In the Tiger Shark submarine, codenamed 013, the captain Lu Zhan wiped a handful of water droplets on his face, mixed with the smell of seawater, and the sweat brought by the stuffy cabin, there was an indescribable taste.

Most of the crew inside the submarine were shirtless, and the temperature of the temperate sea rose sharply under the scorching heat, and the interior of the submarine became hot and dry, but the sixty crew members, including Lu Zhan, did not put their minds into fighting the temperature. Not far from the pitch-black sea is the main force of the Japanese Combined Fleet, which is also the operational target of the Tiger Shark and the thirty submarines of the submarine group.

Not all of them have the big heart of a genetic person, and the crew who participated in the actual combat for the first time were restless, but a calm and steady captain kept the Tiger Shark in a calm and killer posture.

In fact, Lu Zhan was not comfortable, not because of the tension before the battle, but because the Tiger Shark had been wandering in this sea area for thirteen weeks, and it was supposed to return to the port to overhaul and maintain the submarine, and the crew was on vacation, but just in time for the outbreak of war, there was no way. Since February last year, the Tiger Shark has come to the sea area from Liaodong to the Sea of Japan, tracking Japanese naval warships, reconnoitering Japanese transport routes, and reconnoitering hydrological conditions. Correspondingly, the crew is also a little tired of the long-term tension, these sailors have studied and trained for nearly three years, and they are definitely qualified submariners, and Lu Zhan hopes to give them some rest time after this battle.

Thirteen weeks in a submarine is no easy task, with enclosed spaces, monotonous supplies and entertainment, intense patrols and reconnaissance, and the Tiger Shark would normally be given twelve days off after the combat patrol to refresh their spirits and morale, but not now, the crew still has to cheer up. Lu Zhan is most worried about accidents during the battle due to the decline in morale, although the wages and subsidies of submarine sailors are high, but they also have to spend their lives!

The combined fleet is like a pack of mammoth behemoths. Sailing at an extremely slow speed off Ulleungdo, which is already the Sea of Japan, no one would have imagined that there is a pack of hungry sea wolves under the sea.

It is absolutely unwise to attack surface warships, especially surface fleets, with submarines. The concealment of submarines can be used to sneak up on poorly defended ports, but it is powerless against ships with faster surface speeds. After surface warships were generally equipped with mines and sonars, there were only a handful of cases of submarines sneaking up on warships. When encountering a submarine nemesis such as a destroyer, it is often possible to run as deep as possible, and most of the submarines that were sunk during World War II were made by destroyers.

However, now it is different, the submarine group has the accurate whereabouts of the Combined Fleet, which gathers in the sea near Ulleungdo Island and waits for the continuation of the sea battle after the dark night, although the iron anchor is not lowered. But it traveled at the lowest speed and circled around Ulleungdo. Such a speed is not an obstacle for submarines and torpedoes. In addition, at this time, warships were not equipped with weapons below the sea surface, and mines were being valued by various countries like submarines, and new types of mines were constantly being developed, but most of them were used for port defense and surface blockade. The cruiser detachments and destroyer detachments of the combined fleet carried mines, but they were all thrown into the sea during the blockade of the previous period, otherwise they could have counterattacked.

It was close to two o'clock in the morning of the 23rd. The scheduled attack time was approaching, and the crew's spirits were at their tightest. The long-awaited moment has finally arrived! Although he could only see the battleship Mikasa and a hospital ship, he could faintly see the other capital ships through the periscope.

According to the battle plan, the submarine group would launch a torpedo offensive on the periphery of the Combined Fleet, disrupt the Combined Fleet formation, and then immediately retreat, and then have surface warships strike at it. All of the Genetic Captains have strictly followed this plan. Except for Lu Zhan, he didn't expect this genetic captain to be bold enough to come up with an idea that did not belong to the genetic human head, and this idea made the Tiger Shark the submarine with the greatest results.

Fifteen minutes before the attack, Lu Zhan gave the order to burrow into the circle of the combined fleet. In Lu Zhan's view, the outer periphery of the Combined Fleet consisted of thirteen destroyers, and the inner ring consisted of armored cruisers and battleships, supply ships and hospital ships. In the dark sea, no one will pay attention to the movement under the sea, even if they hear the movement, they can't see it, the Tiger Shark is invisible!

At 1:55 a.m., the Tiger Shark successfully infiltrated the interior of the Combined Fleet and broke through the outer destroyer defense circle, with nine giant ships in front of it. Lu Zhan grinned, the girls are all the prey of Lao Tzu!

At two o'clock sharp, the submarine groups on the periphery fired torpedoes at the slow-moving Combined Fleet, and each Seawolf fired four torpedoes in two parts, for a total of 116 torpedoes to form a saturation attack on the Combined Fleet.

