In fact, to understand the impact of camouflage, we must first understand a concept - angular division.

The arc minute is actually a geometric concept, 60 arc minutes is equal to 1 degree. The maximum resolution of the human eye is 1 arc minute.

If there is a disharmony between the camouflage target and the surrounding environment, then a person with normal vision can distinguish an object of 2.5 centimeters in size with the naked eye at a distance of 90 meters.

Even at a distance of 180 meters, as long as the vision is normal, it can still distinguish objects up to 5 centimeters in size. At a distance of 360 meters, the resolution accuracy of naked-eye observation is expanded to 10 centimeters.

But even so, the ability to observe with the naked eye is terrifying.

By analogy, if the target is viewed too far away, at an angle of less than one arc minute to the observer in the entire field of view, then the naked eye will not be able to distinguish the lurking pretender.

While distinguishing distance, the impostor must also be familiar with the color scheme.

It's a big problem, and it's a fatal problem.

For example, if a black square with a side length of 2.5 cm is placed on a white background, it can be clearly distinguished by the naked eye at a distance of 90 meters.

The two factors overlap and refer to the experimental results of the relevant parties in this regard.

At a distance of 460 meters, it is difficult for the naked eye of a human to distinguish a target of 12 centimeters.

460 meters, which does not seem to be a very long distance for a sniper.

Because the theoretical range of many sniper rifles is 800 meters, it is completely possible to stretch the sniper distance to 500 meters, so that the enemy cannot recognize itself.

However, human technology has greatly extended this value - 20 times that of an ordinary observation telescope is very common, and at 20 times the magnification effect, it is theoretically possible to achieve the goal of 0.25 centimeters at a distance of 460 meters.

In the past, when the field troops were training and exercising, the comrades-in-arms liked to insert some grass on the steel helmet, or make something like a headband out of plants and wear it on their heads.

But after coming to the special forces, Zhuang Yan discovered that this simplest camouflage was simply fragile in front of the observer.

Just like Zhang Yuanyi and Chai Yifa's group just now, they are also dressed in auspicious clothes, and their faces and hands are smeared with camouflage oil paint, which is replaced by the former field troops, this is a camouflage technique that is too awesome not to want.

It's a pity that in front of King Han Yan and a group of comrades-in-arms from Class B, who are also special forces, they have only climbed to a distance of 800 meters and have already been discovered.

Just because the black on a pair of combat boots reveals its location, the telescope is simply too threatening for a sniper.

After understanding this, solemnly understood why in the sniper target order list, soldiers with observation instruments belong to the priority level, because that is the enemy's eyes, and if you kill the observer, the other party will become blind.

Now, it seems that nothing can be done.

Zhang Yuanyi and Chai Yifa's group is finished, and in this jungle, there are still four groups of people in Class A, including themselves, who survive.

Time passed slowly, and there was only one hour and twenty minutes left.

Solemnity can only wait.

No, no, no.

A sniper must have better patience than normal people.

If the enemy does not move, I will not move.

It's like a snake hidden in the shadows, quietly staring at you, watching you, and when you show a flaw, it suddenly strikes and hits the key point in one bite.

The two of them lay on their stomachs behind the tree, one left and one right, and after a while, solemnly said: "Lao Yan, give me the observation scope, my scope is not very easy to use, the field of vision is too narrow, and I can't see clearly." ”

Solemnly handed the binoculars to solemnity.

Slowly swept around, and then looked at the sky.

Fuck it!

The weather doesn't seem to be changing.

It seems that Zhang Yuanyi's team was anxious just now, and it is estimated that they did not consider waiting for the sky to get dark, but because they couldn't wait, and felt that the weather would not change, so they simply took a risk.

As a result, under the powerful observation and monitoring capabilities of the observatory, they immediately became cannon fodder.

Majestically is not going to act rashly now.

Isn't there still an hour left?

Then wait.

Sniping and sniping, sometimes it's often against patience.

Whoever has good patience, who controls himself, and who sees the flaws of the other party first will win the duel.

Although Zhuang Zhuang felt that he really didn't have much chance of winning in the confrontation with Han Zixuan, who knows?

Class B and Han boasted that although they were telescopes, they had different angles.

Han Zixuan can't always stare at one angle.

As long as Han Yanwang's attention is not on the other three sides, he may be able to break through.

He felt that he should look for the weakest place to start.

Now, he prides himself on observing the lookout little by little through his binoculars, rather than looking at his surroundings.

The terrain and scenery of this place have long been deeply imprinted in his mind, and he remembers what that little shrub looks like.

Now, what we have to look at is the flaws of Class B and Han Zixuan and others.

It is a human being who has flaws, and I firmly believe in this.

Although Han Zixuan is the captain, although he is a veteran sniper, but the tiger also has a nap, doesn't it?

Not to mention that this place is so big, he is not a robot, he has eyes on the back of his head.

Zhuang Zhuang had an idea in his heart, avoiding Han Zixuan's gaze to find an entry point.

Class B is full of players who join the team at the same time as themselves, and these people can be solemnly placed on a level to coach and measure.

