"Alright, brother, don't be ashamed, she's Catherina!" Alma went up and kicked Alan in the stomach, kicking Allen.

After being beaten by his sister and brother-in-law, Alan became honest, but his eyes still swept over Su Fan from time to time, and the flame temperature in his eyes was higher than that of the center of the nuclear bomb explosion, Su Fan wanted to reach out and strangle him to death, but for her own money, she still held her hands.

The luxurious magic crystal car drove to the dock, and several people got on a battered light cruiser with a displacement of about 6,000 tons, and there was a crack under the waterline of the destroyer, but it had been barely blocked with steel plates, and now it was being repaired by some alchemists, and it would not take long to recover, and there were many wounded on the cruiser, some of whom were lying on the deck basking in the sun.

"Brother, what's going on?" Alma asked, looking at the wounded and the big crack in the ship.

"We came this time to send a 6,000-ton cruiser and two 2,000-ton destroyers, but two of them were blown up and sunk by that kind of diving ship on the way, and this cruiser was also injured. Alan looked at the surviving battleship and said, "I sank a diving ship with naval guns, but because the water was too deep to salvage, these wounded were survivors of those two destroyers." ”

"Let's go inside!" Alma opened the hatch of the bridge.

Several people walked in, and in the bridge, several middle-aged people were sitting there, several of them were still wrapped in gauze, these people stood up after seeing Alma, and nodded at her, Alma also returned the salute to them, and after the two sides sat down, Su Fan began to ask.

"Do you agree with my suggestion?" asked Su Fan.

"Let's see how effective this listener of yours is!" said Allen, his hippie smile vanishing and becoming serious, and the temperature of the flame in his eyes changed from a nuclear bomb to a thermobaric bomb.

"You can go and try. Su Fan took out the listening device and put it on the table.

"That's it?" the group of middle-aged people gathered around, observing this little torpedo-like thing, Alan didn't understand this, and didn't move.

"Both Ricco and Alma have used it. Su Fan said, "They should have mentioned it, right?"

"Well, I'm going to use it myself!" Alan said after thinking for a moment.

"Take it, find a place to try it..., by the way, the higher the mechanic's ability, the better this earpiece will work! and...will you use this? This thing needs to be used by someone with experience. Su Fan looked at Allen, who grabbed the listener and was about to leave, and said.

Zuihou is Allen fused this sonar and took a few people to the sea, Allen is a mechanic with three mechanical spirits, but he only has a battleship of more than 50,000 tons, and the remaining two are very strange chariot mechanical spirits, this kind of hybrid mechanic is very rare.

The 50,000-ton battleship anti-submarine is a word, just rely on the heavy body of the battleship to catch up with the flexible submarine, then it's a bit hehehe, this shijie can only use depth charges to deal with submarines, what anti-submarine torpedo anti-submarine missiles are still in a state of floating clouds, seepage bombs are on the way to the submarine, throw them in strings, and sink the submarine with a barrage, but the heavy body of the battleship...

Of course, the anti-submarine effect of the battleship is not very good, but it is still possible to find that the submarine can still do it, Allen's 50,000-ton mechanical spirit body dragged this listener to the sea, Su Fan took the headphones, Allen directly connected to the battleship, Allen let his mechanical spirit move forward slowly.

The sound of the sea is also very messy, and sonars on earth need to distinguish the sounds of submarines or schools of fish from these sounds, and sonars must be honed before they can take up their posts.

"Hmm...what's that sound?' the sound of stones colliding?" Alan closed his eyes and listened intently to the sound coming from the bottom of the sea.

"It's the sound of a school of fish passing by the bottom of the sea!" Su Fan said, this sound is too easy to distinguish, you can hear it with your eyes closed...something seems to be wrong?

"What's this squeaky rubbing sound?" said Allen, who heard a strange sound again.

"That's because you put the line too long, listen to the sound of the sound of the sound device rubbing against the bottom of the sea!" Su Fan looked at Alan with a black line, the water depth here is only more than 20 meters, and this kind of dragged listening device can easily rub to the bottom of the sea, but because the shell of the listening device is very strong, there is no need to worry about being broken.

