It's really uncomfortable to stay on a small fishing boat for a long time. I occasionally go to a big boat to get some fresh air.
Traveling all night, we stopped the boat early the next morning for dinner.
Chen Yuan also changed shifts with Yang Xun and the others, and were already in the north of Bashi Channel, where the flow of sea water was obvious.
"What to do?" Zhou Sheng asked when he saw a fishing boat not far away.
Chen Yuan took out the drone and let it fly around. There were obviously many more biological signals in this sea area: "Is the fishing boat opposite a gillnet boat?"
"Probably so." Zhou Sheng shrugged.
"Let's go look elsewhere." Chen Yuan controlled the drone to fly north.
Zhou Sheng raised the accelerator and kept up with the drone.
The drone flew for more than half an hour, and when he was about to take it back, he suddenly received a large number of biological signals.
"We found it." Chen Yuan pointed the direction to Zhou Sheng, controlled the drone back, waited for the ship to stop, replaced the drone with a set of batteries, and continued to release the drone.
So long.
Zhou Sheng also understood the working principle of remote sensing fish detection.
Living things emit electromagnetic waves, and the remote sensor receives these signals and feeds them back to the display.
The advantage of remote sensing fish finder is its large sensing range. It also has the disadvantage that it cannot tell what kind of fish it is, and it cannot even judge its approximate size.
Even a large school of tuna is no different from a group of small fish to a remote sensing fish detector.
I can only see how much, but I can't tell the size.
But with its large sensing range, this thing is an artifact.
As for detecting the location of fish schools, you need to lower the height of the drone to find the signal source.
After finding the fish school, use the fish finder on the fishing boat to calculate the size of the fish.
The fish finder of the Shengyuan fishing boat is quite good and can be accurate to about 10 centimeters. This is much better than the radar fish finder used by fishing boats.
The signal sources on the remote sensing fish detector are densely packed, which is a big fish school.
However, through drone observation, Chen Yuan found that the fish school was not concentrated, so he took the walkie-talkie and said: "Master, speed up."
"Found tuna?"
"It's probably a shoal of flying fish," Chen Yuandao said.
"What's going on with the flying fish school?" Luo Laosi's voice came out.
"A large school of flying fish. The fish are somewhat scattered, so it's best to use a tuna seine."
"How big is the quantity?"
"One net is worth several tons."
"I don't want to buy flying fish, it's too cheap." Lin Xinhai said. Frozen flying fish is very cheap, with the wholesale price being about five yuan per catty.
A few tons of flying fish are not worth much money.
Lin Xinhai's mind is now filled with tuna, and he doesn't want to eat any fish other than tuna.
"There are flying fish and usually tuna, so hurry up."
"It's already the fastest."
Since cooperating with Chen Yuan and the others, Lin Xinhai no longer likes to use his brain. After all, he has also been a captain.
Tuna likes to eat flying fish, and a large school of flying fish can easily attract tuna.
Chen Yuan and the others haven't reached the fish school yet, so they don't know if there are any tuna. If they are lucky, there might be a big tuna school.
"Should I come over here?" Luo Laosi asked.
"Just come here slowly and use the radar to find fish. The fish are very scattered, so you can catch the fish if you come here."
"Okay, I'll go there slowly."
Xinhai ran at full power and only ran a little over 14 knots, just like an old lady taking a walk.
The Shengyuan fishing boat had already arrived near the fish school. Chen Yuan quickly took the drone back, took over the driving position, and adjusted the fish detection screen.
The vertical fishing line showed that the fish were concentrated within twenty meters, and no big fish were seen.
Chen Yuan drove his fishing boat around behind the flying fish, and finally several big fish appeared on the screen. Seeing this, Chen Yuan suddenly became excited: "Master, there are tuna."
"Coming, coming." Lin Xinhai said: "How many?"
"I only see three now. This fish school is too scattered. There must be more."
Zhou Sheng patted Chen Yuan, and several larger fish appeared on the screen: "What kind of fish is this?"
"It should be the Ghost Head Sword." Chen Yuandao.
The shape of the fish cannot be displayed on the fish finder screen, only the length.
I just saw a few 'tuna', all over 1.5 meters in length.
The several big fish now appearing in the picture are all between 0.5 meters and 0.7 meters in length. They are estimated to be ghost heads. Of course, in addition to the length of the fish, there is another reason for judging whether these fish are ghost heads. These few
The newly emerged big fish is moving straight up and down.
If it is tuna, it is unlikely to move like this when it is not frightened.
There is another more important reason. There are many flying fish in this sea area, and there are also many ghost-headed knives.
As for tuna, it really depends on luck.
In the South China Sea, there are hundreds of tons of tuna on the net, but you may not encounter them only once a year.
Chen Yuan naturally also has expectations for a net of 100 tons, or even 200 tons.
People always like to dream and have a good wish.
Chen Yuan scouted the periphery of the group and saw only 7 large fish that were suspected to be tuna. Then he pulled down the throttle of the fishing boat, kept the speed at a low speed, and drove the fishing boat into the center of the fish group.
"There are also big fish." Zhou Sheng stared at the fish detection screen, feeling a little excited.
"These big fish are so spread out."
"Gather at the shallow level and call Uncle Luo to speed up."
Chen Yuan said 'hmm' and picked up the phone: "Uncle Luo, I've received your reply."
"received."
"You should also speed up and come over. This school of fish is too scattered. There are tuna below the school of fish, but they are all scattered far apart." Chen Yuandao.
"OK."
Luo Lao No. 4 has always been cruising, but its cruising speed is a little more than 13 knots, which is not much slower than the Xinhai No. 4 with full power. It can run 17 or 18 knots with full power.
After Luo Laosi accelerated, he arrived before the Xinhai.
"We are helping Master lower the net. Uncle Luo, can you do it yourself?" Chen Yuan took the walkie-talkie.
"No problem, I will put down the assault boat and then I can finish lowering the net."
There are skills in setting up fishing nets. If there is no assistance from a large boat, you must consider the wind direction and water flow when setting up the seine net. Use the water flow after the seine net is lowered to bring resistance to the fishing net, and use the power of the fishing boat itself to drag the fishing net down to complete the encirclement.
.
"After Master comes, you can divide the work and launch the net at the same time." Chen Yuandao.
"Okay." Luo Laosi looked at the fish detection screen in the captain's cabin: "The big fish are too scattered. My seine net is only 130 meters deep and 1100 meters long. I guess it can only surround a group of big fish."
"Try to surround two groups."
The tuna here are probably in small groups, mostly in groups of three or five, or even individual large fish.
The largest group, the one I saw just now, only has 7.
However, Lin Xinhai's fence is large, covering an area of several hundred acres in a circle.
Once we have a good circle, we should be able to get more than twenty tuna.
Seeing that Lin Xinhai hadn't come over yet, Luo Laosi complained on the intercom: "Hurry up, really...it's a good thing there are no other fishing boats here, otherwise you wouldn't even be able to keep up with the heat."
"You're the one eating shit." Lin Xinhai was sitting in the captain's cabin, staring at the console with great anxiety. The speed of this ship was beyond words.
I didn't think so before.
Now follow Chen Yuan and others out to look for fish. Every time Chen Yuan and others find fish, they have to wait for a long time.
"Hurry up." Luo Laosi is feeling a little better now.
There is no fishing boat nearby, but there is one in the distance. The flying fish swims fast, and the trajectory of its movement is exactly that of the fishing boat in the distance...
Hearing Luo Laosi's constant urging, Lin Xinhai's mentality exploded: "Don't rush, it's the fastest."