The biggest problem lies with Han Yanwang, Zhang Zhiang and Yan Guanguan.

One of these three is a captain, an officer, and a master; The other is a parachute expert and an eight-year veteran, and he is also a difficult master to mess with.

In the end, it is Yan Champion.

Yan Guanguan has three years of military experience, and he is the same as his squad leader Luo Ping'an.

According to the solemn observation, the three men each occupied one side and observed with the other team members.

Occasionally, I will look back and look in other directions, and change my observation position.

In this way, like a patrol in the barracks, if you want to go in and touch the sentry, you have to avoid the patrol, and it is best to find the gap where they will take over.

As long as there is a shift handover, there is a gap.

The three bulls looked at three sides, but there was only one side where the people of Class B were monitoring, and even if the three of them occasionally switched, there was definitely a time difference.

A bold idea suddenly took shape in the solemn mind.

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Last night, I don't know who talked about a long-standing rumor in the VIP subscription group - special forces like to use sanitary napkins as insoles when marching.

I don't know where this rumor came from, but it has been spreading on the Internet, as if it looks like it looks good to use a female aunt towel as an insol. I've heard this rumor for so many years, and I'm noncommittal.

Because I don't bother to explain, at least I've never tried to survive in the wilderness, or to train long distances or to run long distances—remember, to pad the soles of my shoes.

We discussed it for a long time last night, and I analyzed the unreliability of this rumor based on my own experience.

First, it is true that the aunt towel absorbs water, but the water absorption will swell, can you imagine that your shoes were originally very close to the feet, but the aunt towel was put in, and it expanded after absorbing water, you will grind your feet, it will be uncomfortable, and long-distance walking is not conducive to blood circulation in the feet. Don't even think about it!

Second, field training or long-distance running, pulling training is not a flat road, not a road, but a mountain road, on the way to a variety of jungle shuttles, and even sometimes to cross the mud river, to swim across, etc., may I ask my aunt to put the towel in the water and soak it up, what is the taste? I haven't used it, but I can imagine what it would be like to try it.

Third, such a thing is not allowed in the internal affairs of the troops. I think the most famous is the muzzle of the US military sleeve back then, this is scientific, no problem. But if the aunt towel enters the barracks...... I can't imagine this state, the picture is too beautiful...... I don't dare to think about it. In the strict army, there are strict requirements for the placement of items in the lockers, such as when we were in the past, clothes had to be folded into small squares, books and notes, as well as belts and armed belts, as well as the placement of bits and pieces.

Spot checks are divided into regular checks and irregular checks. Regularly usually once a month, if it is not irregular, then I don't know, happy to come once. In the past, we had a staff officer from a military commander from somewhere, and suddenly drove into the barracks, looked for the captain, and then directly blew the emergency assembly whistle, and all the people came out to line up and stand, and the staff officers took the inspectors to search the rooms one by one to see if there were any prohibited items in the cabinet (because our unit has been shooting live ammunition for a long time, so we are afraid that the soldiers will keep and hide ammunition privately, this is the key to this).

But the illegal items, such as radios, BB machines and the like, are also confiscated, and serious criticism and punishment, you can imagine what kind of expression the superior inspection staff officer came to find a large pile of female aunt towels in the drawer?

It's funny to think about, right?

Later, a few friends in the group who like hiking and mountain climbing and cross-country discussed for a long time, among which the "storyteller" brother likes to hike, and has also done experiments with his aunt's towel, and found that the "easy to use" in the non-rumored ones is, his original words are, when he just pads in, it is very dry (of course dry!) Otherwise, how do people write advertising words? ), and then step on it soft (the texture is good!). Is it rough and rough, who buys it? Is that still called an aunt's towel? It's called sandpaper. ), and then start hiking, with all kinds of slips, curls, and uncomfortable soles on various terrains...... (exactly as I imagined)

Therefore, I will not make up my mind, but I declare that I have not seen a single unit, including a special brigade that exercised and trained together in the past, used a single aunt's towel as an insoles. Those who spread this rumor with relish, or some soldiers who have been soldiers but have not been in the special forces say that they have used it for the sake of face, don't talk about it in the future, this kind of thing, really veterans will laugh when they hear it.

Later, the group members in the group were still old and explosive (I forgot, don't hit me...... Having said, the earliest rumor he could find out was that the mold soldiers went to fight in the hot terrain, and put their aunt's towel in the helmet to absorb sweat and keep the inside of the helmet dry! Later, for some reason, there were rumors that my aunt's towel was used as an insoles......

Put it inside the helmet? This is reliable! When you sweat a lot, the sweat will seep into your eyes, and it is easy to make people blink when aiming, and you will lose the opportunity to shoot, no problem!

I'm in favor of putting it in a helmet, but in our Chinese culture, I think it's ...... to put such a thing on the head Maybe Eagle Sauce's beliefs are different, and people believe in the Virgin Mary...... In my case, I'd rather put my daughter's diapers......

SO, if anyone tells me that my aunt makes an insole and asks me if I have done this before, I will be anxious! I'm not that mentally retarded!