Sonar is not reliable.

The submarines of this era were not very quiet, and it was impossible to reach the level of oceanic black holes in later generations. I won’t mention the pump spray propulsion, and the basic seven-blade large-side inclined propeller cannot be made, so there must be noise.

However, in comparison, the performance of sonar is also lagging behind and lacks advanced electronic technology. The range of sound that the sonar can hear is very small and there is also a lack of analysis and processing methods, so it is normal for the sonar to not hear the noise of the submarine.

At this time, it is very important to have more lookouts and search the sea surface carefully. What if the lookouts can discover the snorkels and periscopes on the sea surface?

This is the same as setting up observation posts to conduct air defense early warning.

In fact, if there is a mature sea search radar, it is best to scan the periscope on the sea surface. Unfortunately, with the same technical problems, as long as the wind and waves are slightly larger, it will not be possible to filter out the clutter on the sea surface.

It is still the most accurate to use the naked eye.

With this idea, sailor Kritis carefully observed the sea surface, searching little by little, and finally, on the sparkling sea surface, he seemed to have found something.

He quickly adjusted his telescope, enlarged it, and then zoomed in. When the eyepiece was clearly imaged, he finally screamed: "The port side is thirty degrees, five nautical miles away. I found a suspicious target, which may be a submarine periscope!"

His voice was like a thunderclap in the sunny day, and the entire formation was instantly alarmed.

Countless telescopes looked at the direction he indicated and searched the sea. At the same time, in the middle of the formation, a destroyer drove at full speed and met, and the deep bomb launchers at the tail were all ready.

But, nothing is there.

"Chritis, have you read it wrong?" The captain stood in his position, observing the sea with a telescope, but found nothing, so he couldn't help but frown and asked.

"No, I can see clearly." Kritis said: "There must be submarines, there must be submarines!"

He firmly believed that he had read it right.

"Well, it seems that you're too nervous recently. You can go back to the cabin to rest, have a good night's sleep, and come over to work tomorrow." The captain said, "Come here one person."

Is it really that I was too nervous? Kritis shook his head helplessly and walked towards the cabin.

The most important equipment is transported on this ship, which is said to be an anti-tank weapon that is urgently needed on the front line. There must be no mistakes. In the entire fleet, their pressure is indeed the greatest.

"If the German submarine appears, we will definitely attack us." The captain said: "There is nothing to make a fuss."

They didn't know that they had made a serious mistake.

Underwater.

"It was so thrilling just now. I could almost see the sailor looking at us from the periscope." On u-07, the deputy captain Ruth said: "So I was quick-eyed and quickly put the periscope down."

"Actually, if we just started, we could kill several cargo ships." Another senior mate said.

Heisler shook his head: "We can't do it just now. We can't eat so many cargo ships by ourselves. We must kill all the cargo ships at once, just like wolves. Now, we will follow their fleet and wait for our companions to arrive. Now, start the AIP system."

If it is an ordinary submarine, there is no problem with keeping up with the water surface. After all, the speed of the cargo ship is quite low, but it cannot be tracked for a long time, because the power of the submarine's battery is quite limited, and after a period of time, it will have to be charged.

Now, the submarines after the U-00 are all AIP submarines, which use Sterling engines, and can sail at low speeds for a long time. It is absolutely fine to keep up with their surface cargo ships!

The propeller at the tail of u-07 was rotating, gently stirring the sea water. After the noise from the submarine spread to the cargo ship formation, it could hardly be heard. After the cargo ship formation left, it followed again, which immediately made the people on the submarine even more strange.

"They have passed Artu Island, and they haven't turned around yet. What do these cargo ships want to do?" Ruth couldn't help asking.

"I think they are going to change their routes and transport the goods directly to the Far East." Hesler made such a judgment, and after saying this, everyone present was amused: "In other words, as long as we are near the base in the future, we can hunt Soviet transport ships?"

At that time, there was only one nuclear submarine and could only wander on the Arctic route, so the Soviets simply ran to the Far East to carry out transportation. Now, Germany has established a nuclear submarine base on the four northern islands in Hokkaido, but the Soviets did not notice it. It would be too stupid to design the route like this.

Unfortunately, the submarines patrolling the Bering Sea were all lost. Fortunately, there were several submarines behind them that could be intercepted head-on as soon as possible.

The day has passed.

For the Soviet sailors, every day was like a year, and every day passed, they would breathe a long breath and live another day.

When the sun rises from the east again, the entire fleet can already see the Kamchatka Peninsula on the starboard side from afar.

The Soviets are approaching.

"How is it? Did you sleep well last night?" When Kritis stood on the lookout set up on the side of the boat again, a sound came from his ears.

"Fortunately, it seems that I must have been dazzled yesterday." Kritis said.

If I saw a German submarine yesterday, I would have been attacked yesterday. As a result, it has been calm until now.

I must have been dazzled, which made everyone nervous for more than an hour. Now, Kritis feels quite guilty.

"It's okay, young man, do it well." The captain patted his shoulder: "Everyone's maturity requires a process. Don't be stressed, and continue to work."

The captain returned to his captain's room, and Critis put his eyes on the telescope and began to observe again.

What is that?

Kritis rubbed his eyes and observed again.

Exactly the same as yesterday.

The shimmering sea surface was shaking, and on this sea surface, a thin cylinder-like thing appeared half a meter high. This thing was tumbling with the waves but was as steady as Mount Tai. Isn’t this a periscope?

No, I must be dazzled.

Kritis didn't believe he had this luck, so he could just sweep it? In that case, he would have become the one chosen by God to warn the entire fleet.

Turn to another sea and take a look.

When he turned the telescope for more than ten degrees and searched again, he adjusted the focal length and became clearer in his vision, and it was still the same scene!
Chapter completed!