After Zhuang Xiaoman left, Fan Keqin roughly recalled his thoughts and began to study the plan again. After a while, Zhuang Xiaoman once again handed over a piece of information sent by Kong Xinran, the first secretary of the Intelligence Department, to Fan Keqin.
This is the intelligence sent back by the military commander in several coastal port cities. So far, no trace of the small Japanese warship has been found. Of course, this is not surprising, because the Japanese warship has already sailed away from the Xiamen pier after the replenishment was completed. According to the calculation of distance and course, it is now in the "three no-relief" zone offshore. Therefore, the military command and security bureau set up along the coast Naturally, these warships cannot be seen from the "observation point". This is a routine report, and if nothing is found, it doesn't mean anything.
Fan Keqin put away the several drawings he had researched and drawn, and gave the required materials to Zhuang Xiaoman again, asking him to send them to the Procurement Section of the General Affairs Office. Let them buy a few more sets.
In this way, Fan Keqin began to prepare this plan. Time flies very quickly when people are busy, so a week goes by in the blink of an eye. Almost everything that needs to be prepared has been prepared.
After repeated experiments with the magnetic mines that Jiang Bin and Du Shengli were in charge of, the charge quantity was changed from occupying four water injection chambers in addition to the original charge part to five. In this way, the depth-fixing device that returns to the zero position remains stationary once it enters the water. It is directly two meters below the water surface. At this time, you only need to adjust the depth-fixing device by one step, and the mine will remain snorkeling at a position of three meters below the water surface.
The increase in charge means an increase in power. All have two detonation systems, which can be said to be double insurance. As long as one of the systems is functioning, the mine is bound to explode.
The same goes for the timing devices, all of which come in two sets. Moreover, Jiang Bin and Du Shengli also came up with a very good way to prevent the timer from leaking. That is to use a thick layer of wax on the timer, and then use the grease after burning the linoleum paper to seal all the gaps. The location is instilled again.
With two layers of waterproofing, the timers used for experiments have been lying in the water for three days and are still functioning normally.
The training of frogmen was quite difficult at the beginning. In fact, armed swimming also existed in this era. But it's basically just a name. Very few troops train like this. The main reason is that after high-intensity training, the soldiers' appetite increases greatly and they need nutrition. Which warlord is willing to eat and drink freely?
It's pretty good if it can give you something to eat and not go hungry. In this case, Chiang Kai-shek's Central Army may be better, but it is only reflected in the fact that the equipment is better than other local armies, and the food and drink... I can only say that it is just okay. But engaging in heavy training is tantamount to wishful thinking.
Fortunately, the twelve frogmen selected by Fan Keqin had grown up by the river or the sea. Isn't there a saying that goes well? Those who drown are those who know how to swim.
These dozen brothers have not drowned yet, which shows that the water quality is indeed good. However, these people have since entered the workplace, and naturally they cannot swim like they did when they were children. They do not have the conditions to take a bath in a bathhouse, which is as good as the sky.
But swimming is one of those things that once you learn it, you will never forget it. Twelve frogmen have regained their senses after training for a day in a water area designated by Fan Keqin to be blocked. There were three boys with the best water skills. One of them even jumped down and his head popped up on the other side of the river.
Seeing Fan Keqin in his eyes, I feel that these people have good water skills, although the breath holding time is definitely not as good as mine. But relying solely on human talent is never enough. This is mainly because the situation in sea water is inevitably different from that in river water.
In addition, the dock for large ships even extends several hundred meters from the shore. And you can't really dive hundreds of meters vertically from the pier controlled by the Japanese or the puppet government. You have to dive from a place that is the least defended, or even very far away. He remembered the world record of later generations, in which a person could dive and swim hundreds of meters back and forth without any breathing equipment.
But this is conditional. First, the person is in a calm swimming pool. Second, this person needs to breathe oxygen for a long time before officially starting, so that the oxygen content in his blood can be maintained at the highest level. Third, this person has been training in this area all year round.
Fan Keqin does not think that his frogmen are better than the world record holders decades later. After a series of the most scientific preparations and a lot of training, people can only swim a few hundred meters in a calm swimming pool. Still can't meet my own requirements. For this reason, Fan Keqin specially made a set of diving equipment himself.
The reason why people are human is because they make a lot of equipment and use equipment. Don't say that people have to rely on themselves. In fact, equipment is also made by humans. There is really no shame in using equipment made by humans.
For example, someone has been practicing martial arts for ten years, and another spent a year making a homemade gun at home. After the two people met, this person shot the martial arts practitioner away. You must not say that the other person was opportunistic and used foreign objects. The other side wins.
Losers are losers, don't make any excuses. If you are a true hero, you have to learn a lesson. This time you know the power of firearms. Then you also start to learn this knowledge and strive to build better guns with stronger range and strive to surpass the opponent. This is the real thing. What a hero does.
So using all kinds of gear, it’s really normal. Never be superstitious about the human body's ability to fight against superweapons invented and created. Otherwise you will really die miserably.
The thing Fan Keqin asked Zhuang Xiaoman to give to the purchasing department a few days ago was an underwater breathing device designed by himself.
In fact, in this day and age, there are already things like diving suits. The kind that can work underwater for a relatively long time, but it is too bulky, a bit like a space suit, with a thick breathing tube connected to the inside, like a canned super armor.
Fan Keqin couldn't let his frogmen use this thing. First, it was too bulky. The actual situation is that the frogman needs to be underwater and sneak for at least a few hundred meters, or even thousands of meters. As a result, canned diving suits consume too much physical energy. The second is that it is not flexible enough. They also need to move with mines underwater, and also need to set up timing devices, etc. The can-type diving suit cannot be operated at all. The third thing is, if the moving distance is too far, how long does the breathing tube need to be? The longer it is, the heavier it is.
