Chapter 153： Sonar detection by American fishing team
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"Haha... You don't have to praise me. This time, I was able to catch so many schools of fish. One is because there are already many schools of fish here in Hokkaido, and the other is the technology of sonar to detect fish schools, otherwise we would be so fast. Fishing boats that are half full!" Brett laughed.
"Yes, I have to say that this sonar fish detection technology is really very powerful. It can detect whether there are fish in the nearby sea within nearly a kilometer. It is really against the sky!" Robin also sighed.
"It's a pity that the funds allocated by the headquarters are too small. Only one fishing boat is installed with a vertical sonar fish finder. If this technology is installed on every fishing boat, we will catch more fish. At that time Each fishing boat can act alone." Dennis said a little dissatisfied.
"Dennis, this time, you're blaming the headquarters! It's not that the headquarters doesn't want to allocate money to set up a more powerful fishing team. It's that this sonar detection technology is an advanced technology, which was previously applied to the navy and army. It's only now that it is relaxed. It is applied to fishing. For example, the vertical sonar fish search instrument we are currently using. It is extremely expensive, and it was bought by the senior executives of the headquarters after spending a lot of money!" Brett explained.
"So that's the case, then I'm really wrong. But it sounds like this kind of thing is really not affordable for ordinary people. I don't think the turtle fishing teams at Nemuro Fishing Port can't use it." Dennis laughed.
"Not only can't it be used, but it's hard for them to buy it if they want to." Robin also laughed.
"We have advanced fishing technology and a huge fishing team. We can definitely do well here. Maybe we will become the No. 1 ocean fishing team in Hokkaido in the future!" Brett said. Hopeful face.
"We have the technology to detect fish with sonar, I think we should have the opportunity to do it!" Now the US Imperial Ocean Fishing Team has this detection technology, not to mention the entire Hokkaido, anyway, it is definitely the only one in Nemuro Fishing Port! They are now in the rhythm of the hegemony.
Sonar technology was invented by Lewis Nixon in 1906. By the time of the First World War, it was applied to the battlefield to detect submarines lurking in the bottom of the water. These sonars can only be passively listened to and belong to passive sonar, or "hydrophones".
However, the technology of sonar detection of fish schools has been developed and applied since World War II.
During World War II, destroyers equipped with military sonar sometimes mistook fish schools for submarines and attacked them, which aroused people's interest in sonar fish detection. After the war, some countries borrowed sonar-equipped warships for fish-finding research.
From the 1940s to the 1960s, vertical fish finder and fishing sonar appeared, making underwater acoustic reconnaissance the main means of modern fish reconnaissance. In the 1960s, sonar had become an important piece of equipment on purse seiners and mid-level trawlers. In the mid-1960s, the technology of indirect reconnaissance of fish by space remote sensing began to enter the practical stage.
Among them, the vertical fish finder first appeared in the 45-50 years, and the fishing sonar was only developed after the 1950s.
Fishing sonar is much more advanced than vertical fish finder!
The fish finder is mainly composed of transmitter, transducer, receiver and recording display. The common working frequency is 20-200 kHz, and the depth of fish exploration can reach 1000 meters.
What is more advanced and later than it is the fishing sonar!
Fishing Sonar Fishing sonar consists of transmitter, receiver, terminal display, transducer array, etc. Its working principle is similar to that of vertical fish finder. The difference is that the vertical fish finder only provides the information of the fish school vertically below the fishing boat, while the fishing sonar can detect all directions around the fishing boat, and can provide the azimuth, distance, depth, swimming speed, etc. of the fish school. Information, its action distance is required to be as far as possible, and the resolution is required to be as good as possible.
The effective fishing distance it can achieve is generally about one kilometer in shallow sea areas, and can reach several thousand meters in deep sea areas. The operating frequency is generally between 20 and 200 kHz.
Currently, the U.S. imperial ocean fishing fleet uses vertical fish finder. As for fishing sonar, it is estimated that it will take a year or two before anyone can use it. Even if someone uses it, but not everyone can afford it, not the kind of local tyrant fishing team can't afford it.
It is estimated that it will take 55 years for the vertical fish finder to be widely used by most fishing teams, and the sonar for fishing did not enter the fishing boats of the majority of fishing teams until the 1960s.
For example, in the 1950s, even a vertical fish finder could only be used by a large fishing team under the name of Meidi Ocean Fishing Company! Can the average fishing team afford it?
"Captain, there is a school of herring at a depth of 100 meters in the reverse direction of the fish finder!" While the three were chatting, a technician ran in and reported.
