In fact, they had long thought about this situation, but they didn't expect it to happen so quickly, and there was a sudden abnormality before they reached the coordinate point.

"What do we do now? Is it the first strike? "I'm not sure exactly what it is, but the ghost still thinks something should be done.

"There is no other threat found, we need to confirm what it is, make no mistake, it will be troublesome if there is any movement to arouse the suspicion of the enemy, the situation in this vicinity is unknown, it is better to be careful, but even if it is an enemy, how can they determine where we are coming from? Don't get too nervous. Cuttlefish said.

"Are you naïve? We made such a big fuss at the Tivia Pier, how could the 'Clock Tower' not know? What's more, in the follow-up actions we took, we also used the kidnapping of their employees as an excuse to delay time, and it has been a few days, how can they be so slow to react? Still don't know what's going on? The ghost said.

"It's true that we can't act rashly now, even if they know what is going on over there, it will take time to confirm our identity, how do they know that this submarine is coming from that side?" The griffin sensed that the cuttlefish was right.

"If you want to find out if it's an enemy submarine, you have to go further, we haven't reached the coordinate point yet, should we lean over now?" The cuttlefish asked, apparently cautious and not going to move on in a daze.

"We get that place while paying attention to the surroundings and seeing if there's anything else." The griffon said.

"Do you think so too?" The cuttlefish asked the crab claws, after all, they were a gang, and they couldn't blindly listen to outsiders.

"What else can we do?" The crab claw smiled wryly, and it was clear that he couldn't make up his mind either.

"Just reduce your speed and stay maneuverable, keep going, and use the passive sonar system to continue collecting signals." The cuttlefish knew they had no choice but to give up and go back now, but it was clear that this was impossible.

The submarine continued to move forward, not very fast, and it didn't take long for them to confirm that what they had discovered earlier was indeed a slightly smaller submarine.

"The voiceprint characteristics that do not belong to any kind of submarine that we have mastered should not be our own people." The sonar soldier said very cautiously, in fact, the possibility of encountering friendly forces in this kind of place is extremely low, but they still have to be cautious to confirm, in fact, it is just the use of sound recognition technology to determine the identity of the other party, each submarine has a different shape, the engine and various mechanical moving parts inside are very different, resulting in the sound of the submarine to the outside is bound to be different, which is the main basis for changing the enemy submarine underwater.

The voiceprint of the submarine is the main means of identifying friend or foe in underwater submarines. In the dark ocean, you can make further judgments by identifying the sounds of different submarines, but it is difficult to obtain the voiceprint characteristics of submarines in other countries, but it is easy to know the voiceprint characteristics of all submarines in your own country.

The passive sonar equipped on the submarine does not emit active sound waves, but passively receives the radiated noise generated by the underwater target and the signals emitted by other underwater acoustic equipment to determine the orientation of the target.

The principle of operation is roughly equivalent to the reception process of active sonar, but the processing of the signal is different. Modern passive direction finding sonar usually adopts two systems, multi-beam and single-beam, and can also use several groups of hydrophones with large spacing to form a linear base array, which can also passively determine the distance of the target while determining the azimuth of the target.

"Did we find out too?" Heavy Punch asked, in general, in this case, it is not difficult for the two sides to find each other, and they both complete the voiceprint search through similar equipment, although they cannot determine their identity, they can determine the direction, location and distance.

"It's a long way off, and our passive sonar system is very sensitive, and they probably haven't noticed us yet." The sonar soldier said.

"Can't tell what type of submarine it is?" The cuttlefish frowned and asked, "Our newly replaced sonar system should include the voiceprint characteristics of many of the world's major conventional submarines, and it is impossible to judge the origin of the other party?" ”

"It's going to take time, I'm re-contrasting, it's too far away, the echo is too weak." The sonar soldier said helplessly.

"Turn off the power system, keep only the passive sonar, stop moving forward." The cuttlefish doesn't plan to continue the adventure, and who knows if there are other submarines ambushing around here? It's better to be cautious, now they are still some distance from that coordinate point, but they are unobstructed in the ocean, and they can basically be said to be very close.

"The exact location has been calculated, and the location of the submarine is not far from the coordinates we are going to reach." It was reported.

"This is too obvious, it shouldn't be an ambush, is it a bait?" The ghost frowned and said, "But do you still need bait in this kind of place?" That doesn't make sense, does it? ”

"It's not normal." You can't figure out what the hell is going on, why the enemy is arranging it this way, is it to warn them, or is there some other purpose?

"Why do you care so much about him? Lock on to the target first, and sink it if it doesn't work. The crab claws said fiercely.

"Are you sure he's the submarine of the Clock Tower?" The cuttlefish asked rhetorically.

"Of course I can't be sure, what's wrong?" The crab claws didn't understand.

"It's so light, if you really sink it, and then find out that it belongs to a certain country, you will bear the responsibility?" The cuttlefish rolled his eyes, "Nonsense, when you don't look at it, this is the high seas and oceans, anyone can come, but you can't sink whoever you want." ”

"At this time, we have to be ready for all kinds of situations at any time, if it is a trap, there must be more than one submarine, and when you figure out the situation, you may not even have a chance to counterattack." The ghost was very supportive of the crab claw's opinion.

"A bunch of goods who don't have a backache when they stand and talk." The cuttlefish shook his head, "You don't have to be responsible, do you?" ”

The ghost really doesn't have such concerns, after all, he doesn't need to explain to anyone, this kind of thing is done for him, there is nothing to consider, let alone scruples.

"It's a nuisance." Heavy Punch didn't know what to do next, he had considered any possible situation, but he didn't expect the other party to blatantly wait for them, which really made him feel a little unexpected.

"Let's wait and see, there's nothing else you can do." The griffons couldn't figure out what was going on.

