Not long after the Cossack destroyer turned on the passive sonar, the submarine U47 at a depth of 50 meters also turned on the passive sonar.

"Sir! Propeller sound! As soon as the sonar turned on the passive sonar, he heard a distinct sound of propellers.

"Location, distance!" Prien said calmly.

"5.6 km due west!"

"Heading west, slowing down to a quarter! The whole boat performs a level 2 silence! ”

"Understood, heading due west, reduce speed to a quarter!" The driver repeated the command, and then stopped making any sound.

Not only him, but the entire crew stopped talking, and the only sound that came out was the muffled working sound of some of the machines, except for the commander's whispered orders from time to time.

Cossack destroyer.

After the U47 began to perform a second level of silence, the sonar crew on the Cossack lost track of the U47.

"Sir, I've lost track of my target." The sonar soldier said to the captain in frustration.

"It's fine." The captain reassured, "Where are their final positions?" ”

"It's 5.6 km due east."

After listening to the sonar soldier's words, the captain thought for a moment and said: "Regardless of them, you continue to listen carefully, let's go to the place where they disappeared, most of them are in a state of silence, and they can't run far in a state of silence!" ”

"Understood."

A little more than ten minutes later, the Cossacks arrived at the place where U47 was last detected.

After checking the chart to determine where he had arrived, the pilot reported to the captain: "Sir, we have arrived at the place. ”

The captain nodded, then ordered, "Turn off the engines and create a quieter environment for our sonar crews!" ”

"Understood, engine off!"

With the pilot's manipulation, the Cossack shull turned off all the power plants with a light jolt, and then began to glide, and the people on the bridge turned their eyes to the sonar men.

And the sonar soldiers lived up to expectations, once again successfully capturing the negligible sound of the U47.

"I've found him, sir!" After hearing the movement of the U47, the sonar soldier excitedly shouted to the captain.

"Location!"

"1.3 km due west!"

"Clever fellow, running behind us?" The captain smiled, "It's a pity that we found you!" Reversing at full speed, two salvos of depth charges in the stern! ”

"Understood! Reversing at full speed. The driver restarted the engine, the Cossack's chimney re-spewed smoke, and the battleship fell from fast to slow toward where the U47 was.

Submarine command room U47.

"Sir, the enemy ships are coming towards us! 1.3 km, 1.2 km, 1.1 km due east......" The sonar soldier broke the silence and said to Prion in horror, "Sir, we have been discovered!" ”

"Steady the soldiers, hold steady!" Although he was discovered, Prien was as calm as ever.

But the situation did not get better because of Prien's calmness, on the contrary, it became more serious.

"Two falling waters! Sir, they've unleashed depth charges! ”

"Distance!" Prien asked calmly.

"600 meters away!"

"600 meters away? It's really unskilled! Prian scoffed, "Let the Brit see how good we are!" The stern torpedo is prepared, set to a depth of 2 meters, launched! ”

"Understood, the aft torpedo is set to a depth of 2 meters, launch!" The herald repeated Prien's order, and then passed it on to the aft torpedo compartment.

"Bang!" With a muffled sound, a 610mm torpedo was pushed out of the torpedo tube by compressed air, and while it was rapidly rising from 50 meters to 2 meters, it was pushed by the propeller towards the Cossacks.

"Torpedo fired!"

"Very good, turn off the engine, and the whole boat will go into the third level of silence!" Prion nodded, commanding as he took off his shoes.

After receiving the order to enter Level 3 Silence, everyone took off their shoes one after another to prevent making noise when walking. Some of the non-combat positions even went straight back to the sailors' quarters and tied themselves to their beds.

At the same time, on the destroyer Cossacks.

"The sound of bubbles! Propeller sound! The sonar soldier heard the movement of the U47 firing a torpedo, and shouted with a frightened face, "The enemy submarine fired a torpedo at us!" ”

"Right full rudder! Urgent evasion! The captain reacted immediately, then ran to the port window and stared at the sea.

As the evasive maneuver was executed, the Cossack began to turn sharply to the right, and at the same time, the hull of the ship tilted sharply to the left due to inertia, which caused many unprepared people to fall to the ground.

More than twenty seconds later, a snow-white torpedo trail flew past the Cossacks' original position. If it hadn't been discovered earlier by the sonar soldiers, the destroyer, which had a full load displacement of only 2,420 tons, would have been sent into the sky by this powerful 610mm torpedo.

