Long voyages are boring, boring, and I make people despair.

The people in the surveying and mapping department are the same, but compared to the crew members who stand outside and watch the sky boringly, they are still working, and they are still working meticulously.

Once the ship is opened, there are not many people who can actually use it, and the boiler burner is filled with a few shovels and coal, and then you can sit down and rest for a while, and then fill it later, and the rest of the crew only need to keep an eye on their position so that they don't make mistakes, and there is actually nothing for them to operate.

So, boring, boring, in a daze, desperate.

The situation in the surveying and mapping department was different, they occupied the command rooms of the three transport ships, but fortunately, there were not many people, only a dozen or so, although it was obviously crowded, but it did not affect the captain's command.

Besides, at this time, there is a fart command, the formation is moving forward, and the ships behind need to follow the trajectory left by the ships in front, unless there is a problem with the ship, and the captain needs to be used.

Therefore, when sailing in formation, the leading ships are the most tired, not only to ensure the course, but also to detect mines and prevent them from running aground.

The closer you are to shore, the more likely you are to run aground, so all the fleet can do at the moment is to get as far away as possible from the shore.

And then the result was that the people standing in the command cabin couldn't see the land in the distance at all.

They could only determine whether they were far from the mainland by the soldiers on the lookout, by the telescope, which was not very good.

And the lookout soldiers on the lookout can only just be seen, and then there is another problem that has to be paid close attention to, that is, whether it is a warship or a transport ship, there are two soldiers watching from the lookout on each ship.

One hundred and seventeen ships, two hundred and thirty-four lookouts, it is impossible to make a mistake, and never will be, unless all the two hundred and thirty-four lookouts have their heads short-circuited.

In this era, there was no speedometer, and all the equipment on the ship was very rudimentary, not even a pressure gauge, so only rudimentary equipment could be used.

It was also a huge challenge for the surveying and mapping department, but in the past few years, they had become accustomed to the situation and had completed the final route map from North Korea to Annam along the coastline.

And the way they draw is very simple, a sketch, a revised drawing, a final version of the navigation chart.

The sketch indicates the type of vessel, the current speed, and what the speed is, but the type of vessel, coupled with the cabin pressure data provided by the rudimentary equipment, is their speed standard.

Because of a large number of industrialization and a large number of unified standards, this convenient move has been brought about, and they only need to draw a nautical chart according to the current situation, and different ships can calculate a nautical chart suitable for their own situation according to this nautical chart.

For example, if a warship is running at full speed, they are twice as fast as a transport ship, and they only need to multiply the data on the route map by two, and this is their route map.

None of the route maps are fixed, and each ship must be changed according to its own situation, so as to determine its own position, determine whether it is yawed, and make timely modifications.

The other is to determine one's position on the route based on the compass and its position from the continental shelf.

The surveying and mapping department does not need to worry about how to go, it is not their responsibility, their job is to draw the trajectory of the fleet and mark the important nodes.

For example, when and where the turn was made, and what the scale on the north hand was, should be marked every other hour.

More than 4,000 pieces of scratch paper have been used, more than 4,000 sheets have been used to modify the drawings, and the final version of the route has 350 small maps, and each small map has marked the detailed route of 20 miles, even if this route has not changed, and there is nothing to pay attention to, but it is still made according to the requirements of 20 miles.

The 100-mile standard nautical chart is to draw five nautical charts onto one drawing, and draw seventy charts, which are used for three hour correction charts, and every three hours you have to compare this chart and determine your position against the parameters above.

Then there is the 300-mile standard chart, which is a larger reference, and you can look at it every day when you set sail or stop sailing, and compare it. This is basically the standard distance of a day.

There is also a general chart at the back, this is the entire chart drawn into a drawing, there is not much detailed data, but people can see about where the route has changed dramatically, this is a reference, not very useful for specific voyages.

Three drawing groups, carrying out the same drawing work, and each chart has been recorded in detail, after the night stoppage, the three drawing groups meet to discuss today's drawing work, if the result is the same, all happy, everyone can wash and sleep early, if the result is different, then it is necessary to have a more rigorous discussion, we must find out who is right, who is wrong, this is not true, the chart is wrong, it will be a huge threat to the future navigation, and it is even possible to let the passing ships run into the reef and sink.

