"Captain, the full speed has been mentioned, the current speed is 26 knots, the heading is 255, and it is 15 nautical miles from Ranfang Island. ”

Half an hour after the ship sailed out of the port, Gu Kun took his sister into the wheelhouse to inspect the situation, and Chen Li reported to him truthfully.

A survey ship is a survey ship, much faster than a fishing boat. Gu Kun's fishing boats, no matter how they soar, they won't be able to soar to 20 knots.

The fishing boats use diesel engines, and this survey ship uses gas turbines, and the difference in power types is there, and there is no way.

Gu Kun looked around the environment and was expressionless: "Speed up again, try the real speed of this ship." ”

Chen Li was a little worried: "No matter how hard you try, it will only be 28 knots or 29 knots at most, and this boat will definitely not be able to drive 30 knots...... What if the maximum pressure continues and the ship is damaged?"

Gu Kun was very confident: "Don't worry, if you can't see it after two hours, the damage is mine." ”

Chen Li didn't say anything more and did as ordered.

The boat began to pick up speed again and was expected to be able to add to 28 knots in 10 minutes.

Gu Pan followed to study, and when he was far away, he asked his brother alone: "Is this necessary?"

Gu Kun subconsciously looked left and right before replying: "It is necessary, if we encounter the Indonesian fishery boat, we had better use the running one and negotiate less." If you can open two or three quarters faster, you will have a little more chips and be prepared. ”

In just a few words, Gu Pan felt that the atmosphere became tense.

Fishing in other countries' exclusive economic zones is, after all, a relatively difficult matter to elaborate, and you can avoid it if you can.

After sailing for another three hours, Gu Kun reconfirmed his positioning, and the ship had reached the ocean 90 nautical miles away from the Lanfang Islands, 60 nautical miles from the Tammelan Islands in Indonesia, and 70 nautical miles from the Shan Pass Ocean Port in Indonesia.

Legally, the territorial waters of all countries are 12 nautical miles wide, so this is not the territorial waters of any country. However, if the exclusive economic zone is zoned, it is closer to Indonesia by 20 nautical miles, so there should be no objection.

"Slow down the boat and release towed active sonar for precise positioning. Gu Kun was in the captain's room and gave an order through the walkie-talkie.

Even if the coordinates were accurately remembered in the previous life, but for such a thing as fishing boats, the sea is vast, and it is necessary to relocate it when it comes to the specific location.

According to international practice, many of the work of fishing for ships in foreign exclusive economic zones must be filed with the host country. The filing accuracy requirement is generally a square area with a side length of 3 nautical miles. In other words, the first discoverer can request the exclusive protection of the salvage rights of the nine-square-nautical mile sea area after obtaining permission, and the time period is generally not more than half a year.

The information that Gu Kun remembered in his previous life was also from the records of Indonesians. At this moment, the ship at the bottom of the sea should have been fished by the Brittany thief Michel Hatcher in 1999.

According to the data, it was a medium-sized merchant ship that the Spanish sailed from the port of Jiading to Jakarta in the 18th century, when the Dutch East India Company already controlled most of the southern shipping routes of the Spice Islands and had a relatively strong penetration in the South China Sea. Therefore, when the ships operated by the Spaniards were forced to return to Europe from the Philippines, they had to take a detour and go south along the coast of Vietnam, because the Dutch had a relatively weak power in the coastal waters of Vietnam.

(Note: "Gia Dinh Port" is the name of a port in southern Vietnam in ancient times, roughly equivalent to the later Saigon, and has nothing to do with the Jiading in China.) Those who have played the Age of Discovery should know that Southeast Asia has this port)

Because of the accuracy recorded on the source, there is an error of three nautical miles. Therefore, when Gu Kun arrived at the scene, he had to use high-precision sonar to accurately define which hundred meters the ship was located in the three nautical miles.

......

After dozens of minutes of repeated listening and investigation, Gu Kun finally confirmed the specific location.

In the captain's room, he calmly ordered through the walkie-talkie: "Go south-southwest for three and a half chains, and anchor two chains in advance." ”

"Roger, right-hand drive 215, idling forward. Chen Li replied in the wheelhouse.

"Roger, ready to anchor. "Ryugo also confirmed the anchor operation command.

The "one chain" was originally a unit of distance at sea, equal to one-tenth of a nautical mile, that is, 185 meters, or 0.1 minutes of equatorial latitude.

(Note: One nautical mile is 1852 meters, many people think that this number has zero and round, and think that it is an imperial unit and excludes the use of it, but in fact it is not.) The nautical mile is an international unit, which originally meant "the distance of 1 minute latitude above the equator", that is, the circumference of the earth is 40,000 kilometers, divided by 360 degrees, and then divided by 60 minutes per degree. If you are interested, you can click on the calculator and calculate it to be 1852 meters)

However, with the evolution of navigation technology, many ships have designed the length of their anchor chain as a whole chain unit, which helps to control the final accurate docking position after anchoring in advance.

The principle of the anchor is that if you hinge from directly above the anchor, you can easily lift the anchor, and if you drag it out horizontally for a long time, the anchor will hook the seabed and drag the ship to death. In order to retract the anchor, the ship has to be driven back directly above the original anchor point.

Figuratively speaking, it is like a farmer's plough that is plunged into the soil, and you pull it horizontally with great difficulty, and you can't move when the plow reaches a big rock. But if you lift the plough up, you can easily lift it.

