As night falls, the east side of Shiratori Island comes out to the sea.

Several tired soldiers came out of the woods and sat down on the ground.

"Exhausted ......"

Diao Ke threw the backpack to the ground, and the person lay directly on the sand.

took out the kettle, unscrewed the lid, and Niu Shilin next to him came up and kicked Diao Ke's foot.

"How much water do you have?"

Diao Ke shook the kettle and said to his squad leader, "There is still half." ”

"You're drinking a little too much." Niu Shilin said: "Fresh water is consumed too quickly. ”

Diao Ke was a little embarrassed and brought the hukou to his mouth, took a sip lightly, and then said: "Squad leader, it's already very provincial, you see that we have walked almost forty kilometers today, right?" And it's so hot, it's not bad to drink only half of the water. ”

He would look back at his Xinjiang comrade-in-arms behind him, Kuxi. Darbek said with a smile: "Xiaoku probably drank all the water." ”

Niu Shilin was stunned for a moment, reached out and grabbed Kuxi's kettle, shook it, and clanged.

"Am I going to save as much as I can along the way? I can't stand it, so I drink something to moisten my throat! ”

Cousie said with a bitter face: "Squad leader, I love to sweat so much, if I don't drink water, I will be dried by the sun." ”

Niu Shilin sighed and threw the kettle back to Coussy.

Lin Sheng, the deputy squad leader, leaned over to Niu Shilin's side and asked, "It seems that we have only found 5 points today, and the progress is a little slow." ”

"That's right." Niu Shilin took out the map and compared it with the target points above. The dots that had been found were circled by him with a blue pencil.

There are only 5 blue circles on the map.

This means that the remaining 30 points must be found over the next four days.

"This time, our deputy company commander is giving us a problem." Niu Shilin said: "The water source is not given, and the target points are almost twice as many as before, and the target objects are becoming more and more difficult to find." ”

Lin Sheng also agreed with the words of the squad leader Niu Shilin.

The reason why only 5 targets were found this afternoon was because the target items were too well hidden.

One of the old 56 cartridge belts was actually hanging from a tree, more than four meters above the ground.

The cartridge belt is green, and the people of Class 1 arrived at the target place, checked the coordinates and terrain and everything, but they couldn't find the target item.

I had been looking for this bullet belt for a full hour just there, and finally it was also Diao Ke who was lying on the ground resting and accidentally saw it.

Although similar training has been carried out in the past, the placement of objects in the past is generally very obvious, and they are never hung on the treetops, and most of them are either pressed on stones or nailed directly to the trunk of the tree, which can be seen at a glance.

However, it is not my turn to be dissatisfied with the training standards, I am a soldier and can only obey orders.

No matter how difficult or troublesome it is, you have to complete the task to the letter.

What's more, this kind of reconnaissance and search training is very capable of training people, and there may be such items in future martial arts competitions.

"Squad leader, I'll take a few people to the beach to find something to eat." Lin Sheng couldn't help much, now that it was dark, he wanted to find something to eat.

There were only five compressed biscuits on each person.

In other words, the daily supply in the future will only be one compressed biscuit.

For the rest, it's all up to these people to get local materials.

But fortunately, the reconnaissance battalion is stationed at the seashore all year round, and the field survival training is not overnight.

There are more things to eat at the beach.

"Okay, you take a few people to find food, and mine to get some water."

When Lin Sheng went to the beach with a few soldiers, Niu Shilin beckoned Diao Ke and Kuxi: "Bring a shovel and a rain cloth and follow me." ”

He turned to the other soldiers and said, "You guys, set up tents, gather firewood, and we'll deal with it here tonight." ”

led Diao Ke and Kuxi to find a flat land, and Niu Shilin squatted down with a sapper shovel and dug a shovel on the ground.

The sand is easily dug up.

"Okay."

He muttered to himself and nodded.

Diao Ke said: "Squad leader, what method are you going to use to get water?" ”

Niu Shilin said: "I think this place is quite open, and we will build a few distillation pits later, and we will have water to drink when we get up the next morning." ”

In fact, the distillation pit mentioned by Niu Shilin is a method of obtaining fresh water through filtration and distillation.

The practice of the distillation pit is simple.

Find a place to dig a pit about 1 meter in diameter and about 0.5 meters deep, and then dig a trench about 10-15 cm wide and 20 cm deep along the outer edge of the entire round pit about 20 cm, and prevent a container for water at the bottom of the pit - you can use a helmet with a helmet, you can use a military basin without a helmet, or find a bamboo, cut a section, and dig an opening on it as a container.

After placing the container, cover the top of the pit with a rain cloth and press it with sand and stones around it to seal it tightly.

After that, put a stone in the center of the tarpaulin and let the middle of the tarpaulin collapse into a funnel shape.

The purpose of this is that the water distilled from the pit is blocked by the rain cloth, and after condensing on the rain cloth, it will slowly concentrate along the rain cloth at the lowest point - that is, the center of the funnel, and when the water condenses to a certain extent, it will drip down and drip on the water container at the bottom of the pit.

Of course, there are many ways to use the distillation pit, but it is not just that the pit is dug and there will be water, if you are in a jungle area, you can put leaves and plants in the pit, or even mash them to let the water out.

And by the sea, it is even simpler to get water.

This kind of pit is also used to pour seawater or some sewage into the ditch next to the pit, and the seawater and sewage will slowly seep into the soil and then into the pit.

When the soil in the pit reaches a certain humidity, it is easy to produce water vapor that rises during the high temperature in summer, which will also be collected by the rain cloth and drip into the container at the bottom of the pit.

More importantly, this mode of distillation pit can filter sewage impurities, can desalinate seawater, and after the effect of sand filtration and distillation, the water obtained can be directly drinkable.

Under normal circumstances, this is a water intake mode commonly used by special forces or reconnaissance units in the field, and even in harsh environments such as deserts and Gobi deserts and salt lakes, but in the desert the condensation method is used instead of this filter distillation method.

When the squad is surviving behind enemy lines, if there is a lack of fresh water, this distillation pit can be used, dug at night when resting and camping, and then at least 200 ml of fresh water can be collected in 8-10 hours, and at the highest time it can even collect nearly 1 liter of fresh water.

This fresh water is enough for a soldier to use in a day.

If you save a little drink, even two people will be enough.

It is close to the sea, and seawater is easy to obtain, so if you pour more water into the ditch next to the pit to make the pit humid enough, then the more fresh water will be collected.

There are 10 people in my class and 10 tarpaulins, but they need to sleep at night, so they can only take out five to collect fresh water.

By tomorrow morning, it is estimated that about 2,000-10,000 ml of fresh water will be collected, and it is estimated that it will be able to survive the day by looking for some other wild fruits to provide water.

Just as the soldiers of the 1st Company were camping at their respective rest points and began to look for food to fill their bellies, in the camp of the coastal defense company on the island, Yan Yan, his instructor Zhao Huanbin, and several platoon commanders were sitting under the big tree in the camp area.

"It looks like it's almost time."

Han Douya looked at his watch, raised his eyes to look at the solemnity, and reminded him.