"Float up to periscope depth." Cuttlefish said.

"What are you doing? Really not afraid of being discovered? The ghost thought there was something strange about his actions.

"We have to confirm if there are other ships in the surrounding waters, we have to accept satellite signals to determine if there are other potential threats in this area, we must have a safe range, if there is only one submarine, it is not difficult to deal with, in case more comes up, it will be troublesome, are you going to be trapped in this sea area and can't get out?" Cuttlefish said.

In terms of sea operations, especially submarine warfare, their experience really can't be compared with the cuttlefish, and they don't know what to do is right, the cuttlefish seems to be the way, and they can't find any reason to oppose it, so they can only do it by him.

On the analysis of data fed back from satellites, they found that there were only two freighters within a 100-nautical-mile radius, and that there were no other suspicious vessels, and that there were no other discoveries other than the submarine within their detectable range.

"Get in touch with them and tell us we're here." Heavy Punch thought about it, and didn't know what to do, so he planned to get in touch with the 'Clock Tower' to see if he could get more information from the address book.

"If they knew where we were, do you think he would give us further orders to tempter and wouldn't lie to us?" The ghost doesn't think it's a good idea.

"What if you know? At least the submarine that we're safe now doesn't pose an effective threat to us, so we need to figure out what to do next? Or is there any plan for them, even if the 'Clock Tower' wants to ambush us, they have to let us into their encirclement, but that submarine wants to deal with me? Still so blatant, how likely do you think he is to succeed? Although it was not clear what was going on, it could probably tell that it could not be an ambush as they had guessed.

"Alas, you have a point, you're right, I can't refute it." The ghost shrugged.

The worm immediately took the captives for a new round of calls, but as usual, there was no immediate reply, and they could only continue to wait.

"They seem to have spotted me, and they've turned on active detection." The sonar soldier reported.

The enemy's actions made everyone present unable to react, and for a while they couldn't figure out what was going on, and the cuttlefish immediately took a series of countermeasures, but the enemy's behavior was indeed somewhat unexpected.

Although the active signal can be accurately detected, but the same drawbacks are obvious, even if the submarine is very advanced and silent, but the transmission of the active detection signal is basically equivalent to suddenly turning on the flashlight in the dark night to observe the target, you can clearly see the other party at the same time, but also expose their own position, so this detection method has advantages and disadvantages, it depends on whose technical level is higher, who can effectively grasp the opportunity, but the enemy's abnormal behavior seems to be completely indifferent to their position exposure.

"They just probed us, they didn't lock it down, and they behaved abnormally." The sonar soldier is quite strange about what the enemy wants to do, if the other party wants to kill them, he should immediately lock on and fire torpedoes at them after turning on active detection, but the other party doesn't seem to plan to do this, just want to see where they are, this behavior is not a little abnormal, it should be said that it is quite abnormal, there is nothing to doubt.

"I don't think they're probing us out of curiosity, are they?" The ghost suddenly said this.

"Don't you think this curiosity is lacking? Would you be so curious about enemy submarines that you would not hesitate to reveal your location? Cuttlefish said.

"We already know where he is, does it make any difference if he's exposed or not?" The ghost said unconvinced.

"Did they know we had discovered it before they turned on active detection?" The cuttlefish asked rhetorically.

"Are you saying they didn't even know they had been discovered, and instead turned on active detection to determine our location? It's just a little lacking in the heart. The ghost understood what he meant, but felt it didn't make sense.

"That's the problem, you can't do this kind of heartless thing, but our opponents are doing it clearly, it seems that they are not worried about being discovered by us, could it be that they have already arranged it and can kill us at any time? That's why it's so blatant? "The insects are also puzzled, and the enemy's behavior is too abnormal to understand.

"If you want me to see that they either lack the heart and eyes, or they don't take us into account at all, maybe they think we can't make any big waves here." Crab Claw said.

"It's just a submarine, it's not so blatant, is it? Could it be that their submarines are advanced and can ignore any threat? Or is there enough of it around and it doesn't care if we attack suddenly? "The cuttlefish is also dizzy.

"So what do we do? Is that all there is to it? "Ghost didn't think it was a good choice.

"Back off." The cuttlefish finally made a decision, and felt that it was really inappropriate to wait here.

"Escape?" The ghost asked.

"It's circumvention." The cuttlefish corrected.

Obviously, the other party didn't expect them to take the initiative to dodge, and the other submarine actually followed slowly, but still kept a distance, did not get too close, and was not thrown off by them.

"His grandmother's, this is too shameless, don't you think we are easy to bully?" The ghost yelled.

"Go around in circles and see how they react, and by the way, see if there are any other threats around." The griffon said.

"What if there is an ambush? Should we get out of here first? "The crab claws are worried.

"There is nothing to hide in this ocean, there is nothing else around except sea water, even if there is an ambush, there must be a place to hide, don't let me see this submarine pestering us, it seems that there is nothing else." "The situation is still unclear, and it's not a good choice to get out in a hurry, so it's better to turn around and take a look, and one can determine what this submarine is going to do?" The other one can really detect the surrounding seas. ”

Since the people in charge of driving submarines have said so, others have no other opinions, after all, they are professionals, and since the professionals have expressed their positions, then they have not said anything.

The submarine circled around the coordinate point and began to circle around, and the submarine behind it followed unhurriedly, always turning on the active sonar, seemingly trying to accurately judge their whereabouts.

"It's pretty close." The cuttlefish looked at the distance between the two on the screen and frowned.

"I've always felt unsure." The ghost felt furious in his heart.

At this moment, the alarm in the vestibule suddenly sounded, followed by the alarm lights flashing non-stop, and the sonar soldier's face changed: "They are locking our ...... with the fire control system"