"God forbid!" The crew looked at the wake and wiped the cold sweat on their heads and said happily.

"Well done, man!" The captain rubbed the sonar soldier's head and complimented, "You saved the lives of a boatload of people!" ”

"It's nothing, sir! This is what I should do. The sonar soldier scratched his head and smiled.

"Haha, modest lad." The captain listened to the sonar soldier's words, laughed twice, and said, "It's time for us to find the littering German, my good fellow, where is he now?" ”

The sonar soldier listened to the captain's order, lowered his head and began to listen carefully.

After a long time, the sonar soldier raised his head helplessly and said to the captain: "Sir! Sorry, I can't find him again. ”

"Can't find it again?" The captain was stunned, "Did they turn off the engine?" ”

"Sir, what are we going to do?" Everyone looked at the backbone of this warship and asked.

"Turn on active sonar!" The captain gritted his teeth and said, "Whether you can kill them or not depends on the two minutes that the active sonar is activated!" ”

"Understood, active sonar enabled!" The sonar soldier repeated the command, then turned on the active sonar.

With the activation of active sonar, invisible sound waves were emitted from the Cossacks' active sonar array, spreading out into the surrounding water.

Some of the sound waves that spread out hit the U47 and reflected back to the sonar's headphones.

"Capture the target, 1100 meters to the southwest, 50 meters deep!" The sonar soldier recaptured the U47 in the level 3 silence and shouted excitedly.

"Anti-submarine torpedo preparation! Dingshen 50, Dingyuan 1100, heading to the southwest, two salvos! ”

"Understood, anti-submarine torpedoes, course to the southwest, two salvos!"

Following the order of the captain, two torpedoes were successively pushed into the water, sinking to a depth of 50 meters and firing at the U47.

"Captain! The enemy ship turns on the active sonar and we are spotted! The sonar soldier on the U47 changed his face when he heard the Cossack destroyer turn on the active sonar.

But the sound that followed almost made him fall to the ground: "Two propellers are approaching in the northeast!" The speed is 60 knots, and the collision is expected after 35 seconds! ”

Not long after the Cossack destroyer turned on the passive sonar, the submarine U47 at a depth of 50 meters also turned on the passive sonar.

"Sir! Propeller sound! As soon as the sonar turned on the passive sonar, he heard a distinct sound of propellers.

"Location, distance!" Prien said calmly.

"5.6 km due west!"

"Heading west, slowing down to a quarter! The whole boat performs a level 2 silence! ”

"Understood, heading due west, reduce speed to a quarter!" The driver repeated the command, and then stopped making any sound.

Not only him, but the entire crew stopped talking, and the only sound that came out was the muffled working sound of some of the machines, except for the commander's whispered orders from time to time.

Cossack destroyer.

After the U47 began to perform a second level of silence, the sonar crew on the Cossack lost track of the U47.

"Sir, I've lost track of my target." The sonar soldier said to the captain in frustration.

"It's fine." The captain reassured, "Where are their final positions?" ”

"It's 5.6 km due east."

After listening to the sonar soldier's words, the captain thought for a moment and said: "Regardless of them, you continue to listen carefully, let's go to the place where they disappeared, most of them are in a state of silence, and they can't run far in a state of silence!" ”

"Understood."

A little more than ten minutes later, the Cossacks arrived at the place where U47 was last detected.

After checking the chart to determine where he had arrived, the pilot reported to the captain: "Sir, we have arrived at the place. ”

The captain nodded, then ordered, "Turn off the engines and create a quieter environment for our sonar crews!" ”

"Understood, engine off!"

With the pilot's manipulation, the Cossack shull turned off all the power plants with a light jolt, and then began to glide, and the people on the bridge turned their eyes to the sonar men.

And the sonar soldiers lived up to expectations, once again successfully capturing the negligible sound of the U47.

"I've found him, sir!" After hearing the movement of the U47, the sonar soldier excitedly shouted to the captain.

"Location!"

"1.3 km due west!"

"Clever fellow, running behind us?" The captain smiled, "It's a pity that we found you!" Reversing at full speed, two salvos of depth charges in the stern! ”

"Understood! Reversing at full speed. The driver restarted the engine, the Cossack's chimney re-spewed smoke, and the battleship fell from fast to slow toward where the U47 was.

