As the advanced nuclear submarine of the Soviet Union, the equipment of the 949 class nuclear submarine is very advanced, and in the underwater, in the world of completely relying on sound, the 949 class is also fully equipped, it has a total of four kinds of sonar, including the "shark gills" type active/passive medium and low frequency search and attack hull sonar, the "shark rib" type passive low-frequency side array sonar, the "rat roar" type active high-frequency attack hull sonar, and the "pyramid" type passive very low frequency towed line array sonar. Pen, fun, and www.biquge.info

These sonars can provide full visibility from the front and side, but, like all submarines, the 949 class cannot detect the situation directly behind itself, where even if the deployed sonar and the noise of the tail propeller agitating the seawater, the 949 level will not receive any sound from the rear, all of which are noise.

This is a congenital defect of submarines that cannot be overcome, so Soviet submarines at the peak of the Cold War confrontation will adopt a common tactic. The Americans call this tactic the stupid Yankee, and the other name is called the crazy Ivan!

Since neither the bow sonar nor the broadside sonar of the submarine can detect the sound source of its own tail, in order to make it possible to hear the sound of the tail, there is only one simple way: steering!

If it is an early submarine with only bow sonar, this turn will be 180 degrees, and a sharp turn will make the rear tracker unable to react, and a 180-degree turn may also make the rear tracker rush to the front, thus becoming prey, you know, most of the early torpedoes are tail tracking, and whoever occupies the position of biting the tail will win.

And now, equipped with the broadside sonar, the submarine only needs to turn 90 degrees, and then it can use the broadside sonar to aim at the original rear and observe! In order to make the rear unable to react, this steering must be fast, so the next sharp turn at full speed is the most correct choice!

And this action, the reason why it is crazy, because the submarine that is not tracked behind is good to say, if there is, it is easy to collide underwater, this is a precedent, ten years ago, the American SSN-639 "Humphead" nuclear submarine collided with the Soviet Echo 2 nuclear submarine, fortunately there were no casualties on both sides.

After the fact, the American submarine continued to track the Soviet submarine, and the Soviet submarine also continued to use the tactics of Crazy Ivan, which was the mission of both sides.

In reality, although there is a towed body sonar, it is very dangerous to carry such a thing in the tail at full speed, and the towed body sonar is only used to detect targets in the cruising state.

The 949-class submarine, sailing at full speed, almost every hour, makes a turn to check the situation in its rear.

You know, the noise at full speed makes it impossible for Class 949 to hide their whereabouts, and although it has the effect of a density jump, Nirgayev is also a cautious person.

"Left full rudder." Nirgeyev gave the order.

"Understood, left full rudder." The helmsman operated the turbine and made two turns.

The rudder surface of the tail was turned, and the submarine at a high speed of 30 knots, the hull of 16,000 tons, turned sideways, stirring up a large amount of water and making a new sound.

The starboard sonar on the left side, which had long been turned on, was aimed at the rear as it turned.

The sonar had been listening intently, and at that moment, he heard a familiar submarine.

"Los Angeles class! Distance one! One hundred and fifteen deep! Speed thirty-three! The sonar officer shouted.

Damn the Americans! Hearing this, Nirgeyev, who had always been calm, was also stunned for a moment, and then he shouted: "Quick, the first part is drained, and it is urgently floating!" ”

The underwater world is three-dimensional, and in addition to playing against each other on the horizontal plane, you can also go up and down! The emergency ascent of Nilgaev is not to rise to the surface, but to float a few tens of meters, and both sides can avoid it!

If both parties have a tacit understanding, they float up and the other party dives, then they can be avoided instantly!

However, Nirgeyev guessed wrong.

"Quick, the first part is drained, and the emergency floats up! The propeller is reversed and the car is reversed at full speed! When he heard the sonar's report that the other party actually came to a crazy Ivan at this moment, Collison was immediately shocked, and then, he gave his own order, float up!

The captain invariably chose to urgently float, and there is a reason for this, after all, for submarines, they will face the threat of death at any time, and no one wants to sink to the bottom, and floating is the first choice!

The seawater in the first part was discharged, and suddenly the first part was lighter, and the huge hull began to tilt upward, and at the same time, the propeller in the tail began to reverse in the sound of the huge gear teeth.

If you want to reverse in the water, you have to rely on the propeller to reverse, but due to inertia, the submarine is still moving forward!

Hopefully it will be staggered! Collison was almost going to draw a cross on his chest.

"Boom!" At this moment, a loud sound spread throughout the submarine.

If you can observe it from the outside at this time, you can see that the two submarines that are about to float at full speed are sailing upwards at an angle, and there is a close contact!

The 949-class nuclear submarine has a large and bloated hull, and its mass is almost twice that of Los Angeles, so its underwater maneuverability is not strong, but it first discovered the situation, emptied the first part of the seawater, and it did not slow down, so it was equal to the Los Angeles class behind.

And the Los Angeles class, if it didn't slow down just now, it hit it directly according to the first half of the 949 level, this slowdown, or played a certain role, so that its first part, and the front of the 949 level, but still did not get rid of the bad luck, the shell of the Los Angeles class conning tower, hit the 949 level is the rear below!

If it collides in the front, both sides have to sink, although the 949-class double-hull submarine has good sinking resistance, but in the front non-pressure-resistant shell, it is equipped with P700 missiles! Once this missile is ignited under impact, the consequence is almost an earth-shattering underwater explosion.

And now, Los Angeles has hit the rear of 949, and the enclosure of the conning tower collides with the belly of the tail of the 949 class, and as a result, Oscar's huge hull has moved two meters horizontally! And this Los Angeles-class, after the conning tower hit the hull of the 949 class, it knocked the outside non-pressure-resistant hull into a big hole, and at the same time, it also stuck on it!

The turbulent sea poured in along the cracked conning tower in Los Angeles.

"Perform a damage management inspection!" On the 949-class nuclear submarine, Nirgaev is also giving orders, the collision just now has happened, how the Americans are not in his hands, he needs to protect his submarine, the collision just now is extremely violent, what happened to his submarine? (To be continued.) )