When the three of them heard it, they were neither happy nor sad, because they were used to the schools of fish that appeared.
"Okay, immediately organize the purse seine, be sure to eat this school of fish!" Brett said loudly with a big hand.
I have to say that this American imperial ocean fishing fleet is very powerful, with advanced fishing boats and fish search instruments. Brett and others are also experienced in fishing and can often find sea areas where fish schools frequently appear. Coupled with the assistance of the fish search instrument, it is simply a multiplier!
Twenty fishing boats are catching all kinds of fish frantically here, just like a giant beast that swallows gold.
On the fishing boats, the local sailors of the Nemuro fishing port were also very shocked to see so many fish schools caught by the US imperial fishing boats these days!
"I overheard a few days ago that one of the fishing boats of the US Imperial Ocean Fishing Team has an advanced instrument called a fish searcher, which can detect fish under the sea! It seems to be called a sonar detection technology." Afterwards the group of sailors huddled together to chat. Those American emperors generally look down on them, and they are too lazy to bird them. So their native sailors had to hide on their own.
"I've heard about it too, so I'll just say it. Half of the fishing boats are full in a week, so it's so advanced technology!"
"Sonar detection, isn't that for warships? Can it detect schools of fish?"
"I don't know, but I think that Brett is an experienced fisherman. He is really strong in finding fish. He seems to know the sea area here, the currents, etc. very well. He can judge where Where are the waters where fish appear more frequently and are suitable for fishing. I overheard some of them chatting yesterday!" A literate sailor pushed his glasses and said, he could understand English.
"Hey, don't forget, these American emperors are catching fish that belong to us! What a pity, what a pity, we..." a sailor shouted.
"Hehe... Then you still have to work for them? Isn't this forced by life?"
…………
On the other hand, Minano Shuichi continued to lead the fishing fleet the next day after eating the swordfish feast. In the morning, two groups of cod were caught, and about 30,000 were caught.
At noon, Hideo Minami received a system notification sound when she hurriedly finished her meal.
"Ding Dong... Southwest, 10 nautical miles from the host, a cod school was found. The fish school's longitude is 152.1 and latitude is 49.9. The number is 20,932!"
"Ah~ I just finished eating and I'm going to be busy again." Minami Shuichi said to himself.
Without saying that much, Minano Shuichi ran to drive the fishing boat and set off towards the position of the fish.
"The ability to position yourself with fish is sometimes a tough ability. The greater the ability, the more tiring you are!" Nanye Xiuyi thought to himself. In fact, he didn't know that there was no ability to be more tired than him.
The process of pelagic fishing to find fish is often based on luck. No luck depends on the experience of the fishermen! With the advent of sonar detection and satellite remote sensing, ocean fishing has become less difficult.
However, technology is limited after all, and technology is not omnipotent! Besides, those advanced technological instruments are not available to those poor fishing boats. In this day and age, most of it is based on experience. Even the 1960s depended on experience.
Minamino Shuichi's fishing fleet was slowly approaching the cod fish that he had just discovered. When Minamino Shuichi was still a few nautical miles away from the fish, he was surprised to find that he was actually taken first!
Just now, as soon as Minamino Hidey discovered the fish school, he hurriedly started the boat, and did not switch his vision to check the fish school. Anyway, he felt that the school of fish could not escape and was too lazy to check it.
But now, when he came to the vicinity to take a look, he saw a large fishing team fishing for the cod fish that the system suggested to him before!
These are all things Minamino Shuichi knew in his heart, but the sailors on the fishing boat were different from Ishida Yu. When they saw the 20 fishing boats a few nautical miles away, they all exclaimed.
"Which fishing port is this fishing team? It's so big, there are 20 boats in total, my God!"
"It should be a temporary joint fishing team. Otherwise, how can a fishing team have as many as 20 fishing boats. A dozen fishing boats are enough. Like the fishing team in our Nemuro fishing port, ten fishing boats can't It's over," guessed one of the sailors.
"Huh, no, they seem to be the fishing team of our Nemuro fishing port."
"Ah, by the way, I know, they are the American Emperor Ocean Fishing Fleet just established by the American Emperor Ocean Fishing Company! I didn't think they were just formed, they were recruiting people a week ago, and now they are going out to sea to fish, It's really fast." Ishida Yu exclaimed with wide eyes. Obviously can't believe it.
"It turned out to be them!" Minano Shuichi murmured. However, he was a little puzzled. How could the fish that he discovered were preempted by these guys?
"Is it a coincidence? They were catching the fish when they found it, or did they find the fish before me!" Minami Hideichi guessed in his heart.
