With the Dinghai Navy as the center, the entire nautical chart began to be perfected, and even Lianyungang was not incorporated into the mainland, and most of the coastline of the entire Yellow Sea and the East China Sea was completely different from that of later generations.

In later generations, located on the seaside, there are islands with dense stars, in this era, there will only be more, these small islands that were not very eye-catching, but they have become a marker, in the past, some islands, too far from the shore, will not become a supply point, but now, under the attention of the Ding Navy, it is found that in the surroundings, there are so many places that can be used.

Dingjun gradually began to explore the surroundings, whether it was on the sea or on the shore, one by one coordinates, one by one data, sent to Zhao Xin, Zhao Xin from these data, summed up the general rules, and then, drawn into an acceptable chart, just when Zhao Xin thought that he would always draw like this, a news suddenly came.

A sea ship that is about 90 miles away from the Dinghai Navy, carrying out routine training, was attacked by pirates, the sea ship found a small island, the captain of the sea ship, because of the careless relationship, chose to be close to the island, he did not mean to go to the island, just want to go to the island, around the island to explore, mainly the general shape of the island, length, width and height, and some landmark buildings to help future ships, when passing near this small island, to identify.

However, when it went around the front and to the side, the whistle rang out, and at least 12 ships of all sizes rushed towards it like ants, a small half of them, even mixed oars.

This kind of boat, in the middle of the sea, is looking for death, under the three feet of waves without wind, the oars are easily overturned by the waves, but in the calm water, in the leeward of the island, it will gain tremendous speed.

To tell the truth, these ships have been converted into sea ships, but they have no weapons, although each ship, there are 10 soldiers on board, to protect the safety of this ship, but this protection is not aimed at, at least a dozen ships, hundreds of pirates.

The captain was an experienced one, and when he heard the arrows, he knew something was wrong, and immediately took out his binoculars to look out, and when he spotted the pirates rushing up, he quickly made the right choice.

Didn't turn around and run, although this ship is also equipped with some auxiliary facilities, but unfortunately, the boat is still too big compared to these mixed paddle ships, and the auxiliary is okay, if you want to rely on these manpower, reach a certain speed, and rush through these small pirate ships, this is almost impossible.

The experimental ship did not intend to anchor, so it did not reduce its speed much, at this time, the wind just happened, although the direction of the wind was in the direction of the pirates, but they were not afraid at all, and directly raised all the sails.

On a ship of less than 60 people, it was extremely nervous at the time, and the captain was very experienced, but the others, not so much experience, the arrival of fierce pirates, or the captain encouraged everyone.

At this time, when they are caught up by pirates, or board the ship, the only thing waiting for them is death, and the speed of the ship must be increased.

In the direction of the wind, 2 soft sails and 1 hard sail were almost fully opened, and the soft sail and hard sail were all strained, and the speed of the boat was significantly accelerated, and in the cabin below, among the few people, almost 10 people were transferred to the right to push the pedal below to increase the power of the boat.

The powerful power brought by the powerful sails, assisted by the manpower in the cabin, increased the speed of the ship to the maximum in the time of a stick of incense, almost more than 8 knots.

This speed, compared to the 30 knots entry speed of warships in later generations, is almost as slow as an ant, but in this era, this is an incomparable high speed.

The two sides walked in the opposite direction, and in the time of a stick of incense, the distance between the two sides was close to about 300 steps, and even without binoculars, you could see the hideous face of the pirate on the other side.

In the Northern Song Dynasty, there were pirates, but more in the south, the busy Southeast Asian routes, where the islands were dotted with various active merchant ships, was where the pirates really flourished, in the north, maybe to Korea or Japan, there would be sporadic pirates, and in other places, there should be none.

The reason is very simple, the Northern Song Dynasty was too powerful, even if it didn't put its mind on the ocean, but the busy maritime trade and shipbuilding industry also allowed the Northern Song Dynasty to have patrol sailors, and these sailors had no problem dealing with these unfashionable pirates.

