The seaplane stayed on the sea about 300 meters away from the southern end of the Mauge Islands Lagoon. George placed the C4 and took more than twenty minutes to float to the sea. Yang Jing and the other four took two motorboats to the seaplane.

Here, George, who had changed his diving suit, personally pressed the detonation button, the next moment...

Nothing happened...

The depth of fifty meters underwater is not the kind of deep water that explodes, which will make people on the water feel it. This small-equivalent C4 is detonated, and people on the water cannot feel any vibration or sound at all.

Yang Jing and his group waited on the water for more than half an hour. After confirming that the volcano was not at all, they returned to the lagoon again. Yang Jing put on a compressed air bottle and a mask, put on his flippers, and dived directly.

Only he can quickly float and dive in this depth, and Chris and the others are not good at being elites. In order not to waste time, Yang Jing had to act as an old ox again and put on the battlefield in person.

A hole with a diameter of about two meters had appeared at the underwater blasting location. The rock layer of about one meter thick was peeled off by C4, revealing the steel plate inside.

It is similar to what Yang Jing guessed that the entrance to this secret base is one or two steel doors, but in order to conceal the existence of the entrance, there is a layer of rock about one meter thick hanging outside the door. It is just that because the door is opened and closed horizontally or up and down, the attached rock also needs to be retracted into the surrounding rock layer along with the door, so this rock wall is so flat.

Now the rock wall used for concealment in the lower left corner of the gate has been completely exploded, and the steel gate inside is immediately exposed.

Yang Jing took out a hammer and knocked on the exposed steel plate of the door. Judging from the sound made, the thickness of the door was more than ten centimeters.

Such a thick door, and it is very likely that it is made of special steel, can be soaked in the sea water for more than 70 years and still not completely corroded by the sea water.

Although Yang Jing is the best at dealing with such a gate, and with storage space, there is no gate in the world that can stump Yang Jing, but Yang Jing cannot do this. There are still a few bodyguards behind him.

The door opened with storage space is absolutely unique. Anyone who sees that trace can know that there is a huge trick here. Yang Jing does not want to expose the secret of the space, so he can only use the most primitive method to break the steel plate.

After Yang Jing floated up, he told the situation. Several bodyguards began to discuss how to break the door, which was at least ten centimeters thick.

Yang Jing is a completely outdated person for such things. He can only provide the situation of this door. As for how to break the door, he can only listen to Chris and the others discussing there.

John Bruno said: "It's better to use an oxygen-hydrogen cutting gun to cut. This method has the best oxygen vapor pressure combustible gas, the flame is easy to maintain, and the equipment is light, and the underwater cutting depth can be as deep as about 100 meters. This time we need to cut the depth is only more than 50 meters. We can completely break the door in this way, and we also brought this equipment this time."

Chris shook his head and said, "John, although your method is good, the cutting speed of this method is too slow."

Kevin Martin also said: "Yes, we can't stay underwater for too long. We need to break this door as soon as possible. The most important thing is that this oxygen-hydrogen cutting method is OK to deal with ordinary ferrite materials, but it seems a bit too little to see for this special steel door. And don't forget that the boss said just now that the thickness of this door is at least 100 mm, and the oxygen-hydrogen cutting method cannot deal with such a thick special steel plate."

John shook his head and said, "I think even if it is cut with arc-oxygen/steel pipe cutting strips, I'm afraid it won't be cut."

Several people nodded silently, and George Bruce, who was beside him, looked at everyone with a smile, and then said to Yang Jing: "BOSS, I have two ways to break the steel plate of this steel door."

When the few people heard this, they all looked at George. They didn't think of a single solution. This guy actually had a solution, and he said it was two.

George shrugged his shoulders and said, "In fact, it is not so difficult to break the steel plate of this steel door. I wonder if you have heard of the underwater molding and charging explosion method? To put it bluntly, this method is to directly explode the steel plate by using the power of directional medicine. This method can cut pipes, cable I-steel, cutting holes, special steel, etc., and the cutting thickness can exceed 100 mm. However, this method is more violent and can easily cause damage to components near the cutting point."

Yang Jin nodded thoughtfully and said, "It doesn't matter if the nearby components are destroyed. Anyway, the Japanese don't know how long it will take to open this base, and it will explode if it explodes. But do we have such ready-made equipment now?"

George shook his head with his hands spread out, "BOSS, we don't have this kind of equipment. However, this kind of equipment is very simple and can be easily purchased on the market. At worst, we can fly back to Saipan to buy it and then break it."

Yang Jing shook his head slightly without saying a word. Chris said: "George, didn't you say there are two ways? What is the other way?"

"That method is more violent than this method, and it is to use characteristic aluminum thermal agent to forcibly melt the steel plate."

When everyone heard this, they couldn't help but breathe a sigh of relief. They were all retired soldiers and naturally knew the power of this aluminum heater.

The aluminum thermal agent is a mixture of aluminum powder and refractory metal oxides. When used, it is ignited with an ignition agent. The reaction is vigorously carried out to obtain aluminum oxide and elemental iron and release a large amount of heat. The temperature can reach a terrifying 2500 degrees Celsius, and almost melt most of the metal or alloy steel.

In theory, it is most suitable to use aluminum thermal agent to melt this special steel plate, but if aluminum thermal agent is used in water, the high heat generated will cause water to decompose into oxygen and hydrogen. Once these two products are mixed and ignited, it will cause an explosion.

Chris told this concern, but George smiled and shook his head and said, "This is not a problem. I have several aluminum thermal agent formulas that can be cut underwater. As long as you are careful, it will not cause an explosion."

After a pause, he continued: "In fact, since the invention of aluminum thermal agent, various aluminum thermal agent formulas have come out accordingly to deal with different welding or cutting environments. This underwater aluminum thermal agent cutting method has appeared more than 30 years ago. It is now very mature, so you don't have to worry. The most important thing is that using this method to break the steel plate is the fastest."

Yang Jing nodded, "George, if you are sure, then use this cutting method. On the premise of ensuring safety, use this method to break the damn steel plate!"
Chapter completed!