"Haha... You don't have to praise me. This time, I was able to catch so many schools of fish. One is because there are already many schools of fish here in Hokkaido, and the other is the technology of sonar to detect fish schools, otherwise we would be so fast. Fishing boats that are half full!" Brett laughed.
"Yes, I have to say that this sonar fish detection technology is really very powerful. It can detect whether there are fish in the nearby sea within nearly a kilometer. It is really against the sky!" Robin also sighed.
"It's a pity that the funds allocated by the headquarters are too small. Only one fishing boat is installed with a vertical sonar fish finder. If this technology is installed on every fishing boat, we will catch more fish. At that time Each fishing boat can act alone." Dennis said a little dissatisfied.
"Dennis, this time, you're blaming the headquarters! It's not that the headquarters doesn't want to allocate money to set up a more powerful fishing team. It's that this sonar detection technology is an advanced technology, which was previously applied to the navy and army. It's only now that it is relaxed. It is applied to fishing. For example, the vertical sonar fish search instrument we are currently using. It is extremely expensive, and it was bought by the senior executives of the headquarters after spending a lot of money!" Brett explained.
"So that's the case, then I'm really wrong. But it sounds like this kind of thing is really not affordable for ordinary people. I don't think the turtle fishing teams at Nemuro Fishing Port can't use it." Dennis laughed.
"Not only can't it be used, but it's hard for them to buy it if they want to." Robin also laughed.
"We have advanced fishing technology and a huge fishing team. We can definitely do well here. Maybe we will become the No. 1 ocean fishing team in Hokkaido in the future!" Brett said. Hopeful face.
"We have the technology to detect fish with sonar, I think we should have the opportunity to do it!" Now the US Imperial Ocean Fishing Team has this detection technology, not to mention the entire Hokkaido, anyway, it is definitely the only one in Nemuro Fishing Port! They are now in the rhythm of the hegemony.
Sonar technology was invented by Lewis Nixon in 1906. By the time of the First World War, it was applied to the battlefield to detect submarines lurking in the bottom of the water. These sonars can only be passively listened to and belong to passive sonar, or "hydrophones".
However, the technology of sonar detection of fish schools has been developed and applied since World War II.
During World War II, destroyers equipped with military sonar sometimes mistook fish schools for submarines and attacked them, which aroused people's interest in sonar fish detection. After the war, some countries borrowed sonar-equipped warships for fish-finding research.
From the 1940s to the 1960s, vertical fish finder and fishing sonar appeared, making underwater acoustic reconnaissance the main means of modern fish reconnaissance. In the 1960s, sonar had become an important piece of equipment on purse seiners and mid-level trawlers. In the mid-1960s, the technology of indirect reconnaissance of fish by space remote sensing began to enter the practical stage.
Among them, the vertical fish finder first appeared in the 45-50 years, and the fishing sonar was only developed after the 1950s.
Fishing sonar is much more advanced than vertical fish finder!
The fish finder is mainly composed of transmitter, transducer, receiver and recording display. The common working frequency is 20-200 kHz, and the depth of fish exploration can reach 1000 meters.
What is more advanced and later than it is the fishing sonar!
Fishing Sonar Fishing sonar consists of transmitter, receiver, terminal display, transducer array, etc. Its working principle is similar to that of vertical fish finder. The difference is that the vertical fish finder only provides the information of the fish school vertically below the fishing boat, while the fishing sonar can detect all directions around the fishing boat, and can provide the azimuth, distance, depth, swimming speed, etc. of the fish school. Information, its action distance is required to be as far as possible, and the resolution is required to be as good as possible.
The effective fishing distance it can achieve is generally about one kilometer in shallow sea areas, and can reach several thousand meters in deep sea areas. The operating frequency is generally between 20 and 200 kHz.
Currently, the U.S. imperial ocean fishing fleet uses vertical fish finder. As for fishing sonar, it is estimated that it will take a year or two before anyone can use it. Even if someone uses it, but not everyone can afford it, not the kind of local tyrant fishing team can't afford it.
It is estimated that it will take 55 years for the vertical fish finder to be widely used by most fishing teams, and the sonar for fishing did not enter the fishing boats of the majority of fishing teams until the 1960s.
For example, in the 1950s, even a vertical fish finder could only be used by a large fishing team under the name of Meidi Ocean Fishing Company! Can the average fishing team afford it?
"Captain, there is a school of herring at a depth of 100 meters in the reverse direction of the fish finder!" While the three were chatting, a technician ran in and reported.
