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 very few things needed, a bicycle inner tube, a thin piece of bamboo, a five-meter-long hose, and isinglass. Basically, we are all alive.
From the 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 section of inner tube to put them on and stick them tightly. It looks like a circle 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 pipes used for hanging needles in this era, but it is thicker. If it is too thin, the oxygen you breathe will not be enough.
A hose that is over five meters long is definitely enough, and there is still a little bit left over. The other end of the breathing port that needs to be held in the mouth cannot be left alone and just let the frogman hold it in his mouth. That is useless.
Isinglass is also used, but before it solidifies, a mold is carved out of wood. What does it look like? It's a bit like the English alphabet, capital H. The horizontal line in the middle is the part where the hose passes through the shaped isinglass, and it must also be glued 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. This only looks like an H when viewed from the side.
Viewed from the front, it is an elongated oval, somewhat like a pacifier. The frogman's lips and teeth gently hold the two concave parts above and below H, so that they can be closed tightly without much effort and will not let water seep into the mouth. There are head stops 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. The buoyancy of a bicycle inner tube is very strong after it is inflated. It can carry the other end of the hose and always remain on the water.
There are also some bamboo chips, paint and other coverings. Even if someone saw it in broad daylight, they would just think it was a piece of debris floating in the water. It's so common that no one would suspect it.
Simple? It's very simple, we can even make it at home. Naturally, it is impossible to live in 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 did a set of experiments and went into the water himself. After a few rounds of experiments, he found that he could not swim too fast. As a result, the floats on the water surface may be driven too fast, which is unnatural. , there are almost no other problems.
So Fan Keqin made a full fifty sets of diving equipment in one go. It's not worth anything anyway. After finishing it, Fan Keqin took the things and went to the secretly blocked water area again, and handed all the things to the frogmen to start training.
Fan Keqin sat on a gunboat, looking at the debris floating on the water, moving forward, looking at the watch from time to time, and calculating the time. You know, there is a person under every piece of floating debris now, and more than a dozen new mines have been brought in from the Navy warehouse. It's just that the explosive part has been removed and cannot explode. The rest is no different from a normal mine.
As time passed, human heads appeared gently on 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 you enter 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 journey 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 know, in reality, frogmen will only carry mines when they are "going out". On the return trip, the mines have already been installed, so there is no need to bring them with you, so it will be much easier.
Therefore, the actual situation is that only half of the journey requires carrying mines, but now he requires carrying mines directly throughout the entire journey, just to exercise their physical fitness and allow the frogmen to have sufficient physical strength and be prepared. When actually performing a task, there will be no such mistake as physical exhaustion.
You know, in some special forces in later generations, the training of stealth is much more stringent than this. It is easy to sneak up to 5,000 or even 10,000 people. And I have to do it two or three times a day. They also carry various weapons and heavy equipment. Fan Keqin's standard at this time was far worse than that 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 become exhausted and injured, and there will be no results at all. Some members of the special forces in later generations were also selected from the top ranks of each army, and their physical fitness and other qualities were 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.
Fan Keqin said: "Brothers must not have trained like this before, so they must keep up with nutrition. At least two meals of meat a day, and three cans of American meat every day..."
