If it is a little more advanced, it can reach a range of 30 km.

In the vast Pacific Ocean, such a detection distance is obviously useless.

The vast ocean, the distance between east, west, north and south, is calculated in 10,000 kilometers. What is the use of you probing a 30 km top.

However, if you want to increase the detection range of sonar, you have to increase the power. That's a lot of power. The average ship boss is unwilling. The cost is too high.

In the past, everyone used the simplest single-beam wave sonar, and the results were not very good.

Later, it was developed to multi-beam sonar, and the effect was improved. But it's still not ideal.

Later, it developed into electronically scanning sonar.

The scanning sonar works great. The information feedback is relatively accurate. But it also consumes a lot of power.

The more beams emitted, the more information is returned.

The farther the emitted beam travels, the more information is explored.

And all of this requires strong power support.

The MiG-25 fighter's radar is turned on, and it has a lot of power and is capable of roasting a rabbit two kilometers away.

Fishing boat sonars are not as powerful as radars. However, the consumption capacity of seawater is much more powerful than that of air.

With the same power, the radar is capable of exploring 1000 km. And sonar may be less than 100 kilometers.

At present, the multi-beam wave and electronically scanning composite sonar of the Thunderbolt and Thunderbolt are about 50 kilometers away. The amount of electricity it consumes is already considerable. Fortunately, the amount of power required by the sonar can be provided by the Rock 500, which is basically free of cost. Otherwise, it is absolutely impossible to turn on the sonar 24 hours a day.

What does that mean?

Just before the typhoon arrives, use sonar to catch a few big schools of fish, catch a handful and leave.

If it were an ordinary fishing boat, such a dangerous thing would definitely not be possible.

You know, typhoons often move faster than fishing boats. Ordinary fishing boats must take shelter as soon as possible.

It seems that a typhoon as fierce as a butterfly must be very destructive. If it is caught up by a typhoon, the fishing boat is absolutely doomed. Even if it is a 7,000-ton warship like the Shinno, if it is not necessary, it will not go head-on with the typhoon. Even if you carry it, you will definitely suffer huge losses. The radar, masts, and communication antennas of warships are all relatively fragile.

Even the Nimitz-class supercarriers of the US imperialists, in the event of a major hurricane, are very dangerous. Often the losses are not small.

The Thunderbolt and Thunderbolt, both with a speed of 40 knots, can definitely outperform the movement speed of a typhoon.

Moreover, with the strong power of the Rock 500, even if it encounters an eight-level wind, it is enough to escape with confidence.

After all, less than 400 kilometers to the west of the Diaoyu Islands is the port of Fujian Province. If necessary, you can go over there to take shelter from the typhoon, and it's fine.

"Everyone said, do you want to do it?"

"!"

"!"

"Good!"

The Thunderbolt adjusts course. Head southeast at high speed.

It needs to get to the edge of the typhoon as soon as possible. Then go to the net. Then the net is raised. Then pack up the guys and hurry away.

"Those guys ......," Ge Ming praised, "I'm really not afraid of death!"

"It's that Wang Bu'an again!" Xu Ban shook his head.

Who do you say is to blame?

It's not Lei Zhenzi.

Not a thunderbolt.

It's not an old monster either.

It's the harmless Wang Bu'an.

It was he who gave the two fishing boats the ability to dare to defy typhoons. Relying on the advantage of speed, it is against the typhoon.

With the broadcast of typhoon information, all the fishing boats in the surrounding waters have returned to the port to take shelter.

Only the Thunderbolt and Thunderbolt are still here trying to pull their teeth out.

Xu Ban didn't stop either.

He knew the plan was feasible.

He, Captain Lin Chengji, and Deputy Captain Fan Qixiang all calculated that as long as the operation is good, it is still relatively safe.

After all, the speed of a typhoon will certainly not reach a high speed of 40 knots.

As long as you can outperform the typhoon, you have a chance to win.

Sure enough, the Thunderbolt had only just traveled less than two hundred kilometers before the sonar made a discovery.

Dense echoes. After judgment, it must be a big school of fish.

Judging by the radar information, their current location is almost on the edge of a typhoon.

Wang Bu'an stood on the deck, and he already clearly felt the gust of wind strengthening. Sometimes, gusts of wind even reach level 8 or higher. The stagnant water on the deck was blown all over the place.

It seems that if he is such a weak little body, if he moves on the deck, he must firmly grasp the railing.

Otherwise, gusts of wind may blow him straight into the sky.

As for whether it can be found after falling into the water, only God really knows.

In order to avoid accidents, he obediently stayed in the engine room.

This is also his basic duty.

Ensure that the power system is stable and reliable at all times.

"It's dry!"

"It's dry!"

"Everyone is in place!"

"Chief Engineer Wang, please go back to the cabin and rest, it's too dangerous here!"

Lei Zhenzi shouted loudly.

The Thunderbolt began to adjust its position.