When the three of them heard it, they were neither happy nor sad, because they were used to the schools of fish that appeared.
"Okay, immediately organize the purse seine, be sure to eat this school of fish!" Brett said loudly with a big hand.
I have to say that this American imperial ocean fishing fleet is very powerful, with advanced fishing boats and fish search instruments. Brett and others are also experienced in fishing and can often find sea areas where fish schools frequently appear. Coupled with the assistance of the fish search instrument, it is simply a multiplier!
Twenty fishing boats are catching all kinds of fish frantically here, just like a giant beast that swallows gold.
On the fishing boats, the local sailors of the Nemuro fishing port were also very shocked to see so many fish schools caught by the US imperial fishing boats these days!
"I overheard a few days ago that one of the fishing boats of the US Imperial Ocean Fishing Team has an advanced instrument called a fish searcher, which can detect fish under the sea! It seems to be called a sonar detection technology." Afterwards the group of sailors huddled together to chat. Those American emperors generally look down on them, and they are too lazy to bird them. So their native sailors had to hide on their own.
"I've heard about it too, so I'll just say it. Half of the fishing boats are full in a week, so it's so advanced technology!"
"Sonar detection, isn't that for warships? Can it detect schools of fish?"
"I don't know, but I think that Brett is an experienced fisherman. He is really strong in finding fish. He seems to know the sea area here, the currents, etc. very well. He can judge where Where are the waters where fish appear more frequently and are suitable for fishing. I overheard some of them chatting yesterday!" A literate sailor pushed his glasses and said, he could understand English.
"Hey, don't forget, these American emperors are catching fish that belong to us! What a pity, what a pity, we..." a sailor shouted.
"Hehe... Then you still have to work for them? Isn't this forced by life?"
…………
On the other hand, Minano Shuichi continued to lead the fishing fleet the next day after eating the swordfish feast. In the morning, two groups of cod were caught, and about 30,000 were caught.
At noon, Hideo Minami received a system notification sound when she hurriedly finished her meal.
"Ding Dong... Southwest, 10 nautical miles from the host, a cod school was found. The fish school's longitude is 152.1 and latitude is 49.9. The number is 20,932!"
"Ah~ I just finished eating and I'm going to be busy again." Minami Shuichi said to himself.
Without saying that much, Minano Shuichi ran to drive the fishing boat and set off towards the position of the fish.
"The ability to position yourself with fish is sometimes a tough ability. The greater the ability, the more tiring you are!" Nanye Xiuyi thought to himself. In fact, he didn't know that there was no ability to be more tired than him.
The process of pelagic fishing to find fish is often based on luck. No luck depends on the experience of the fishermen! With the advent of sonar detection and satellite remote sensing, ocean fishing has become less difficult.
However, technology is limited after all, and technology is not omnipotent! Besides, those advanced technological instruments are not available to those poor fishing boats. In this day and age, most of it is based on experience. Even the 1960s depended on experience.
Minamino Shuichi's fishing fleet was slowly approaching the cod fish that he had just discovered. When Minamino Shuichi was still a few nautical miles away from the fish, he was surprised to find that he was actually taken first!
Just now, as soon as Minamino Hidey discovered the fish school, he hurriedly started the boat, and did not switch his vision to check the fish school. Anyway, he felt that the school of fish could not escape and was too lazy to check it.
But now, when he came to the vicinity to take a look, he saw a large fishing team fishing for the cod fish that the system suggested to him before!
These are all things Minamino Shuichi knew in his heart, but the sailors on the fishing boat were different from Ishida Yu. When they saw the 20 fishing boats a few nautical miles away, they all exclaimed.
"Which fishing port is this fishing team? It's so big, there are 20 boats in total, my God!"
"It should be a temporary joint fishing team. Otherwise, how can a fishing team have as many as 20 fishing boats. A dozen fishing boats are enough. Like the fishing team in our Nemuro fishing port, ten fishing boats can't It's over," guessed one of the sailors.
"Huh, no, they seem to be the fishing team of our Nemuro fishing port."
"Ah, by the way, I know, they are the American Emperor Ocean Fishing Fleet just established by the American Emperor Ocean Fishing Company! I didn't think they were just formed, they were recruiting people a week ago, and now they are going out to sea to fish, It's really fast." Ishida Yu exclaimed with wide eyes. Obviously can't believe it.
"It turned out to be them!" Minano Shuichi murmured. However, he was a little puzzled. How could the fish that he discovered were preempted by these guys?
"Is it a coincidence? They were catching the fish when they found it, or did they find the fish before me!" Minami Hideichi guessed in his heart.
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