In this day and age, there is no automatic navigation system. Pen & Fun & Pavilion www.biquge.info

The whole ship is a whole and requires the collaboration of many people.

In order to reduce the burden on the sailing machine, the installation of sails is still indispensable.

The sail itself is a university issue in terms of placement and operation.

Therefore, when Qian Rujun exchanged the manual and handed it over to the staff of Qinhuangdao, he was also very distressed.

Because the points for changing books are not counted.

The various exploded views in the book take up a lot of the pages.

And every page will take up a lot of her points.

She couldn't just print one.

Make sure you have at least one copy of the full version. There is also a book that can be folded open for everyone to copy.

The process of sailing a ship involves a lot of calculations.

However, when drawing a map, there are a lot of calculations involved.

The person who counts and the person who measures are still different people.

The people who draw are also different people.

Qian Rujun is also not confident in whether they have done a good job of coordination.

Qian Rujun has already given some of the trigonometric functions to the students, and they can understand it because their brains are very smart.

Perhaps because trigonometric functions are so abstract, they can imagine it.

It's not a problem to draw the path you have traveled.

What's more, among the more than 1,000 of them, many of them are good at painting.

Geography itself is Qian Rujun's interest, and Qian Rujun is also very clear about the teaching of this direction, so this is also the focus of Qian Rujun's training.

It's just that Qian Rujun thought that if he followed the newly conceived plan, he would go down the mountain for a while, and it would already be snowy.

The path in the mountains is different from the flat land, and any small change in the terrain can kill you.

Visiting Changbai Mountain and picking ginseng, if you have to do both of these things, is there enough time?

In this era, it is not a day or two to walk the mountain road, passing through Changbai Mountain and Dabai Mountain, although it is not a big deal in later generations. But in this era, all roads have to be walked out, and it is not a matter of one or two days. It's not unusual to spend a few years.

Recently, it occurred to her that in fact, the thousand-year-old ginseng was nearby, and the e-book would have a faint reaction.

So as long as the thousand-year-old ginseng is nearby, she can let people go down to pick it, and picking ginseng takes more time for her than looking for ginseng.

Perhaps, this is done by combining walking and ginseng harvesting.

I'm just afraid that after the students are dispersed, someone will be missing.

But this method seems to be very feasible, because they can go down the mountain instead of going back the same way, but directly cross the state and cross the mountains to return to their home and their boat.

You don't have to go back, you can save half the time.

No one else had a radio or a cell phone to tell the ship where he was.

However, Qian Rujun can transmit the paper information back to the ship as soon as possible through the way of space transmission.

As long as the ships do not mutiny, they will come to pick them up.

It's definitely not a problem to have a boat come and pick them up at any time.

Qian Rujun thought that according to the location, they could let the ship pick them up in Licheng.

Now that the target has been determined, the ship has determined the direction.

However, with the navigation technology of this era, Qian Rujun has no way to develop, the primary geolocation system, of course, there is no way to come to a satellite navigation, that is to say, they can only rely on computing power to be able to stay away from the land, and continue to sail in places that cannot be seen on land.

Every once in a while they had to turn the boat back to a place where they could see the land and check the direction, which involved a lot of calculations.

Speaking of calculations, where computers can help, these calculations aren't a big deal.

The problem is that what Qian Rujun has in his mind does not exist.

So there are always a lot of calculators around the helm, and while he is at the helm, they are always calculating and even when there is a conflict in the calculation, they have to discuss.

Otherwise, in places where there is no land in sight, this kind of plover is very dangerous.

When Qian Rujun asked people to practice, he didn't dare to hand over the ship to him if he was not 100% sure that there was no problem with his ability to steer.

The slightest difference can lead all people astray.

Even Qian Rujun has no way to grasp the direction in the process of not seeing the distance.

The place where the horizon exists is always the horizon, that is, unless you can stand on a high point, otherwise, you will always see the same horizon with a telescope, and there will be no sudden land.

It has to do with the perspective.

Anyone who knows how to measure calculations knows.

Their purpose in staying away from land is actually not to let others find out about their whereabouts.

But at night in this era there are almost no lights and there will be no lighthouse, so the night is the most dangerous for them, even if they stop drifting at sea.

The sea is not always stationary, it will continue to rotate, in addition to the rotary motion, there are many ocean currents along the coast, there are large ocean currents, there are small ocean currents, among which the large ocean currents will constantly drive them north during this season.

And the small ocean current does not know the direction of the determination. Unless Qian Rujun can stay in a sea area for a long time to observe, he can determine the direction.

But there are also many currents that are not directional.

So they are always moving forward, constantly correcting and correcting.

At night, when people can't see or see at night, they don't dare to light the lights even if they are a few meters away.

Stopping in a place where land could not be seen, if they wanted to light the lights on the boat, they would put a black curtain and cover all the windows and light them indoors.

In the absence of lights, the lights travel far and wide, allowing people to notice the abnormalities of the sea.

Qian Rujun didn't want some terrifying legends to appear on the sea, so that people didn't dare to amuse the water on land.

Let all people live under the dark, this return to the traditional way of life, Qian Rujun can't stand it. The trainees can hardly stand it either, because the night is also their study time, and wasting time is unforgivable for them.

It's not yet time for them to go to war, and they know that their task is to keep learning. Increase your chances of surviving in the future.

Qian Rujun came to the helm room.

This is always the place with the most expanse of views.

Controlling the ship in the wheelhouse, even the vertical planks are props used to control the direction, and there are certain calculation standards.

After Qian Rujun arrived, the helmsman handed over the helm to the deputy helmsman. And tell him exactly where it is now.

He stopped intently and prepared to answer Qian Rujun's question, because not concentrating on the helm is fatal in this era.

Because he is calculating all the time, and there is no room for interruption.

Because they don't have all the handy devices of the afterlife, only a mind. There is no room for distractions.

So the helmsman has to have a good brain.