And for a long-distance ship like theirs, each ship is loaded with something of great value, even if the thing itself is not valuable, but after such a long distance, he is also very valuable.

Therefore, the detailed information on this chart indicates the location of the starting point, the data of the ship's compass down to the scale, and the specific time of the course change.

What the? You say it's not easy to know the exact time at sea?

Well, that's not a problem at all, and sea voyages don't take a specific amount of time, they just need to write down how long it took to complete the route on this chart.

In the command cabin, there are two hourglasses, one large and one small, one is a quarter of an hour, and the other is an hour, which are marked with detailed parameters, each of which has ten equal lines, a quarter of an hour is half an hour, ten lines, which means that his accuracy has reached three minutes, and the up and down error is three minutes, as long as it is not a reef, this error is not a big problem for navigation.

Although it may not be very useful in practice, the charts must be made carefully, just in case, and you may be able to use them when.

In the afternoon, the warships that had gone to explore the road returned, and they were directly separated from the fleet and went a little north-east, and during this time the speed of the fleet was also halved, and they had to save coal and avoid detours, otherwise they would have to find a place to dock and go in search of coal.

As it turned out, Yu Ji's suggestion was correct, and they really should have turned.

So, the fleet began to turn and continue along the return route of the warship, and at the same time, they had one more task, when the voyage was suspended at night, they needed to communicate with the navigators on the warship, determine the route data of their exploration, and use this data as the final data.

And before that, the warship was separated from the position of the fleet, and three drawing groups were also marked.

Although the route to use the warship was determined, the drawing team still did not slack off at this time, they still had to complete the drawing task for a whole day, even if it was a route that was about to be abandoned, they had to draw it, just in case, this is a spare tire.

Sunrise and sunset, the tide ebbed and flowed, the sky was sometimes clear, sometimes cloudy, sometimes stormy, but this did not affect the entire fleet.

Because it is along the continental shelf, and it is the first voyage, the speed is not fast, the time to set sail every day is relatively early, but the time of suspension is also very early, according to the normal voyage can go a day's journey, the fleet has only traveled about eighty or ninety percent of the distance, and then began to stop sailing, sending smaller ships towards the island, looking for a suitable place to dock and shelter from the wind.

Some places are more suitable, while others are not available at all, so the next day, they have to slow down and look for suitable islands along the way, and then mark them.

With Pang Bing's rich sailing experience, the fleet successfully avoided five extreme weather, although there are some losses, but the loss is not big, although the wind is strong, but it is not enough to form a ship formation of hundreds of ships, plus the cover of the island, when the wind stops, the shipbuilding industry will immediately repair the damaged ships, there are two professional repair ships, there are all the equipment on it, if you move to land, you only need to build ships and some large facilities, you can directly build ships.

A month or two months passed, and the islands along the way gradually became continental shelves, and the entire continent was completely complete, and for half a month in a row, they never saw large islands again, or rather, the continental shelf never disappeared.

The four-month voyage time is not counted from the time of departure, but the time when the ship is moving, and only the time from the beginning of the voyage to the end of the voyage is counted, according to twelve hours per day, thirty days per month, a total of one hundred and twenty days, that is, the limit time of the ship's voyage is one thousand four hundred and forty hours, not one hundred and twenty days.

So, the fleet still had about seven hundred sailing hours left to squander.

So, Pang Bing began to send people to land, and according to the calculation of the drawing team, they had left the mainland about 15,000 miles at this time.

But the landing did not have any effect, the Marine Corps was divided into two battalions, with two companies as a unit, respectively in four directions, each with a tank and an infantry armored vehicle to explore, according to the speed of the Marine Corps' march, a day can march about 140 miles, in fact, the conditions here are very sloppy, the speed of the daily march is only more than 60 miles, two days later, the Marine Corps without any gain can only return, back and forth, more than 120 miles deep, the primitive can not be in the primitive.

As a result, the fleet was delayed for four days, and after no gain, it had to set sail again and set off for the next goal.

But Pang Bing is extremely convinced that he has discovered a new continent that is deserted, and is there anyone inside the continent? He wasn't sure, he didn't need to be sure, he would send someone here later, and all he needed to do was find out, even if he didn't find anything, he actually gained a lot.