The Tiger Shark under the inner sea surface seemed to be able to feel the torpedoes whizzing past the side, which was passing through the middle of the destroyer detachment, Lu Zhan was shocked into a cold sweat, if it was hit by his own torpedo, it would be troublesome, now it seems that the Tiger Shark has become the prey of the submarine brigade like the United Fleet!

"Boom!" Violent explosions sounded one after another, the first wave of attacks launched by more than a hundred torpedoes of the submarine group achieved fruitful results, the Japanese destroyers on the periphery were hit eight, the 533 mm caliber torpedoes were too perverted for a destroyer, only one was needed to completely sink the destroyer, and a destroyer with a displacement of 1000-2000 tons was not worth mentioning in front of such heavy torpedoes.

It was to be expected that most of the destroyers were sunk, and the hit rate would have been higher if it weren't for the shady nature of the attack. But what was even more surprising was that the Asama armored cruiser was hit by two torpedoes drilled into the belly, and the Asama exploded violently, and the power brought by the torpedoes raised the Asama, which had a displacement of nearly 10,000 tons, by five meters, and sank under the water shortly after falling heavily on the surface.

The state-of-the-art armored cruiser Ibate also suffered misfortune, as a torpedo hit the stern of the Ibate, completely destroying the propeller and causing the Ibate to lose its ability to maneuver.

The Japanese Navy reacted with an astonishing speed, and from hearing the first explosion, to the time the Iwate was hit, it took less than a few minutes to get into combat shape and begin to take measures. The wounded Iwate began to stop the loss, and Togo and other generals began to issue orders, because it was not clear who the enemy was and where the enemy ships were, but only ordered the crew to be ready for battle.

When Mikasa's flagship was also hit, the combined fleet finally discovered that the enemy was coming from below the surface of the sea, and the flames from the violent explosion allowed the sailors to find traces of torpedoes, but Mikasa was too close to dodge, and other warships did not have time to go to the rescue, so they could only watch as two torpedoes hit Mikasa in the center.

These two torpedoes were the masterpieces of the Tiger Shark, and in order to ensure the sinking of the Mikasa, Lü Zhan ordered the torpedo crews to launch a second wave of two torpedoes to make up the fire. In fact, the second wave of Lyu Zhan's attack was completely unnecessary, the first wave of two torpedoes tore through the Mikasa waterline armor and caused two huge holes, not only destroying the boiler room, but also allowing the Mikasa to drink enough seawater in less than ten minutes, and the battleship finally tilted fifteen degrees, which made the Mikasa completely incapacitated.

Heihachiro Togo was pushed to the ground by the shock wave from the explosion, but was not injured, and he immediately realized that the fleet was under attack by submarines, and there were many submarines. Two doubts come to mind, one is that the Russians do not have submarine forces in the Far East at all, where did the submarines that attacked the combined fleet come from? Second, submarines have such great power, how did they find the combined fleet? And how did you launch such a unified and efficient attack?

Submarines are not a new thing, for Togo, who always pays attention to the development of the world's navy, he has a brief understanding of submarines, which are weapons, and there are several in the Japanese Navy, but they are all used to protect ports.

Before they had time to think about it, the slowly sloping Mikasa and the flaming Iwate made Togo understand that he had to take measures to find the enemy submariners to counterattack, otherwise the combined fleet would be sunk one by one!

"Your Excellency, please transfer the flagship, the Mikasa is about to sink!" Sotaro Misu also reacted from the violent explosion and suggested to Togo. Togo is also not a stubborn person, and at this time it is better to transfer the flagship and command the fleet to counterattack.

Japanese sailors spotted the torpedo fired by the Tiger Shark, and then the Tiger Shark lurking underwater, and the flaming and slowly sinking battleship around it provided light for the Japanese sailors, and the searchlights were turned on. It's a pity that the Japanese generals suddenly found out that they did not have weapons against this submarine! There is also no experience in dealing with submarines in the mind. The Yakumo armored cruiser reacted the fastest, using rapid-fire guns of various calibers to shoot at the Tiger Shark, and waves of water rose on the water.

"Dive quickly!" Seeing that the situation was not good, Lu Zhan immediately ordered, and when the Tiger Shark was only about five meters above the water when the attack was launched, several 152 mm rapid-fire cannon shells fell on the water above the submarine, which immediately caused the Tiger Shark to shake violently, and the hull made a squeaky sound, which made the crew scattered.

Fortunately, the rapid-fire cannon did not fire armor-piercing shells, and the Tiger Shark was able to successfully dive fifty meters under water and dodge the blow from the water, but after that, Lu Zhan did not dare to let the submarine float to join the battle, but turned around and retreated in the direction of Zhoushan. (To be continued.) )