Submarine command room U47.

"Sir, the enemy ships are coming towards us! 1.3 km, 1.2 km, 1.1 km due east......" The sonar soldier broke the silence and said to Prion in horror, "Sir, we have been discovered!" ”

"Steady the soldiers, hold steady!" Although he was discovered, Prien was as calm as ever.

But the situation did not get better because of Prien's calmness, on the contrary, it became more serious.

"Two falling waters! Sir, they've unleashed depth charges! ”

"Distance!" Prien asked calmly.

"600 meters away!"

"600 meters away? It's really unskilled! Prian scoffed, "Let the Brit see how good we are!" The stern torpedo is prepared, set to a depth of 2 meters, launched! ”

"Understood, the aft torpedo is set to a depth of 2 meters, launch!" The herald repeated Prien's order, and then passed it on to the aft torpedo compartment.

"Bang!" With a muffled sound, a 610mm torpedo was pushed out of the torpedo tube by compressed air, and while it was rapidly rising from 50 meters to 2 meters, it was pushed by the propeller towards the Cossacks.

"Torpedo fired!"

"Very good, turn off the engine, and the whole boat will go into the third level of silence!" Prion nodded, commanding as he took off his shoes.

After receiving the order to enter Level 3 Silence, everyone took off their shoes one after another to prevent making noise when walking. Some of the non-combat positions even went straight back to the sailors' quarters and tied themselves to their beds.

At the same time, on the destroyer Cossacks.

"The sound of bubbles! Propeller sound! The sonar soldier heard the movement of the U47 firing a torpedo, and shouted with a frightened face, "The enemy submarine fired a torpedo at us!" ”

"Right full rudder! Urgent evasion! The captain reacted immediately, then ran to the port window and stared at the sea.

As the evasive maneuver was executed, the Cossack began to turn sharply to the right, and at the same time, the hull of the ship tilted sharply to the left due to inertia, which caused many unprepared people to fall to the ground.

More than twenty seconds later, a snow-white torpedo trail flew past the Cossacks' original position. If it hadn't been discovered earlier by the sonar soldiers, the destroyer, which had a full load displacement of only 2,420 tons, would have been sent into the sky by this powerful 610mm torpedo.

"God forbid!" The crew looked at the wake and wiped the cold sweat on their heads and said happily.

"Well done, man!" The captain rubbed the sonar soldier's head and complimented, "You saved the lives of a boatload of people!" ”

"It's nothing, sir! This is what I should do. The sonar soldier scratched his head and smiled.

"Haha, modest lad." The captain listened to the sonar soldier's words, laughed twice, and said, "It's time for us to find the littering German, my good fellow, where is he now?" ”

The sonar soldier listened to the captain's order, lowered his head and began to listen carefully.

After a long time, the sonar soldier raised his head helplessly and said to the captain: "Sir! Sorry, I can't find him again. ”

"Can't find it again?" The captain was stunned, "Did they turn off the engine?" ”

"Sir, what are we going to do?" Everyone looked at the backbone of this warship and asked.

"Turn on active sonar!" The captain gritted his teeth and said, "Whether you can kill them or not depends on the two minutes that the active sonar is activated!" ”

"Understood, active sonar enabled!" The sonar soldier repeated the command, then turned on the active sonar.

With the activation of active sonar, invisible sound waves were emitted from the Cossacks' active sonar array, spreading out into the surrounding water.

Some of the sound waves that spread out hit the U47 and reflected back to the sonar's headphones.

"Capture the target, 1100 meters to the southwest, 50 meters deep!" The sonar soldier recaptured the U47 in the level 3 silence and shouted excitedly.

"Anti-submarine torpedo preparation! Dingshen 50, Dingyuan 1100, heading to the southwest, two salvos! ”

"Understood, anti-submarine torpedoes, course to the southwest, two salvos!"

Following the order of the captain, two torpedoes were successively pushed into the water, sinking to a depth of 50 meters and firing at the U47.

"Captain! The enemy ship turns on the active sonar and we are spotted! The sonar soldier on the U47 changed his face when he heard the Cossack destroyer turn on the active sonar.

But the sound that followed almost made him fall to the ground: "Two propellers are approaching in the northeast!" The speed is 60 knots, and the collision is expected after 35 seconds! ”