Allen dragged this sonar around the water and heard some strange sounds, but he couldn't tell anything, and he couldn't be sure whether the sonar was good or bad, so after Su Fan stopped for a while, he suddenly pointed ahead and said: "150 guns, 37 degrees to the left in front, 300 meters away, a high-explosive bomb!"

"What?" Alan wondered.

"If you want to shoot, you'll run!" Su Fan took off his headphones and shouted.

Touch, Allen quickly turned a secondary cannon, and put a high-explosive bomb in the direction Su Fan said, after the gun, Su Fan put on headphones, and continued to listen, the listener is a sound amplifier, if you still wear headphones when firing a cannon or a torpedo collision or something, then the sonar will become Beethoven, as for Allen? He doesn't receive sound through his ears, no matter how loud the sound is.

"What was the bomb just now?" Alan asked, curiously, now that there was one less sound in the sonar than it had just been.

"The school of fish should be a big fish with a body length of more than three meters!" Su Fan said.

"It's a fish, it's a fish! a lot!" Rickor looked forward with a telescope, 300 meters was not too far, and in the telescope, he could clearly see that there were a lot of dead fish floating in the water where the shell had just fallen, and some of them were indeed huge large fish.

It's useless that no one trains sonar, active sonar is better, and you can find a way to make it the same as radar, and you can see it directly with the display screen, but passive sonar can only be heard with your ears, so although you tossed it with Alan at sea, Allen didn't understand the benefits of sonar in the end.

"Why don't you take this thing back first...hmm...forget it, I'll go back with you and teach you how to use it..."Su Fan thought for a while and said, she didn't want to break into the Death Corridor, so this time she decided to go to the Fear Family in person, even if she gave up some interests, and let the Fear Family open her mouth with the emperor, it would be better if she could get the identity of a powerful person.

This cooperation with the Dread family is a good opportunity, the school is independent of the empire, the Dread family is theoretically unspeakable, but the top leader of the school is the emperor, if you can use this sonar, then the dread family has enough interests to move the emperor.

Everyone immediately went back to pack their things, Su Fan gave Alan the theoretical knowledge of sonar that had already been printed, and asked him to see it by himself on the way, after the four people in the dormitory packed up some necessary things, they were ready to leave, Su Fan went to break into the death corridor, and there was no time to specify, although she was still a suspect, she could move freely, even if she left the school, no one stopped her.

"Ekaterina, I'm looking for you!" Just as Su Fan had bought some things that he needed halfway through, and had just left the store, Lu Bu walked over as a young man dressed as something unusual for this shijie.

"I said Lu Bu, we don't have any friendship, right?" Su Fan looked at Lu Bu in front of her, although she wanted to tear Lu Bu to pieces now, but now she has no definite evidence, so let's bear with it for a while.

"I repeat, I'm going to pursue you, you have to say yes!" Lu Bu shouted loudly, the voice was so loud that Su Fan's sonar almost failed, she rubbed her ears, and found that the people around her were looking at them, some boys dressed as students were looking at Lu Bu with angry eyes, but they all recognized Lu Bu's identity, none of them dared to step forward, as for the girls next to them, they looked at the gossip with excitement, and some good people directly slapped their hands and whistled, this kind of domineering male protagonist is very popular with little girls.

"If you like to chase, follow your will, that's your freedom, but don't bother me. Su Fan turned around and left, but the appearance was similar, this Shijie Oriental had nothing to do with the species before her, she just subconsciously had some good feelings, but she was destroyed by Lu Bu just now.

"Don't agree?" Lu Bu waved his hand, and a black thing flew out and landed in front of Su Fan, Su Fan looked down and saw that it was Sten who was lying down and was also shot..., his nose and face were swollen now, and his eyes seemed to have been broken, and he had fallen into a coma.

"What do you mean?" Su Fan was a little angry, although she didn't have a deep friendship with Steng, but she was one of the few ordinary friends of her, and what she didn't like the most was the threat of others, there were too many threats on the earth, and there were shadows.

"Since you don't agree, then I'll wait, wait until you agree, during this period, as long as it's a man who is close to you, it's his fate!" The first few sentences were still talking to Su Fan, and the latter sentence Lu Bu shouted directly to all the people around him, the eyes of the girls around him had turned into peach hearts, and those famous girls were screaming and biting at their boyfriends, learning how domineering others were.