The I-54 could only dive to a depth of 30 meters, but the sound of a huge deep-water* explosion temporarily drowned out the sound of the motor starting. The submarine tried to escape from the water at an extremely slow speed. The Kinmen Strait is like a long, narrow bathtub for diving, and it is far less easy for submarines to maneuver around than the deep sea. And the density of American warships, again, is so great.

In the distance, citizens on the Golden Gate Bridge saw a huge wave surging behind the destroyer, and then the sound of explosions was heard. It seems that it is not a drill, but a live attack. It is not uncommon for Nazi submarines to visit the East Coast and the ports of the Caribbean, but the Japanese Navy has not done much on the West Coast, and the closest base to the American mainland is in the Aleutians, in fact, in the past two years of the war, they have never crossed the boundary between Aleutian and Pearl Harbor to the Marshalls, but have gone straight to the South Asian resource area, except for a few suspected attacks, only to drop the incendiary material in the mountains and forests of Oregon.

The crowd on the bridge cheered, and the citizens condescended to see as several of their ships were rushing forward, ready to attack the enemy underwater.

In fact, in the crowd that stayed on the bridge, elementary and middle school students made up half of the smaller ones. Having students go to the bridge to see off soldiers to the battlefield is part of the California school department's patriotic propaganda activities. Recently, San Francisco's education system is paying close attention to the implementation of patriotic education, focusing on cultivating children's positive worldview, values and outlook on life.

The students cheered and applauded when they saw the explosion in the distance, but they didn't know how dangerous it was to stay on the bridge at this time. Some vehicles also slowed down to look sideways, causing traffic jams on the bridge.

The chaos in the Kinmen Strait caused chaos for ships in the harbor to leave the port, and huge liberty ships and oil tankers were blocked near the channel and could not enter or exit, and only small warships entered and exited to search for underwater submarines. Of course, the U.S. Navy ships here were all commanded by inexperienced officers, and for a while they made a fuss, throwing dozens of deep water guns everywhere*, but it only added to the chaos in the strait, and no one could be sure that the submarine was sunk.

Still stuck on the I-12 outside the strait, Captain Kanda heard continuous explosions coming from the bottom of the sea, and he knew that the I-54's infiltration plan had been messed up. Saeki was too eager to attack, wanting to infiltrate during the day, the equivalent of Russian roulette, and apparently he was unsuccessful. Now it's the turn of I-12 to make a move and save Saeki's plan.

Onishi's plan only left Kanda with the absolute right to choose the battlefield, but the command was completely attributed to I-54, which was the reason why Onishi sent a Shaozo to sit in I-54.

On the I-12, Kanda ordered to rise to periscope depth and at the same time increase the speed. This is a very risky move, but he must now make a desperate bet to attract the American ships on the side of the I-54. He didn't even know if the I-54 had been sunk by this point, but in any case, the dead horse had to be treated as a live horse doctor.

As the periscope was raised, he had already impatiently turned 360 degrees to check the surrounding enemy. He was frightened by the situation in front of him, on the sea, at least six enemy warships were cruising in the strait, and there were several ships with huge silhouettes in front of them. Visually the nearest is less than a kilometer. There was no time to calculate the current amount of advance, so he ordered the submarine to turn the rudder and roughly aim at the area where the enemy ships were concentrated, and then ordered the launch of *six in the tube*.

*There is no set depth and corner, and it is sent out with a simple sector. Don't expect to hit the target at all, just to attract the enemy's attention. He knew that once the enemy reached him, it would be a nightmarish experience.

Six spears*, fired almost simultaneously at very small angles. With a set depth of 0, the advantage of a smaller oxygen* trail is lost, and they cut through the waves on the surface of the water and gallop towards the depths of the strait. The citizens standing on the bridge couldn't help but exclaim nervously when they saw * extending under their feet. No one thought that the underwater enemy would dare to fight back.

At this time, on the Golden Gate Bridge, due to the sudden deceleration of many cars, several minor rear-end accidents have been caused, and then the traffic is completely blocked, and when the police deal with the rear-end collision, the people in the car (including the passengers in several buses) also got out of the car, squeezed to the side of the bridge, and looked down.

People watched the U.S. warship dodge in a thrilling way. Eventually, all six of them were lost, and they passed under their feet. Everyone on the bridge couldn't help but applaud. However, the track is still extending to the ports in the Kinmen Strait. The machine guns of some Coast Guard ships began to intercept the fire, and several Japanese* in a row were hit by small-caliber ammunition and exploded, but still two rushed to the port, one hit a tugboat with a deep draft moored in the harbor, and one hit the empty berth and exploded. Simply, the damage caused by the two explosions was not too great.

The U.S. destroyers began to swarm towards the launcher's I-12, leaving only two of them and continuing to wait in place.

The navy has deployed many ships for the defense of the port, but there are few plans, and the captains who have no actual combat experience act in a simple way of anti-submarine warfare training. They are like firefighters, they will pounce wherever there is a situation, and the whole anti-submarine will be in chaos.