The Raiden also began to adjust its position.

Based on the sonar's judgment, they decided to take a turn to intercept the fish.

Twin ship operation.

The next oversized purse seine net.

The Thunderbolt serves as the main operating vessel. The Thunderbolt served as an auxiliary work vessel. Practice makes perfect.

The speedboat pulled the other end of the purse seine to the top of the Thunderbolt.

The cranes of both ships began to unload the net.

The purse seine is big, big.

It is conservatively estimated that after sinking, the fishing area will be at least hundreds of thousands of square meters.

As the fish pass by, the crane quickly pulls up the thick ropes around the purse seine net.

As long as the speed is fast enough, some of the fish are trapped in the purse seine net.

Of course, this is just theory.

There's a lot of work into the details.

For example, the timing of the network is very particular. It was early, and the fish did not enter. It's late, and the school of fish is overdone again.

Another example is how to quickly clean up the fish inside after the net is lifted.

Fish are fleeting, and every minute counts.

The speed is fast, and you can also play a second net.

If the speed is slow, you can only watch the big fish disappear into the depths of the ocean.

Fortunately, Wang Buan doesn't need to know this.

He just needs to know that there will be a big harvest soon.

His only task on board was to ensure that the power systems of the two fishing boats were not malfunctioning.

This is the most critical.

Don't forget, a typhoon is nearby.

If the power system fails at this time, they will definitely be doomed. The new ships were too late to rescue.

This is also the reason why Wang Bu'an will be pulled onto the boat.

The powertrain is designed by you and produced by you, and of course you have to endorse it.

How to endorse?

The best thing to do is to get on board in person.

If there's a problem with the powertrain, you're going to have to yourself.

"Stop!"

"Stop!"

Soon after, the purse seine was lowered to the bottom.

The depth is actually less than 500 meters. But it is enough for most of the fish.

Purse seine fishing targets are mainly clusters of pelagic fish (such as large yellow croaker, small yellow croaker, mackerel, mackerel, sardines, etc.). If you're lucky, there's probably tuna too.

However, in the Pacific Ocean, tuna appears to be relatively small. There don't seem to be a lot of salmon or anything like that. It's hard to catch.

In short, neither the Thunderbolt nor the Thunderbolt had caught much tuna or salmon before.

Unless it's particularly lucky. Otherwise, there is no hope.

However, every fisherman wants to be able to catch tuna.

Why?

Tuna is worth a lot of money!

The CIF price is more than 100 yuan per catty.

If it is a good look, there are no scars, or if it is a rare variety, the price is more expensive.

The problem is, tuna is really not easy to catch.

It is difficult for ordinary fishing boats to spot them.

Even if you find it occasionally, it's hard to react. By the time they reacted, the tuna had already run away.

Tuna swim extremely fast, with an instantaneous speed of over 160 kilometers per hour and a steady speed of 60 kilometers per hour, which is faster than the average motorcycle. It's like an arrow in the water. I encountered it by chance, and it disappeared with a whoosh.

"Didi!"

"Didi!"

The echo of the sonar is very dense.

Lei Zhenzi cautiously judged the location of the fish. Wait for the time to start the net.

The people around are also secretly praying for a good harvest.

If it's tuna, it's fine.

If you have a net of tuna, you will definitely make a lot of money.

However, when they calmed down, everyone knew that it was impossible. If tuna is so easy to catch, will it still be so expensive?

At any time, it's rare and expensive. It's good to catch one or two. That's enough gas money.

Well, no, the current gas money is negligible.

"Whoa!"

"Whoa!"

Suddenly, a large fish jumped out of the water and splashed snow-white waves.

Wang Buan saw very clearly in the engine room. Definitely a big fish. Silvery-white. At least three or four hundred pounds.

"Tuna!"

"Tuna!"

Several people screamed in unison.

But they are sharp-eyed, and they also see it. Moreover, they identified the tuna that jumped out of the water.

This is a terrible time.

Everyone seemed to have been beaten with chicken blood, blood was surging, and their eyes were red.

Tuna!

There really is tuna!

Moreover, it is tuna weighing several hundred pounds. Extraordinary value!

This large tuna is often found only in the depths of the Pacific Ocean. You can't usually see it at all. Unless there are some external factors that can force them out.

Take, for example, tropical cyclones.

They must have been brought out by the Typhoon Butterfly.

"Pick up the net!"

"Pick up the net!"

Lei Zhenzi gave the order.

The crowd immediately pressed the electric switch and pulled up several of the main ropes.

Pull the rope first to trap the fish in the net.

"Whoa!"

"Whoa!"

Suddenly, more big fish jumped out of the water.

At this time, everyone can see it clearly. Indeed tuna is undoubtedly. Moreover, it is a large tuna.

"Tuna!"

"Tuna!"

"That's a lot of tuna! We're making a lot of money! We're making a lot of money!"

"Work hard!

Today's third update. Keep asking for a little referral vote. Thank you.