At this time, Gu Kun used the method of accurately calculating the length of the anchor chain in advance to control the exact position where his ship finally stopped, just above the sunken ship, which was very clean.

After arriving at the point, Gu Kun put on his diving equipment with a light car: "Long Wu, can you do it?" It is estimated that it is more than 100 meters here, you can dive down with me to reconnoitre." It may be necessary to install a demolitionist, which I can't operate alone. ”

"No problem, boss, look at me. Long Wu quickly agreed, and then went into the water.

This time, Gu Kun came prepared to catch merchant ships, so he would definitely not be satisfied with fishing for things in boxes. He had made a plan to salvage the hull in sections.

When salvaging the ship, the usual method is to stuff a large self-inflatable pontoon into the wreck.

At one end, the pontoon has a hollow cable attached to the salvage vessel. There is an air bag in the barrel that is held in the initial state, so it can sink into the sea at first.

Once the installation is in place, either the ship's compressor on the surface of the sea is inflated into the pontoon through the connecting pipe.

Either by activating the original gas in the pontoon to generate chemical agents, the chemical reaction produces a large amount of gas, and the air bag is sufficient for the pontoon.

Such a pontoon, theoretically, can provide 1 ton of buoyancy per cubic meter of volume, and installing a few more can greatly reduce the output power pressure of the winch of the salvage ship itself.

This time, Gu Kun bought dozens of large pontoons in advance, with a diameter of nearly one meter and a length of three or four meters, which needed to be installed by two people.

Each cartridge is capable of providing 3 tons of rated buoyancy.

In addition, ancient shipwrecks were all wooden, and the wood itself was lighter than water, so as long as there was an additional buoyancy of 30% of the rated displacement, it was enough to fish the ship up.

With a reserve buoyancy of 150 tons, it is no problem to fish a wooden ship of 500 tons. If it exceeds 500 tons, it can also rely on the power of the winch on the salvage ship to exert part of the force.

The power of Gu Kun's ship's winch can withstand a good heavy crane on land when the main engine is not driving and supplying as much force as possible to the winch, which is so simple and rude.

......

The principle is very simple to say, but it is really troublesome to operate.

Gu Kun and Long Wu carefully probed underwater for several hours, and first encountered a thorny problem: the hull of the ship was relatively intact, and when the ship sank, except for a crack in the middle, everything else was intact.

This makes it difficult to choose where to install the pontoons.

In these years, there is no good underwater wired walkie-talkie, and Long Wu can only use the light of the headlamp to communicate with the boss in sign language about technical actions.

"Shove half of the empty cylinder through this hole?"

Gu Kun waved his hand, and then responded with a tipping gesture: "No, the counterweight is unstable, and it will turn over when you lift it up." ”

One of the keys to pontoon salvage is to ensure that all corners of the wreck are stressed smoothly. Otherwise, once it overturns after lifting dozens of meters, the pontoon will jump directly back to the water, and the wreck will be smashed back into the seabed, and maybe more than half of the porcelain inside will be broken.

Long Wu was helpless, and Gu Kun made a gesture for him to tie the heavy hook to a certain position on the other side of the hull.

Long Wu was puzzled, and he couldn't explain it in detail underwater, so he could only do it directly.

It turned out that Gu Kun was planning to make a few big holes on the other side of the symmetry of the groove. Make sure that when the time comes, the pontoons can be symmetrically stressed on both sides and lifted up steadily.

The two abandoned the plan to install the pontoons first, leaving the uninflated canisters aside and leaving them on the bottom of the sea, and then focused on hooking the selected location on the wreck.

After all the tying was done, they spent four hours slowly ascending and returning to the big boat.

Gu Pan then came up with the two of them, gave them hot towels and ginger tea, and Zhang Luo showered them to eat, rest and massage.

While serving his brother to eat, Gu Pan also asked, "I've been busy for most of the day, and I haven't loaded a single cylinder?"

Gu Kun was speechless for a while: "How can it be so easy, just now I took two cylinders down to try my luck." Nine out of ten ships encountered in practice will not be so symmetrical.

Let's get here today, we've got a lot of hooks in the boat. We tightened the hook rope and broke part of the plank, and then went down to make sure. ”

The hooks he laid were all connected to a cable as strong as an anchor chain, and the other end was connected to the big ship, so by pulling the big ship, he could break a few holes in the selected position of the wreck.

If the wreck is too big, you can also use this trick to tear off the wreck first, and then fish it up in sections.

The matter of making money, as long as it is not opened, there is no easy one. Three hundred and sixty lines, there are difficulties in the line.

Gu Kungang sat for a while and regained some strength, and Chen Li in the monitoring room brought another piece of bad news: "Captain, we seem to have been discovered by patrolling, and a clipper is approaching us, less than 20 nautical miles." ”

Do you want to avoid it first?

Gu Kun's mind was racing, and he felt that it was not the time.

"Don't be afraid, we haven't started the official salvage yet, it's easy to hide it. Hurry up and take back to the ship all the suspicious equipment that has been hooked and will show the horse's feet. If someone asks, I'll deal with it. ”

Escaping is something that should only be considered after you have stolen goods, and you can't use it lightly.

Now there is nothing dirty, what are you afraid of?

When I met someone who came to inquire, I said that my brother was measuring the new international waterway in accordance with the law, and you bit me!