The Chinese food was sumptuous, and there were plenty of fresh tropical fruits, but before the meal was finished, new news came from the "Big Shark".

In the early stage, the pathfinders searched this area of the sea, not because they got the news of the wrecks in the shallow water, but for the steel wreck at a depth of 50 meters: there were small trawlers who were unlucky over there, and they were picked up from the rusted steel structure.

There are shipwrecks, but the local fishermen are not interested: the water depth of nearly 50 meters is not something that ordinary fishermen can afford to fish, even if they bring diving and exhalation equipment!

Diving well, the depth of 18 meters is the first hurdle, 30 meters is the second big difficulty, unless there are advanced safeguards and equipment, the absolute depth of recreational diving 40 meters for ordinary divers, that is the line of life and death!

Besides, within the thousands of square nautical miles nearby, there were many steel warships and cargo ships sunk during World War II, and the nearby fishermen were not surprised and did not take it seriously.

The water was too deep, and the fishermen did not dare to go down, and they were not interested in going down, but the guys who were exploring the way did not give up, and went to this vicinity to inquire and search again, and found five sunken ships in a short time.

When the "Big Shark" arrived, it was used to go down with a small underwater unmanned submarine to see it, and it was preliminarily determined that it was a cargo ship, which led to today's fixed-point dive.

Because they had previously used unmanned mini-submarines to probe the divers, two of the divers were not wearing the kind of diving suits with compressed air cylinders on their backs, but heavy work diving suits connected to the snorkel and communication cable, otherwise the news would not have been transmitted back so quickly.

At a depth of nearly 50 meters, the dive can be fast, as long as you can afford it, you can reach the seabed in two minutes.

But below, except for the zero-pressure rigid wetsuit, no matter what kind of wetsuit you wear, the working time is up to 50 minutes, which is still the time that the best professional divers can achieve, and the average level of professional divers has to float in half an hour.

When the time comes, you must come up, and you can't rush up all at once, otherwise the joints of your limbs will be sore, and you will die!

The 50-metre ascent, which takes about 40 or 50 minutes, is divided into several sections.

You can dive twice a day, but the time of launching must be more than 6 hours away from the time of the previous time, otherwise it is easy to get "diver's disease", and the working time on the bottom of the sea after the second dive on the same day must be strictly controlled, and it must be more than a quarter less than the first time.

As for the first dive of the next day, this time of launching will be more than 12 hours different from the second time of the previous day, so there is no negotiability!

This is science, an iron rule carved with countless experiments and divers' lives, and if you don't want to die or be disabled, you must abide by it!

This time, the situation on the bottom of the sea was transmitted by the divers through the intercom in the big helmet, and the ascent time was too long: from today, they will have to follow the biological clock according to the needs of the dive, and there will be no time for lunch or lunch.

"The wreck below is about 130 to 140 meters long, with a tonnage of six or seven thousand to 10,000 tons, and it should have been sunk by torpedoes.

When the ship sank, it lay on its side, probably after a roll, and two large holes about 30 meters apart were exposed on the bottom side of the port side to reach the cargo hold.

Divers found a number of black-brown surface metal oxide ingots on the seabed near the wreck, and even more in the hold.

Very heavy, each piece is not large, but at least 30 kilograms, which will be in the process of preliminary salvage. ”

Well, after listening to this report, I will leave the ship and go to the "Big Shark".

"What could it be?"

This is the thinking of a bunch of people: if it oxidizes, it is not gold, but silver?

After soaking in the sea water for a long time, this silver will also look like a black-brown ugly one.

The amount of silver transported by cargo ships will not be small, right?

It didn't take long for the yacht to get on the cargo ship, and as soon as the group climbed up, they just happened to meet the first basket of metal pieces out of the water.

Unlike the removable miniature cranes on the Sunshine Star, the smallest cranes on cargo ships can lift tons of heavy gondolas.

This basket is also a big guy welded with steel bars, and there are more than ten pieces of metal in it, about half a ton!

Before he could open the lid of the hanging basket, Zhang Nan said, "It's not silver." ”

A woman on the side of her, when she heard this very positive judgment, looked at him with a "how do you know" expression.

Chinese and English together, "I used to be a purchaser in the Materials Bureau, do you know the Materials Bureau?...

Forget it, you don't understand, I used to deal with all kinds of metals, this is a mold pouring method for non-ferrous metals, the two ends of the rectangle protrude for a while, and the storage is not wrong.

If each piece weighs about 37 kilograms, it is a tin ingot. ”

As he spoke, he stepped forward and watched as the sailor took a piece out of it with a little effort and put it on the deck.

With a hand stretched, "Knife." ”

Without the need for bodyguards, the sailors on the deck handed over a diving knife with a blade length of about 15 cm.

Then he took it with his thumb and made a sharp cut: he held the handle of engineering plastic, cut along one of the corners of the metal ingot, and a silver-white corner appeared.

He handed the knife back to the sailor, picked up a small piece of metal cut from the deck, and looked at it.

"Can't be wrong, it's pure tin, the purity is estimated to be more than 9 into 9, and it almost doesn't contain lead. ”

This tone is bursting with self-confidence!

Although the two quilts add up to this buyer for five or six years, this professional quality is not blown: the purity of tin is high, the price difference is big, not that you say pure tin is pure tin!

Confident men are attractive, and this is true in the eyes of women. However, this tin ingot is a common industrial raw material that Dixiter and Sawaguchi Yasuko have heard of, and they still feel a little pity: if only silver would be good, then it would be rich!

Zhang Nan was in a good mood and asked Jamie Bostwick, the captain of the "Big Shark": "How many are down there?"

Jamie, who is in his forties, smiled and said, "There are a lot of them scattered on the seabed, and if you explore again, there will be a lot of them under the sea sand, at least dozens of tons."

It's hard to say in the hold, at least hundreds or thousands of tons are there, it's just that it takes a lot of effort to get it out, but it's worth it, you can make a lot of money!"

The sailors and divers present were in a very good mood after the boss judged that it was a pure tin ingot. Compared with those ancient sea-fishing porcelain, the cargo shipwrecks that transport non-ferrous metals and strategic materials are really good things!

At this time, Dixhit and Yasuko Sawaguchi realized that they couldn't underestimate the tin ingots in front of them, and the Indian beauty asked in a low voice: "It's worth a lot?"

When Zhang Nan heard this, he said with a smile: "Of course it's valuable, it was even more valuable ten years ago, when a ton was more than 18,000 US dollars, and now even if it has fallen sharply, it can maintain between 8,000 and 8,800 US dollars per ton."

I guess at least a few hundred tons, or even a few thousand tons, and it's a lot of money!"

For the cost of seabed salvage, this time it is really profitable: the absolute value of this money cannot be measured by Zhang Nan's value, but from the output ratio of the salvage company.