"Eleventh" water drops slowly slide along the circular handle of the seawater valve, and then drips on the orange-red transparent celluloid baffle below.

"Thirteenty-fourth" Corporal Udel sat on the aisle fence, looking up at the valve obliquely above.

On the 15th Five-Year Plan, Udel lowered his head and stuffed a slice of peppermint candy into his mouth.

The combat light dyed everything in the power cabin red, only several green lights on the dashboard. The waterproof door leading to the tail torpedo cabin was locked, and Private Bruno sat on the steps at the door, playing with his fingers boredly.

"Ten" Udel found that he might have missed a few drops of water just now, so he decided to give up the game.

"Clang" a melodious knock sounded outside the bulkhead, which sounded like a wrench hitting an empty clay tank.

"Damn!" Uddt jumped up and turned his head to look at the bulkhead.

"Cang" is another knock.

"He found us, he found us again." Bruno screamed loudly.

"Udel, shut up that idiot and keep quiet." Sergeant Nagazek, the engineer, shouted loudly with the receiver of the telephone in the cabin.

"Yes, captain, we are on standby." Zehe made two gestures, and the sailors hurriedly took their place.

"Is there no other way? I understand. Judging from what you said, how is this possible? He still owe me two bottles of rum." Zehe laughed, and then hung up the telephone in the cabin.

"The motor starts, the two vehicles are one-third fast." Zehe looked at the pointer on the ship bell and issued the start command.

Udel stood in front of the motor operating table on the starboard side of the submarine, and pulled down the control lever with both hands. A gentle buzzing sound rang out, and the two Siemens gu354 motors began to rotate. The huge power drove the paddle shaft through the gear transmission. The hull shook slightly, and then began to slowly move forward.

"Float to the depth of the periscope immediately." Captain Hank Robin gave the floating order to the Navigation Chief.

"It's the sir, who floats up to the depth of the periscope." The navigator repeated the order.

The submersible levitator opened the valves of the main ballast water tank in turn, and the sound of high-pressure gas gushing out of the boat hull and under the floor was heard. A large amount of high-pressure gas was pumped into the ballast water tanks everywhere in the hull. The sea water in the cabin was squeezed out of the cabin, and the buoyancy of the submarine increased rapidly.

Because the size of the compartment is different from the drainage speed, the hull gradually tilts to the starboard side, which is very normal. After several balance cabins are adjusted for drainage and injection, the hull quickly returns to level. Under the command of the long navigation, the balance rudder of the bow and tail adjusts the angle. The boat is raised upwards by five degrees, the electric motor begins to run at full speed, and the u106 floats towards the sea surface at a speed of five meters per second.

"Captain, find the target, ninety degrees." The sonar operator poked his head out from behind the curtain in the radio room.

"It's u1001. I heard the sound of the ballast tank blowing, and she was also preparing to float."

"I know, keep monitoring." Robin ordered.

"Yes, captain." The operator retracted back to the telecommunications room.

"Have the data for this training been sorted out?" Captain Robin walked to the chart table and asked the deputy captain Igor.

"It's all here." Igor patted the navigation record in his hand.

"After this return, I'm ready to take a good vacation." Robin turned around and leaned on the chart table.

"Why, I'm hit by confidence?" The first mate held a compass and gestured on the chart.

"How is that possible? I just feel a little tired." Robin took off his military cap and scratched his head.

This is the seventh day of the u106's departure. With the paper data of this ocean-going submarine, this time is nothing, but in these seven days, u106 and u1001 conducted three consecutive high-intensity confrontation trainings. At this time, both personnel and machinery were approaching their limits.

"Where are you going to go on vacation? Do you want me to have a companion with you?" Igor threw the compass on the map table.

"I haven't decided yet, I want to go to China to have a look." Robin said, putting on a soft combat hat and touching the stubble on his chin.

"China? I'm very interested, especially after hearing Captain Wang's introduction to his hometown last time, he asked me to visit his house when I had time. What's the name of that place? I remember he wrote it down and I need to check my notebook." Igor walked to the stairs of the command tower.

"I wonder how Wang and his subordinates are doing now?" Robin reached out to catch the escalator.

"I heard that they were assigned to internship No. u63." Igor replied.

“Vi type?”

"Vi-type." Igor nodded vigorously.

"Well, that's suitable for them." Robin shrugged, then turned his head and shouted at the sailor: "Rise the periscope."

"Yes, raise the periscope." The sailor pressed the lift button for a long time.

"Note! High-speed propeller! One hundred and seventy-five degrees." Suddenly, the sonar soldiers' alarm came.

"I heard nothing just now, she seemed to appear suddenly, captain." The operator shouted.

The periscope was raised in place, and Robin quickly held the grip and turned to the direction reported by the sonar operator.

"I found out that's it." Robin had a strange expression on his face, and he turned to look at the nervous first mate.

"That's a submarine."

"Is it ours?" Igor relaxed.

"No, that's a Japanese Navy submarine."

"What? Let me see." The deputy captain walked to the periscope.

"Let me check it out." Robin walked to the chart table and found the ship identification manual from the file cabinet hanging on the bulkhead.

"The u1001 stopped floating, she seemed to be turning." The sonar operator reported.

"Heinke must have discovered this Japanese submarine, with the u1001 technology, maybe earlier than what we discovered," said Igor.

"I found it, it's this, the Haida Iiib type ocean submarine, with a total length of 101 meters and an underwater displacement of 2,300 tons. It's such a big guy." Robin slapped the opened identification manual on the chart table.

"This is the first time we have encountered a Japanese submarine at sea. What are you going to do?" Igor asked.

"Float." Robin buckled the buckle of a tropical shirt.

"What?" The deputy captain didn't hear it clearly.

"Let's float to the sea." Robin straightened his soft combat hat and looked at a small mirror hanging on the filing cabinet.

"Go and say hello to our Japanese colleagues, this is the politeness of the German Navy." The captain grinned his teeth at the mirror, and then nodded with satisfaction.

"Float to the surface." Igor shook his head and issued an order to float.

"Empty the water cabinet. The bow balance rudder elevation angle is fifteen degrees."

"Be careful, don't move too hard. Two cars are at full speed!"

"Two cars are at full speed, sir."

"Prepare to get out of the water!" shouted the navigator.

Two seconds later, u106 jumped out of the water fiercely like an iron shark. The sharp bow of the boat stopped in the air for a moment, and then it smashed back to the sea. Snow-white waves splashed everywhere, and the mist soared into the air under the brilliant sunlight. A gorgeous rainbow suddenly appeared above the dark green command tower.

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