Based on the above points, what Fan Keqin needs now is the kind of diving device that is very simple, does not affect flexibility, and is the lightest.

And Fan Keqin can completely make this thing by himself, it just depends on your imagination. There are only a few things required, a bicycle inner tube, a thin piece of bamboo, a five-meter-long hose, and isinglass.

It's basically already done.

For a bicycle inner tube, cut out the section that can be inflated, and then use tire repair techniques to connect the two broken ends together. Use tire repair glue and a piece of inner tube to put them on and stick them tightly. Appearance

It's just like a small tire. How big is the circle? It doesn't have to be too big. It only needs to be thirty centimeters in diameter.

Then polish the bamboo piece to be extremely thin and modify it into an irregular shape. Glue it to the front and back sides of the inflated tire. But note that the most important thing is the middle position. Drill a hole that is thicker than your thumb.

, then put the hose through it, modify it with isinglass and fix it, and that’s it.

The material of the hose is similar to that of the tubes used for hanging needles in this era, but it is thicker. If it is too thin, the oxygen to be breathed will not be enough.

The five-meter-long hose must be enough, and a little bit of extra material can be squeezed out. The other end of the breathing port needs to be held in the mouth, and it cannot do nothing and just let the frogman hold it in his mouth.

It's useless.

Isinglass is also used. Before solidification, a mold is carved out of wood. What does it look like? It's a bit like an English letter, a capital h. The horizontal line in the middle is the part where the hose passes through the shaped isinglass, and then the same is used

It is stuck with waterproof glue. In this way, the frogman bites the entire H-shaped fish maw in his mouth. The vertical bars at both ends of the letters do not actually look like small sticks. They only look like an H when viewed from the side.

Viewed from the front, it is a long and flat oval, a bit like a pacifier. The frogman's lips and teeth are gently held in the two concave parts above and below the h, so that it can be closed tightly without any effort and will not let the h.

The water seeps into the mouth. There are stoppers on both sides, so just put it in your mouth and you're done.

In this way, the frogman can breathe smoothly under the sea water as long as the depth does not exceed the length of the hose. After the bicycle inner tube is inflated, the buoyancy is very strong, and it can carry the other end of the hose and always remain on the water.

There are also some bamboo chips, paint, etc. to cover it up. Even if someone sees it in broad daylight, they will just think it is a piece of debris floating in the water. It is very common and no one will suspect it.

Is it simple? It's very simple. We can even make it at home. Naturally, it is impossible to live with Fan Keqin who has the resources of the entire Security Bureau.

Fins already existed in this era. They were made of rubber and looked almost the same as those of later generations. In this way, Fan Keqin tried a set and went into the water himself. After several rounds of experiments, he found that he could not move too fast.

Swimming, so that the floats on the water surface may be driven too fast and unnatural, there are almost no other problems.

So Fan Keqin made a total of fifty sets of diving equipment in one go. Anyway, these things were not valuable. After finishing, Fan Keqin took the things and went to a secretly blocked water area again, and handed everything to the frogmen.

Start training and use.

Fan Keqin sat on a gunboat, looking at the floating debris on the water, moving forward, looking at the watch from time to time, calculating the time. You must know that there is a person under every floating debris now.

Moreover, more than a dozen new mines were brought in from the navy's warehouse. However, the charging part of them was removed and they could not explode. The rest were no different from normal mines.

As time passed, human heads emerged from the water. Fan Keqin immediately asked: "How is it?"

Zhuang Xiaoman, who was in charge of timing next to him, said: "It took thirty-five minutes to dive one thousand meters underwater. This is the fastest result. The slowest was forty-seven minutes, but I still completed the one-thousand-meter dive."

Ma Chunliang, who is in charge of frogman training, said from the side: "Virgin, in actual circumstances, one trip is not one thousand meters, or even two thousand meters may not be enough. You know, if those ships

When entering the pier to dock, there is still a distance between the pier and the pier. The farthest one is more than three thousand meters even including all the distance back and forth."

Fan Keqin nodded and said: "I know, this is the first time to test the equipment. I will ask them later how they feel? If possible, increase the amount of training. The final criterion for everyone's qualification is to bring

To catch a mine, you must complete a three-kilometer dive within two and a half hours."

In fact, this standard set by Fan Keqin is not too strict, but it is definitely enough. You must know that in actual situation, the frogmen will only carry mines when they are "outbound". When they return, the mines have already been

Once installed, you don’t need to carry it around, it’s much easier.

So the actual situation is that only half of the journey requires carrying mines, but now he requires carrying mines directly throughout the whole journey, just to exercise their physical fitness, so that the frogmen have sufficient physical strength and are prepared. When actually performing the mission,

There will be no mistakes like running out of energy.

You know, in some later generations of special forces, the training for stealth was much more stringent than this. They could sneak up to 5,000 or even 10,000 people. And they had to do it two or three times a day. They also had to carry various weapons.

and heavy equipment. Fan Keqin's standards at this time were far worse than those of some special forces in later generations.

But everything must be done step by step, as the saying goes, haste makes waste. If you don't care and go straight to heavy training, you will only be exhausted and injured, and you will not achieve anything at all. Some members of the special forces in later generations are also the same.

Selected from the best of each army, their physical fitness and other qualities are extremely high.

However, although these frogmen under Fan Keqin have good water skills, they have just received professional targeted training. This process is really unrushed. Fortunately, Fan Keqin now has enough time to train properly.

It is said that Ma Chunliang is now a member of the Security Bureau, with a high military rank, and his position is a captain of the field team. But in fact, the official internal code name of this unit is Sea Lion.
Chapter completed!