said softly: "Okay, okay, don't cry, what kind of class are you teaching?" ”

Lin Xuezhi said: "Introduction to intelligence work. ”

Lin Yuan said: "The students are not serious about this kind of class, they all think it is useless, okay, let's not talk about these things, I will take you to the beach to relax." ”

Lin Xuezhi shook her head fiercely and said, "No, I want to go back to prepare for class, I will definitely not let them talk about me like this again!" Lin Yuan looked at her determined appearance, and couldn't help but think of the scene when she struggled out of the snow-covered woods, and thought, "What a stubborn girl." ”

Lin Yuan was just about to say goodbye to her, when suddenly it rained heavily in the sky, Lin Yuan hurriedly opened the car door and said, "It's really strange this year, it's raining in winter, it's still far from the agent training base here, if you walk back, you will definitely be drenched, hurry up." Lin Xuezhi got into the car, got in the car and asked, "Where are we going?" ”

Lin Yuan said with a smile: "Go to the radar station in Longtou Mountain." Lin Yuan drove all the way forward, and soon came to the bottom of the mountain, showed the guards his ID at the door, and the two went up to the top of the mountain, Lin Yuan found the stationmaster and said: "I need to retrieve the situation of the ship that is 15 to 25 kilometers away from the base at 10:47 this morning." ”

The stationmaster replied happily: "I see, it's a trivial matter, I'll transfer it to you, you wait for a while, if you feel bored, you can go and see the sea view outside." After speaking, the stationmaster went to another room, and after ten minutes, he beckoned: "Okay, I'll take out the ship!" ”

At this time, Lin Xuezhi was still looking at the Lang flowers on the sea with interest, Lin Yuan came to the room alone, and the responsible comrade pointed to the computer screen and said: "There are a total of forty-five targets that meet your requirements, and we have record and spectrum information for forty-four of them, they are all cargo ships departing from Yingkou Port, and there is only one ship that we have not recorded." ”

Lin Yuan frowned and asked, "No filing?" Why is there no record? ”

The stationmaster smiled: "You see that the radar reflection area of this ship is relatively large, it should be a fisherman's sailboat, and there are too many fishermen's sailboats, so it is not surprising that there is no record." ”

Lin Yuan suddenly thought, "Didn't Feng Lao Liu's boat leave this morning?" This ship might be his ship. At this moment, I heard the guards outside running in and saying, "Report to the stationmaster, it's not good!" Something happened! ”