Chen Yuan was reluctant to take back the drone, for fear of losing the fish.

The drone was about to run out of power, so Chen Yuan took it back.

There has been no harvest in the past few days, and the spare battery of the drone has not been charged, Chen Yuan quickly dismantled the remote sensing, fixed the bow of the ship, and hurriedly ran back to the cabin to charge the drone. qs

Zhou Sheng looked at Chen Yuan, who was so excited: "Big fish?"

Chen Yuan took a deep breath: "The depth of the fish is about 550 meters."

Zhou Sheng frowned: "Can tuna inhabit at 550 meters?"

Chen Yuan gave him a blank look: "What kind of tuna do you think can stay at this depth?"

"Bluefin tuna, and it's an adult bluefin tuna, and it's relatively large." Zhou Sheng was stunned for a moment: "However, will it be other small fish? Remote sensing of the fish cannot see the size of the fish."

「***。」

"Damn, can you talk about it well." Zhou Sheng saw Chen Yuan's disdainful eyes and felt that his IQ had been insulted: "How can you judge?"

"The strength of the remote sensing signal." Chen Yuan rolled his eyes: "You also saw the remote sensing display just now, and the signal source on it is clear. So, you combine the depth of the water...... At a depth of about 550 meters, what big fish will swarm together."

As soon as Chen Yuan said this, Zhou Sheng understood, and hurriedly picked up the radio: "Master, the water depth is 550 meters, the number is more than 100, and the remote sensing signal is clear, do you understand?"

Lin Xinhai was stunned for a few seconds, and instantly became fanatical: "You guys keep up, don't lose it." I'm at full throttle."

"What do you mean?" Luo Laosi asked weakly.

"The preliminary estimate is that the number of bluefin tuna schools with more than 100 fish is about 550 meters deep, and the average weight of adult bluefin tuna is definitely more than 200 catties."

Then, Chen Yuan heard a "bang", and Luo Lao Si shouted, "Really?"

"Probably so." Lin Xinhai said, "Chen Yuan, are you there?"

"Yes."

"Can you tell if it's bluefin tuna?"

"In this area, apart from bluefin tuna, I can't think of any other large fish that can swim in groups at a depth of 550 meters." Chen Yuan took a deep breath: "Let's follow these groups, you guys hurry up."

"Okay." Lin Xinhai thought for a while, and then said, "Do you judge when these fish will be able to come out of the water?"

"Between midnight and tomorrow morning. The tuna is fast, and if you can't meet us at two o'clock in the morning, you'll have to wait again."

"Okay. What is your current speed?"

"Verse 13."

Lin Xinhai wanted to scold his mother: "Running so fast?"

"The tuna will rest, don't worry."

Lin Xinhai hurriedly calculated the distance between him and Chen Yuan, and then calculated the speed, and in an instant, his whole person was not good.

For a long time, Chen Yuan and they didn't find schools of tuna, and Lin Xinhai has been swallowing them slowly, mainly to save fuel costs.

He is now 7 nautical miles away from Luo Laosi and 42 nautical miles away from Chen Yuan.

During this period of time, not only Lin Xinhai was slack, but Luo Laosi was also the same.

There has been no big harvest for too long, and Luo Laosi is ready to go back at a loss.

Chen Yuan's fishing boat was fast, running twenty knots, nine knots faster than the Xinhai. At the end of the day, the distance casually opened up dozens of nautical miles.

Luo Laosi's side was at full speed, running seventeen knots, close to the speed of eighteen knots. The fishing boat dragged its long tail in the calm sea.

"Shengzai, where are you." Luo Laosi shouted.

Zhou Sheng reported the location and said, "Let's follow the fish, you guys come over quickly."

Bluefin tuna, it is said that the fastest speed is more than 100 kilometers per hour.

In fact, unfazed, bluefin tuna can reach a maximum speed of about 70 kilometers per hour. But more often than not, it doesn't swim so fast.

Normally, it is more than 20 kilometers per hour, that is, more than 10 nautical miles.

Tuna also have to rest and sleep, but tuna have a special structure, and even when they are resting, they are swimming and will not stop.

When resting, if there is a large school of tuna, they will circle in a circle, or move slowly forward.

Chen Yuan is also calculating the speed of the tuna, as well as the location of the Xinhai.

The tuna swims in the direction of Zhongsha, and there are many fishing boats in Zhongsha.

"Gan." Chen Yuan patted the stool.

"What's wrong?"

Chen Yuan pointed to the dashboard of the fishing boat: "Look at this speed."

"Questions?"

"Ask me how far Master is from us."

Zhou Sheng was also stunned, and picked up the wireless phone: "Master?"

"Roger."

"You...... How far is it from us?"

"40 nautical miles."

Luo Laosi asked, "Got a problem?"

"How many nautical miles are you the fastest?"

"About 14."

The tuna doesn't stop waiting for the Shinkai.

If you can't catch up with the fish tonight, you won't be able to catch up with them tomorrow morning.

"What is the speed of the fish per hour?"

"We've done the math here, and 12.5 knots looks like, which is 23 kilometers per hour. These fish don't have the power to ......."

"I can't catch up." Lin Xinhai was embarrassed and said, "When the fish float up at night, you can catch it and drive the fish back."

Chen Yuan let out a long breath.

Bluefin tuna don't stay up to 550 meters in the depths, they slowly rise up, and when they do, the fish will be faster.

That's why tuna fishing boats are required to have a speed of at least 25 knots.

Chen Yuan's head is big: "Go back to catch the fish......

Round-up tuna is usually only done when the purse seine is used. Fish are not sheep, and they can be driven if they say they can be driven.

It was dark.

Half a bright moon, starry sky.

Just after 10 o'clock in the evening, the tuna slowed down and rose to about 300 meters above the surface.

In the second half of the night, the tuna is expected to come out of the water.

There was still time, and after nightfall, the tuna swam much slower and moved in a big circle.

"The tuna are in a circle." Chen Yuan contacted Lin Xinhai.

"Okay, that's good, I'll be there." Lin Xinhai breathed a sigh of relief.

Luo Laosi also breathed a sigh of relief, this school of fish, if they didn't catch up, it would be a joke.

In two months, I guarded such a net. If this school of fish hadn't been encircled, Luo Laosi would have estimated that his blood pressure would have soared.

"How far is it?" Zhou Sheng asked.

"28 nautical miles." Hayashi Shinkaido.

"Okay, the tuna is still 300 meters away from the water, a little faster." Zhou Sheng was anxious and roared.

This is not the surface of the tuna, but the closest to the surface and the best place to cast the net.

"Lao Hai can't catch up, I can rush over." Luo Laosi smiled and said, "I can surround it."

"You're a ball." Lin Xinhai said: "If your boat can surround tuna, what else do you need."

"What do you want you to do, you'd better hurry up."

As Lin Xinhai was talking, the fishing boat suddenly slowed down, and then lost power.

At this moment, Lin Xinhai's scalp was numb: "Old Dong, what's the matter?"

Lao Dong is an engineer and shouted twice but did not respond. Lin Xinhai handed over the wheelhouse to the co-in-boat, trotted out, and saw Lao Dong drinking with people, his face was red.