Bright Sword starts with the grenade flat.

Chapter 155 Frogman Equipment

Precisely because of the ultra-high combat cost-effectiveness of the Frogman Special Forces, as for what combat cost-effectiveness is, it is actually very simple. For example, an RPG worth one thousand meters can kill a third-generation tank worth ten million meters, then this is Ten thousand times more cost-effective.

And using a cruise missile worth millions to blow up a transport vehicle worth 100,000 yuan, who would do it with such cost-effectiveness? After all, in the end, the war is all about money.

Of course, except for some extremely rich tycoons, after all, people are rich, but what can you do if they have too much money and no place to spend it!

Therefore, after World War II, the navies of many countries began to pay attention to frogman surprise attack tactics and formed "frogman" units one after another. The particularity of this underwater armed force is reflected in its daily training and combat skills.

The frogman can penetrate only three or four meters away from the enemy ship when it is parked to conduct reconnaissance. If necessary, they can continue to get closer and detonate adsorbent mines below the waterline of the enemy ship, which is enough to blast through the hull of the ship.

Even if someone on an enemy ship spots a frogman and sounds the alarm, the frogman will not give up the mission easily. In order to prevent the enemy ship from sending divers to dismantle the mines, the frogmen are always ready to detonate the mines in advance, even if they are too late to evacuate.

There is no way to exchange a human life for a ship worth hundreds or even hundreds of millions of dollars. It is really a good deal, just like the kamikaze team of the little devil ramming a plane into an aircraft carrier.

In addition to being good at sneak attacks on enemy ships, the Frogman Special Forces also have the ability to seize islands. They can lurk on the seabed about fifty meters deep around islands and reefs for long periods of time.

And in order to cultivate the frogmen's sense of direction like that of pilots, the instructors tied them to rotating wheels, and then asked them to distinguish between southeast, northwest, up, down, left, and right. When night falls, the frogmen surface and practice landing on the island. An excellent sense of direction allows them to move toward their goals in the dark.

It is said that in order to enhance their hiding ability, frogmen have to participate in special training programs: they are buried in a hot sand pit in the scorching sun, with only their nose exposed to breathe - this is to strengthen the frogman's concealment ability after landing on the island.

In daily training, modern frogmen also practice avoiding enemy anti-frogman electronic detectors. For example, in order to avoid being detected by infrared detection, they will coat their bodies with mud to reduce their infrared signature.

So what equipment can allow frogmen to sneak underwater at high speed freely? In response, the Chinese frogman force developed and equipped the highly innovative UJP underwater power combat suit. It allows the frogman to transform into the hero in the comics - "Aquaman" who can swim underwater at high speeds, even faster than sharks.

After World War II, the development of Germany's armed forces was restricted, and there was no frogman team in the navy. It wasn't until 2003 that the German Navy officially formed a frogman unit out of necessity.

Among all modern frogmen, those of Deguo have the best and most advanced equipment.

When frogmen move underwater, they often have to take mini-submarines and frogman transport vehicles.

As an emerging underwater combat force, this force follows the development principle of technology first and has developed and equipped many leading high-tech frogman equipment.

The core device of UJP is the speed-controlled underwater thrusters placed on the frogman's arms and legs. Due to the use of a miniature electric engine, this propeller can generate powerful thrust underwater, allowing the wearer to swim at high speeds, with its fastest speed comparable to that of a seal.

Another feature of UJP is that it allows the wearer to change the direction of sneaking at will - a frogman wearing UJP can quickly change direction by moving his arms and legs slightly, and sneak like a fish flexibly and freely underwater. Of course, frogmen must undergo rigorous training before using UJP.

UJP is powered by electricity and has a built-in lithium battery. A remote control that controls the thruster speed is held in the wearer's hand. He can speed up or slow down the thrusters simply by pressing buttons on a remote control - which transmits instructions to the thrusters via wired electrical signals. It is worth mentioning that because the UJP combat suit is powered by electricity, it produces very little foam during operation, which ensures that enemies on the sea will not discover the frogmen using the UJP. Of course, to put it bluntly, this UJP is actually just an underwater electric pusher tied to the body.

There were a lot of these kinds of gadgets on the e-commerce platforms before Liu Xiu traveled through time. After all, these gadgets looked very high-end, but they were just that. A large-capacity lithium battery, plus a motor and a controller were enough. Well, at most it requires better waterproofing.

Precisely because there is no technical content, you can buy one on some e-commerce platforms for a few hundred or even thousands.

Of course, there are some that cost tens of dollars, but I can’t guarantee whether they can be used underwater.

However, what looked like a low-tech gadget before Liu Xiu's time travel was considered a high-tech gadget during the Anti-Japanese War. First of all, this lithium battery was a big problem. After all, lithium batteries had not been manufactured yet during this period!

Of course, the high-end version can't do it, and the low-end version can't be tried. For example, you can use lead-acid batteries to make do!

Although lead-acid batteries cannot be manufactured in the Eighth Route Army's arsenal now, the little devil's cars and even motorcycles do have lead-acid batteries and starter motors that are responsible for starting the engine!

However, this controller is a problem, and of course it can be solved. If the high-end version of the thyristor controller cannot be used, then use a variable resistor instead. After all, variable resistors are very easy to make.

The simplest variable resistor is to wind a coil with a conductor such as iron wire or copper wire, and then add a moving slider to the coil.

The final insulation is not impossible. After all, wood paint is a good insulating material, and the voltage of lead-acid batteries is only about that. Such a low-profile version of the underwater electric pusher is completed.

Of course, since the energy density of lead-acid batteries is incomparable to that of lithium batteries, with a gap of four to five times, the electric cruising range of lead-acid batteries is naturally four to five times different.

Of course, the frogman's underwater mobile device can be solved, but the underwater combat weapons of the frogman special team must also be solved.

After all, although the gun can be fired underwater, because the resistance of water is 800 times that of air, the speed of normal bullets will be greatly reduced immediately after entering the water. For example, the famous AK bullet will only be fired after entering the water for one meter. Can leave a mark on the board.

This is also the reason why in many movies, the protagonist dives into the water, and no matter how many bullets the villains shoot into the water, the protagonist can still emerge without any trouble after a while and taunt the enemies on the shore.

However, because of this, in order to allow frogmen to have good combat effectiveness underwater and prevent them from fighting the enemy empty-handed underwater, various countries in the late World War II developed firearms that can fight underwater.

And Liu Xiu naturally understood the principle of underwater firearms being able to shoot underwater and had seen what underwater firearms looked like, so naturally there was no need to worry about the problem of frogmen having no weapons underwater.

(End of this chapter)