Bi Fang and Harley marched along the river, trying to find a shoal or land to cross, but after walking for more than half an hour, they could not find a suitable place to cross the river.

Harley, who had been walking for a long time, felt a little tired and lay down on the ground, refusing to move any further.

Seeing this, Bi Fang had no choice.

Faced with the big river full of crocodiles in front of him, he had to find another way to cross it.

"Katsa."

An arm-thick trunk was broken raw, and if the length was suitable, Bi Fang tied it parallel to other trees with a rope to form a row.

Source change app】

Judging from the shape of the wooden arrangement, it is obvious that it is a simple raft.

"We couldn't find a suitable place to cross the river directly, and if we wanted to continue north, we had to build rafts to cross the river."

If it was another river, Bi Fang chose to swim with Harley.

But this is Africa, and the rivers are full of fierce Nile crocodiles.

"In many wildlife documentaries, we often see Nile crocodiles lurking in rivers hunting, but there are only a handful of chances that they will be able to eat animals in a year."

"For the overwhelming majority of Nile crocodiles, they only have two big meals a year, both of which are associated with the Great East African Migration."

"The animals eat once when they go and again when they come back, and that's the only two meals that most Nile crocodiles have."

[Isn't it, just eat two meals? 】

[It's so outrageous, two meals a year, won't you starve to death? ] 】

[I was so scared that I quickly pulled two mouthfuls of rice]

"They don't starve to death, Nile crocodiles are extremely hungry tolerant, they can prey on a zebra, and after a full meal, they will not eat for more than half a year."

"In order to escape the unfavorable living conditions in Africa's dry season, Nile crocodiles often dig burrows in river banks with their mouths and feet, and hide underground to hibernate until the next rainy season."

"Sometimes they can dig up to 12 meters into the ground, which is the deepest known animal can dig with their bare hands."

"So I definitely don't dare to swim down the river, before the great migration of animals arrives on a large scale, every one of them is hungry, and will not let go of any large living creatures."

[Nile crocodile: Brothers, come to life]

[Poof, poof, crocodile: what's the b-movement?] 】

"You know, the number of Nile crocodiles attacking people is 275 to 745 per year, of which more than 63% are fatal, the average size of the Nile crocodile that causes non-fatal attacks is about 3 meters, and the average size of the Nile crocodile that causes fatal attacks is 3.5 meters, and they are considered to be the largest large wild animals that kill people in Africa."

"By comparison, from 1990 to 2006, lions were estimated to have caused one-eighth of the deadly attacks on humans in Africa compared to Nile crocodiles."

【Death Spin Spin!】 】

[Bitten by a crocodile, that's not a direct dismemberment]

[It's too scary]

[Terrible]

Bi Fang bit the rope, stretched the rope straight, and interspersed his fingers to tie the wood tightly.

There are many dead trees in the grassland, which are good materials for building rafts.

"Rafts can be made with bamboo, small trees with roots plucked, such materials are strong and strong and will not rot, or you can use the topping technique of dead tree trunks, which are buoyant and require less material for the same buoyancy."

"It's even better if you have oil drums around, or objects that can float in the waterfall, which can be used to support the raft and float the waterfall."

"I really can't find wood, and a piece of tarpaulin or other waterproof material can also be used to make a light boat that carries people."

The sun was a little big at noon, and under the non-stop work, sweat began to appear on Bi Fang's forehead.

Beads of sweat slid down his sideburns and down his jawbone, dripping down the whitened dead wood, leaching a small patch of dark color.

A large number of trees of uniform thickness are juxtaposed, and they are firmly tied one by one with bark ropes the thickness of the little finger.

Now Bi Fang has become more and more proficient in making ropes from fiber, and can make bark ropes that are one meter long, the thickness of the little finger, and the strength of the tree are large enough in one minute, so that the completion progress of the entire raft is greatly accelerated.

"The water system of the river in front of us is still quite complicated, from the geographical and directional point of view, I guess it should be the Tana River system, or one of its branches."

While building a raft, Bi Fang can also do two things, introducing the information of the river in front of the audience to the audience.

The width of the river in front of him alone was more than fifty, and the current was not so turbulent that if you didn't pay attention to it, you even thought it had stopped flowing, and in the middle of the river there were scattered patches of land, covered with reeds and grasses as high as a man.

The drone looks down from a high altitude and is completely a swamp.

Such a width, coupled with an unknown length.

A river of this magnitude could never be a nameless "river".

As a professional survivor, you should be aware of the world's famous rivers, and as the world's No. 1 survival expert, Bi Fang is even more so.

"There are many great rivers in Africa, but in Kenya, there are eight rivers that can reach the scale in front of us, but if we reduce them according to the current orientation, there are only two, which are the Tana and the Galana."

"Both rivers have their sources in the Great Rift Valley, and they run all the way down into the Indian Ocean."

"The source is the same and the destination is the same, so if you can't know your specific location, it's difficult to distinguish between the two rivers."

"But we're now in the east of Kenya, south of the Nika Plateau, and in this location, because of the difference in elevation, the river is very fast, and that's the case with the Galana River, and the Tana River should be like that, but it's bigger and flowing, so Kenya built a dam above it to generate electricity."

"Although it is the rainy season, it is far from the time for the dam to release water, and with the buffer of the dam, the flow of the Tana River is much smoother and the water quality is relatively clear, so we can distinguish between these two points and determine that the Tana River is in front of us."

The effects of dams on river velocity are complex, and Bi Fang is simplifying them.

However, there is a reason to figure it out, that is, energy does not appear out of thin air, and hydropower stations use the potential energy of water flow to generate electricity, and the flow rate is naturally slowed down.

[I don't know what to say, it's outrageous, but since it's Fang Shen, let's play it normally]

[Stable play and continue to maintain]

【Call Fang Shen】

[A wave of analysis is like a tiger, one look at the audience two hundred and five]

[I understand, but I don't fully understand]

[Go alone to a 6]

It took about two hours to build a raft about three meters long and two meters wide.

"When riding a raft, everything should be securely tied to the raft or tied to a safety rope."

"Make sure there's nothing dragging on the edge of the raft, otherwise it could break the raft in the shallows."

"At the same time, we have to put a few free ropes on the raft, and when we are in the river, we have to tie the ropes to our bodies, fix ourselves, and act as safety ropes."

"The safety rope should be long enough to allow people to move freely, but not too long to avoid dragging in the water."

"When crossing a rapid, turbulent water and a large drop in a dangerous beach, it is best to untie the safety rope. This way, if the raft gets out of control, everyone can swim to the riverbank. ”

With the rope tied around his waist, Bi Fang found a safe spot and slowly pushed the raft into the river.