It is precisely because there are very few, and because most of the water shipping of the Dinghai Navy is concentrated in the distance from the Dinghai Navy to Haizhou, the Dinghai Navy has not been attacked by pirates since its establishment more than a year ago.

No one knew that here, 90 miles east of the Dinghai Navy, there would be pirates on such an unknown island.

In fact, this is a pirate lair, you know, the pirate is generally active in the area, and their lair, this is some distance, in order to prevent being served in a pot, here, is already the oldest kind, mostly family logistics, because it is relatively remote, deep into the sea, not afraid of being discovered.

Who knows, the experimental ship of the Ding Navy ran to the vicinity, and when they arrived nearby, they attracted the attention of the pirates, this island is not small, and the environment is relatively complicated, in the dense forest, there are pirate camps.

Himself, not worried about being discovered, but this ship, actually not passing by here, but not listening to the circle around the island, God knows what to do, after careful consideration, the remaining pirate leader, chose to attack him.

After knowing the direction of the other party, they chose to be on the north side, which is a large bay, which is a place where the pirates dock and take shelter from the wind, as long as the ship arrives here, relying on the speed of the mixed paddle boat, they can't run away.

In fact, at a distance of 300 paces, the pirates have already exerted their strength to eat, all the pirates, are crazy rowing oars, this strange ship is not small, almost more than 600 materials, at a glance, you know, it is a good sea ship, even if there is no cargo, a ship is enough.

300 steps is already the limit, the two sides are opposite each other, after the speed is turned on, the sea ship has begun to turn slowly, seemingly contact, but between the two sides, the distance is still maintained, because the sea ship slightly deflected the direction, at the speed of the sea ship 8 knots, the distance between the two sides was shortened to 300 meters, and began to lengthen.

The pirates were not willing to fail, but at sea, this kind of relatively old mixed paddle boat, their speed, obviously can not keep up with the speed here, even if it is just a simple change, under the premise of the wind, the speed of 8 knots has exceeded the speed of the paddle boat, the speed of the paddle ship was about 4 knots at first, and then gradually accelerated, it was only 8 knots.

The difference of 3 knots may not be obvious on high-speed warships, but it is especially obvious on ships with a speed of only 10 knots, not to mention, these pirate ships, which are relatively old, and the position of the designed oars is not reasonable, and their theoretical limit speed is only 6 knots.

From 300 meters, it lasted for about a stick of incense, and then the distance between the two sides was widening, which was equivalent to saying that the navy was an experimental ship, and after a little circle, with a distance of 300 meters, the distance of the absolute square and the long-range attack, a beautiful turn, left this terrible pirate island.

It wasn't until an hour later, after the pirate island gradually became smaller and there was no sign of any ships around, that he relaxed a little, and the captain Zhang Zhonghe let out a long breath, really hell, there would be pirates in such a close place to the Dinghai Navy.

Of course, because it was not on the surface of the sea, or it was ambushed in some particular strait, it was obvious that the place should be a pirate lair, and the captain was very experienced in sailing, and he knew that this should be a certain pirate lair.

There are also those soldiers who are also relieved, there are almost no professional soldiers in the Dinghai Navy, basically they are all transformed on the basis of the box army, or the militia group, these soldiers, if it is the form of the longbow regiment, there is also huge combat effectiveness, but unfortunately the longbow regiment is an elite army, these on the ship, mainly ordinary van army, infantry equipped with heavy equipment such as infantry armor, no matter how well-equipped they are, there are only 10 people, facing more than 150, extremely vicious, and even a large number of long-range weapons pirates, It's really hard to beat four hands with two fists.

It was quite a lucky thing to be able to run away, they had undergone rigorous training, although they would not turn around and run, but on the sea, where could they run, once they were surrounded, they could not jump into the sea.

