It hurts, and on February 20, the day the cruiser was repaired, Martin's system suddenly popped up.

"Congratulations to the host, since you have the first warship in your life, you have opened the hidden achievement [My Journey is the Sea of Stars], as the first step to complete this achievement, the system hereby rewards you with the specialty [Elementary Sea Navigation]. ”

"[Elementary Navigation]: You have learned the basic knowledge of steering and sail control, and you know how to judge the depth of the water and the draft of the ship. ”

"Since you have the [Eagle Eye] perk, you automatically have the perk [Scouting]. You can spot enemy ships faster. ”

To this day, Martin found that the system rarely gave him assignments. However, there are still many benefits to those areas that he has not yet explored, if he has achieved certain achievements.

"See, our Earl's ship is as tall as a five-story building, as big as a hill!"

Nima, did you include the more than 5 meters of draft?

"Such a majestic warship should be invincible on the water, right?"

No, no, no, if it's really invincible, you tell me how this ship sank.

"We have miracle castles and the strongest ships!"

That's not a miracle, that's technology......

At this time, walking in the territory, Martin could hear the discussion of the people at any time. What makes him cry and laugh, and what he can't complain about is these remarks with honey confidence.

After the beginning of spring in February, Martin sent out a dwarven prospecting team. Although the metal ore has not yet been discovered, there is an unexpected harvest - volcanic ash and gypsum ore.

Martin didn't know how the Eight Peaks of Kalas came about, and now, he at least knew that Gentry was a volcano, at least once a volcano.

On the side of the hill near Fort Lorraine is a natural open-pit gypsum mine.

The gypsum ore is transported to the old Lorrainburg, then selected, heated at a very simple 300 degrees Celsius, and then ground to become building gypsum powder.

20%~40% volcanic ash plus silicate ore in the earth's crust, plus gypsum powder.

That's how pozzolana Portland cement came out.

The people were astonished to see that today Martin had instructed the craftsmen to pour cement into a large formwork made of pre-made wooden planks, and tomorrow a solid wall of a meter thick would appear in front of them.

In order to prevent the cement from drying unevenly and causing cracks, Martin asked craftsmen to build the walls at a rate of one meter a day.

Even so, in the eyes of the people, this is already legendary earth magic.

From the new Lorraine to the old castle, the walls stretched at a rate of almost 20 meters per day, and this rate showed signs of increasing as the craftsmen became more skilled, and the tools for refining, sifting, and stirring were perfected.

Although the dwarves could crack the concrete walls with their warhammers, Martin had been prepared to collect a large amount of scrap iron in Bakaria and smelt it into iron bars to act as 'reinforcing bars' for the concrete walls, and as a result, it was not as strong as real reinforced concrete and no less powerful than traditional rammed-earth walls.

On 15 March, when the troops in Lorraine had been assembled and the necessary modifications had been made, Martin announced that he would personally lead the first cross-border trade.

"No, you are a lord, how can a lord leave his territory casually!" Knight Kuden strongly disagreed.

"Lorraine has to support 2,000 professional soldiers, 1,000 lords, and at least 5,000 families waiting to be relocated. We don't have that many fields, and we don't have so many people to mine, to feed so many people with worthless minerals. Cross-border trade is a must. Besides, which of you can sail a boat, and who has the ability to deal with all kinds of accidents?"

Martin was very honest and domineering.

After experiencing a bloody competition, after the gods strengthened his body, his burly and muscular posture, as well as the strong confidence and majesty he unintentionally released, naturally infected the people around him.

The feeling of growing up from a little boy to a dignified lord overnight made the old man very uncomfortable.

"Why does the Lorraine family use the mermaid as the banner, don't forget, the ancestor of our family is an admiral!" Martin said vigorously.

Legend has it that Bakaria's ancestors came from the Northlands.

They refused to become the people of Chaos, separating themselves from their fellow citizens who share the same ancestor and are now known as the Barbarians of the Northlands. drove a simple ship, crossed the ocean, and it took nearly half a year to arrive at today's Bakaria.

Martin bragged that he could sail a big boat, and no one dared to refute it.

After all, in the whole Bakaria, the largest boat is only about ten meters, and it is only a large fishing boat. I couldn't find a qualified captain of a warship.

So, on March 20, Captain Martin set out with 50 Wood Elf archers, 100 swordsmen who vomited not long after they got on board, and dozens of fishermen-turned-sailors, carrying 300 tons of food.

The spring breeze was warm, Martin was in a good mood humming a song, muttering some unknown words such as "the Great Mongolian Navy is invincible", and drove the boat to the source of the Rick River in the southeast.

Sylvie, Gar, Tieno, Assis and the others next to him saw that their eyes were straight.

"How the hell did you learn to sail?" asked Sylvie in a whisper.

"I tell you, my ancestors ......" Martin bragged about not making drafts.

"Don't fool me, the Lorraine family doesn't have any books. Sylvie decisively exposed Martin's lies.

"Actually, I got the apocalypse, and suddenly a voice told me......"

"I don't believe it!"

"Okay!" Martin shrugged, he was also helpless, no one believed such a magical thing as a system elf.

Sailing in the big river is actually quite dangerous, don't look at the Rick River is two or three kilometers wide. For such a large ship to turn around, it actually has to go around a large circle with a diameter of several hundred meters.

The only thing that is fortunate is that the wind blows from northwest to southeast, which is the opposite direction of the Rick River. In other words, you can go back by the wind when you enter the Rick River, lower the sails when you come back, and you can go back with the current alone.

If you want to accelerate, get on the spinnaker.

Watching Martin expertly command the somewhat bewildered sailors to adjust the direction of the sails, Sylvie had no other expression than stunned.

"Alas, we must train a sailor as soon as possible, otherwise I will be a dignified captain and hold a rudder as a helmsman all day long, which will be boring!"

Just as Martin was complaining, a message suddenly popped up by the system wizard.

"When the host has mastered the intermediate navigation skills, the teaching system can be turned on to train the helmsman. ”

Hold the grass, this is all right?!