After the I-12 completed the launch, it made a left rudder turn in the water. Of course, due to the battery-powered underwater speed, the rudder effect is not ideal, and the turning is clumsy and slow. However, escaping from the strait was not Kanda's plan, and he was not sure if Yi 54 had a chance to slip away, so he had to die performing in the strait today.

American naval guns fired at the periscope, but the periscope quickly disappeared into the sea. The first destroyer arrived, and right from the area where the periscope disappeared, it successively dropped deep water *. The I-12 made a timely turn in the sea, causing it to stagger with the bombing area, but there was still * exploding nearby.

The submarine seemed to have been hit hard, and one side of the ballast water tank was flooded. The damage management team dealt with the emergency and quickly entered the water to avoid continuous bubble rise and expose the whereabouts. As a result of this disposal, the Yi-12 has lost 50% of its reserve buoyancy, and the hull has been tilted for a time. The speed drops by 6 percent, and the rudder efficiency is close to 0.

In a hurry, Kanda urgently ordered the single-shaft motor to reverse (another full speed) in order to turn around underwater and avoid the first destroyer. It should be said that Captain Kanda's disposition was far more calm and effective than Saeki Shaosa's.

At this time, through the bulkhead, the rest of the US ships could already be heard approaching, and it was obvious that the Americans would indiscriminately drop deep bombs on the entire nearby water. Although the enemy has a certain blindness in dropping bombs, the incompressibility of water makes the explosive power of deep water* very effective in transmitting to all sides, which makes the killing radius of deep bombs especially large for the old Yi 12.

The U.S. military began to drop bombs. I-12 crawled at the bottom of the sea at a pitiful 2-knot turtle speed. For the time being, this battered submarine can rely on the speed adjustment of the dual-shaft motor to implement steering under certain low-speed conditions. But this requires very careful control.

Kanda listens to the sound of approaching explosions, as well as the sound of enemy engines intermittently in the explosions, determines the enemy's position, and then makes a last-minute decision to adjust the course or not. Evasion and blows are completely unequal, like an old man in slow motion, dealing with a boxing champion who is as fast as lightning.

Several times the dense bombing area of the US military passed by the route of the Yi-12, but each time it missed a bomb, it caused a certain amount of damage to the submarine, and it lost almost all reserve buoyancy. The keel of the submarine hit the bottom of the sea several times, and it was only a matter of time before it was damaged, but the US military still dropped bombs repeatedly. They were no longer able to determine the location of the submarine or whether it had been sunk by listening to the sound, but today, the Japanese had completely angered the Americans here, and they wanted to turn the Kinmen Strait upside down.

Of course, people in the US military still noticed that the periscope that appeared first was 1.5 kilometers away from the submarine discovered later, and it was obviously not the same one, so under the Kinmen Strait Bridge, there were still two destroyers, and eight more Coast Guard gunboats (equipped with 20 mm guns and machine guns) stayed as the last line of defense. It's not easy to get through the defenses.

In the I-54, which has been sitting at the bottom, Saeki realized that Kanda had attracted the enemy's main force away, but there were still several destroyers circling around his head, and the Americans were not stupid, they knew that there were more than two submarines in the strait. Saeki ordered the motor to restart, slowly crawling on the ocean floor at minimum speed. His submarine was in much better condition than the I-12, and when Rabaul was refitted, it underwent major repairs to further reduce the noise of the submarine. Of course, the sound of explosions caused by the Americans throwing deep bombs in the distance is the best cover.

The submarine crawled underwater, slowly blending into the harbor. The water under the Golden Gate Bridge is only 20 meters deep, which is a problem, but now Saeki has to bite the bullet and give it a try.

On the bridge, everyone was excitedly watching the battle in the distance, watching the US Navy beat the underwater enemy. Only a little girl in the second grade was the first to notice something dark moving underwater. It was like an inconspicuous stain of oil on the surface of the sea, or an ugly serpent under the water, but it was moving with perseverance.

The little girl screamed, and then more people followed her point to see the submarine trying to infiltrate the harbor. The Army on duty on the bridge also noticed the submarine cruising at a low speed below, but their telephones and broken radios could not communicate directly with the Navy. The only way to strafe them was to try to get the attention of nearby Navy vessels, and soon the speedboats of the nearby Coast Guard realized that people were sounding the alarm on the bridge and were coming here, but unfortunately there was no deep water on these smuggling boats*. What's more, standing on these ships, it is impossible to see the submarines below,

The Japanese submarine slipped into the harbor slowly and leisurely, in full view of everyone.

The underwater navigation of the I-54, of course, did not allow him to find the right area, and the submarine could only follow the ship in the distance by sound, and finally confirm the position, and it must also pass through the periscope.

The detonation team on the submarine reported to Saeki that all the debugging had been completed and that the nuclear bomb was ready to detonate. Saeki decides to set a 5-minute countdown (the minimum detonation time that can be set) and then surfaces for one last reconnaissance. He hoped that Yi 12 would help him work hard again to fulfill his final plan.