The seaplane stayed on the sea about 300 meters away from the waterway at the southern end of the Maugue Islands Lagoon. George placed the C4 and took more than 20 minutes to surface. Then Yang Jing and the other three took two motorboats to the seaplane.

Here, George, who had changed out of his diving suit, pressed the detonation button himself, and the next moment...

Nothing happened...

At a depth of fifty meters underwater, only the explosion of a deep-water bomb can be felt by people on the surface of the water. When C4 of this equivalent is detonated, people on the surface of 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 making sure that the volcano was fine, they returned to the lagoon. Yang Jing put on a compressed air bottle and mask, put on fins, and dived directly.

At this depth, only he could quickly ascend and descend. Even if Chris and his companions were elites, they could not survive. In order not to waste time, Yang Jing had to once again act as the workhorse and go into battle himself.

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

Similar to what Yang Jing guessed, the entrance to this secret base is one or two steel doors. However, in order to conceal the existence of the entrance, a layer of rock about one meter thick is attached to the outside of the door. However, because the door moves horizontally or up and down when it is opened and closed, this layer of attached rock also needs to be retracted into the surrounding rock layer along with the door, so this rock wall is as flat as a tussock.

Now the rock wall used to cover the lower left corner of the gate has been completely blown open, and the steel gate inside was immediately exposed.

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

Such a heavy door is most likely made of special steel, which is why it has not been completely corroded by sea water after being soaked in sea water for more than 70 years.

Although Yang Jing is the best at dealing with this kind of door, with the storage space, there is no door in the world that can stump Yang Jing, but Yang Jing cannot do so because he has several bodyguards behind him.

The door opened by the storage space is absolutely different. Anyone who sees that kind of mark will know that there is a huge trick in it. Yang Jing does not want to expose the secret of the space, so he can only use the most primitive method to break this piece of steel plate.

After Yang Jing surfaced and reported the situation, several bodyguards began to discuss how to break open the door which was at least ten centimeters thick.

Yang Jing was a complete layman when it came to this kind of thing. He could only provide information about the door. As for how to break it open, he could only listen to Chris and the others discussing it.

John Bruno said, "Let's use an oxygen-hydrogen cutting torch. This method uses combustible gas with the best steam-oxygen pressure, and the flame is easy to maintain. The equipment is lightweight, and the underwater cutting depth can reach about 100 meters. This time we need to cut to a depth of only more than 50 meters, so we can use this method to break open the door, and we also brought this equipment this time."

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

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

John shook his head and said, "I don't think it would be possible to cut such a thick special steel plate even with an arc-oxygen/steel pipe cutting strip."

Several people nodded silently. George Bruce on the side 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 several people heard this, they all looked at George. None of them could think of a solution, but this guy actually had two solutions.

George shrugged and said, "In fact, it is not that difficult to break the steel plate of this steel door. I wonder if you have heard of underwater shaped charge explosion? This method uses the power of directional explosives to directly blow up the steel plate. This method can be used to cut pipes, cable I-beams, cut holes, special steel, etc. The cutting thickness can exceed 100 mm. However, this method is relatively violent and is likely to 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 this base will be out of use. It doesn't matter if it's blown up. But do we have such ready-made equipment now?"

George spread his hands and shook his head. "Boss, we don't have this kind of equipment. But 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 open."

Yang Jing shook his head slightly without saying anything. Chris said, "George, don't you have two solutions? What's the other solution?"

"That method is more violent than this one. It uses special thermite to forcibly melt the steel plate."

My dear, there is more to this chapter. Please click on the next page to continue reading. It’s even more exciting later!