The same is true for others, in fact, these people, most of them, came out of peacetime, they rarely even experienced a fight, let alone a naval battle, looking at the ferocious pirates, the shadow of death, it seemed to be right in front of them, almost scared away.

Zhang Zhonghe is the most stable among all people, perennial sea experience, of course he has encountered pirates, for pirates, can only fight hard, can not fight, then there is only death, really willing to stay alive pirates, very little, to put it bluntly, the strength of the Northern Song Dynasty, is also the root of their lack of survival, once noticed by the Northern Song Dynasty Navy, pirates are a disaster.

Under the encouragement of a skilled captain, the sailors on the ship quickly regained their motivation, although it was said that the test project had not yet been finalized, but no one, including Zhang Zhonghe, had the heart to continue, and found such a group of vicious pirates in such a close place to the Dinghai Navy, which was a big deal, which was more important than testing and training.

After asking the lookout and the surveyor, and knowing that the distance data of the island had been measured, Zhang Zhonghe breathed a sigh of relief.

Although, for the so-called nautical charts and coordinates, I don't understand much, but I don't delay Zhang Zhonghe to use it, he is an old captain, when he sailed before, according to what, on time on the coastline, through the general reference, to gradually discover the location.

The shore is easy to do, but the depths of the ocean are very difficult to do, which is also the fundamental reason why the pirates are difficult to find, unless it is when the pirates are hunting, block it on the spot, otherwise as soon as the pirates leave, they will enter some small islands deep in the sea according to the familiar waterway, or the reference, these islands, not many times, not familiar at all, even if someone occasionally has been to once, the next time again, can not be found.

But with nautical charts and coordinates, it is different, according to this nautical chart and coordinates, as long as there are no dark clouds covering the sky, with the measurement of special instruments, there is no problem to come back a few more times.

He had fought with pirates before, a distance of 300 steps, in fact, it was already an extremely close distance, for a speed close to 6 knots, a speed of 8 knots, and a relative speed of 14 knots, the speed of one second reached 7 meters, 300 steps, that is, about 200 meters, that is, if there was no special control, a slight deviation, in 30 seconds, the two sides collided.

The fully armed pirates, and the surveying ship with only 10 professional soldiers, which are stronger or weaker, can be seen at a glance, and if they really fight, maybe they will die.

The same is true for the leaders of the "good danger" soldiers, they have received the grace of the Dinghai Navy, and it is definitely impossible to leave casually, but they are really fighting to the death, and they can't accept it, and now, they can spend it smoothly and escape, which is a good choice for anyone.

The soldiers are still on alert, the lookout post at the bow and stern of the ship, at least 5 lookouts, are all engrossed, above the sea, what if pirates appear again?

It is almost 90 kilometers away from the Dinghai Navy, the direction of the monsoon, not the opposite, but also in one direction, the speed is not maintained at 8 knots, but the speed of 5-6 knots, the speed per hour is close to 10 kilometers, 90 miles, but it is only 4 and a half hours, almost in the middle of three or four o'clock in the afternoon, it returned to the Dinghai.

At this time, I came back a little earlier, you know, on the sea ship that is crazy about experimenting and training, the time of return is generally about the evening, half an hour after dark, and now it has returned more than 2 hours in advance.

However, its return brought back a huge news, on the east side of the Dinghai Navy, on an island more than 90 miles away, pirates were discovered, and they clashed with the pirates, and the pirates sent at least 12 wooden oars to attack, and the pirates alone saw more than 150 pirates.

150 pirates are not a small number of pirates, among pirates, there are already a lot, and 12 ships are also a lot, and this force must be taken seriously.

Although the pirates have not yet attacked the Dinghai, but the threat has appeared, for the Dinghai, the biggest threat is the pirates, such a sudden situation, no one will take it lightly, soon, the entire Dinghai Navy's port, the fortress, entered a state of emergency, and the first time to the news of the pirate island, informed the Jiedu envoy Zhao Xin.