It wasn't until a few meters away that the sea water gradually covered the top of the steel armor's head, and at the same time, the internal layer of the huge body of the steel armor was already filled with seawater.

If it is on land, the weight of this steel armor filling the sea is absolutely very amazing, but in the sea, there is no such concern, the streamlined shape of the steel armor can make it look like a flexible fish in the seawater.

"Start starting the underwater ion engine, and ask the owner to keep the posture of diving downward."

"Because the line of sight on the bottom of the sea has become lower, automatically turn on the chest searchlight, and start the sonar mode, the tunnel scan has been completed, the sonar map has been established, please pay attention to control the steel armor, do not hit the wall."

.....

After entering the water, the voice of the origin also sounded inside the steel armor.

At the same time, on the holographic projection inside the steel armor, the sonar scanning pattern of this tunnel has been revealed, and the three-dimensional map of the tunnel that has been built is displayed in front of Ye Fan's eyes through the holographic projection mode.

The speed of the steel armor has reached 40 knots, and it is still accelerating, and the ion engine at the foot of the steel armor releases a thirty-centimeter-long light blue beam, and also releases a large number of bubbles.

This is the result of plasma particles released by the ion engine, which collide with seawater, releasing a large number of bubbles and forming a white electrolyte around the ion engine, which will become thicker and thicker as the electrical energy is released.

"At present, the water depth has reached 800 meters, which has exceeded the cruising altitude of submarines of various countries." At this time, as the water level continued to decrease, the sound of origin also sounded inside the steel armor.

Generally speaking, submarines can rarely be lowered to a height of 800 meters underwater, and even if they reach this water depth by chance, they will not remain cruising at this water depth for a long time, because the water pressure at this time is already very terrifying, and the damage caused to the submarine is still very large.

Only the "Jiaolong", a scientific research submarine specially designed to resist the deep water pressure on the seabed, can dive to a depth of several thousand meters, but this cannot be used in military affairs at all, and it is completely impossible to carry torpedoes.

Moreover, this kind of submarine itself does not have any power source, and it is by relying on a rope to put the submarine down, and the movement of surface vessels, thus causing the movement of underwater submarines.

At this time, the water pressure has reached a very terrifying level, but thanks to the black technology exchanged by Ye Fan to resist water pressure, an electromagnetic water barrier layer can be formed on the surface of the steel battle armor, so as to reduce the water pressure to the greatest extent.

After a long tunnel ride through, we finally came to the end of the tunnel and to a new estuary, at the end of which a huge underwater base had been built.

Of course, the water depth has reached 1,400 meters, and even if the building is made of gold and titanium alloy, it will be directly flattened by the water pressure, because the water pressure here is too great to resist at all, even the electromagnetic water barrier.

Because the electromagnetic aquifer needs to consume a lot of energy, it can only work unless the mining spacecraft comes back and creates a new type of superconductor wire with zero resistance, which can be directly connected to the nuclear reactor on the surface.

Otherwise, because of the resistance limitation of the wires, the wires are not too long at all, and the nuclear reactor on the ground needs to be moved down directly, but it is obviously unrealistic for such a behemoth to be built in seawater.

This underwater base adopts the mode of irrigation, that is, seawater is poured into the interior and exterior to seek the balance of internal and external water pressure, and all intelligent robots working underwater are operating in seawater. Please net

This underwater base, with a length of 700 meters and a width of 100 meters, has 14 submarine harbors, but due to the all-out construction of the "Nantianmen" plan to float the city, 13 submarines have already started.

Each of these submarines is 80 meters long, 20 meters wide, and has a radius of 10 meters, making them a giant in the seabed.

This kind of submarine is a "submarine" in the true sense of the word, because it does not need to carry life, and there is no need to consider oxygen supply and the like, so the internal and external water pressure is the same.

The interior of the submarine was filled with seawater, and there were no weapons in it, and the purpose was to carry all the large pieces of steel to the South Pacific.

Because you don't need to think about water pressure, you only need to think about drag and the like, and each submarine is the size of a cigar.

In the belly of the submarine, there is a huge gate, and if it is opened, the steel carried inside the submarine will fall like a bomber bomb and fall all the way to the seabed.

"Master, please come with me to board the submarine, although the inside is full of seawater, but the speed of this submarine is much faster than your steel armor, master."

At this time, the voice of the origin also sounded inside the steel battle armor, and Ye Fan also nodded, through the information, it can be known that when the ion engine of this submarine is turned on at half power, the speed can reach more than 100 knots.

Of course, this speed is already the limit of the materials used to make submarines, and at this speed of 100 knots at a depth of 100 knots, the resistance is very terrifying, and if it is faster, it will disintegrate directly in the water.

Ye Fan followed the guidance of the sonar pattern and drove the steel battle armor all the way to the submarine.

The interior of the submarine is still very vast, and now the reason why the internal space of military submarines is narrow is because of the survival of the personnel inside the submarine.

If you want to dive deep, then the volume must not be too large, plus there needs to be air inside, so it must carry a very large water pressure.

Coupled with the life-sustaining system inside the ship, as well as the weapon system, as well as the power system, there is not much room for movement inside the military submarine.

However, the submarine built by the Origin is completely a large round iron frame, with several plum engines installed in the tail for propulsion, and its interior is basically reduced and reduced, and there is no need for any life support system or the like.

Inside the submarine, 30 intelligent robots have been carried, all of which will be sent to the South Pacific to build an undersea city.

On the return trip, these submarines will also pull the energy-exhausted robots back to replace the batteries, and then pull the robots over after changing the batteries, which has greatly improved the efficiency.

"Hum...."

In the seawater, the sound of the ion engine starting is very strange, like the sound of a train starting, but it is an intermittent sound, not continuous.