Section 3 Maritime Positioning

Moreover, even if Chen Dong wanted to stay here and wait for rescue, it was impossible.

The place where Chen Rui was at this time was in a zone of ocean currents.

Ocean currents will flow like rivers due to atmospheric movements and offshore wind belts blowing on the sea surface, or the temperature and salinity of seawater in different sea areas are different, as well as the requirements of seawater continuity, compensating for loss, and replenishing the seawater currents in adjacent sea areas, etc., and the speed of flow is very fast, up to 2.8 km/h.

The ocean current drifted Chen Dong's life-saving inflatable raft in a direction away from the wrecked sea.

In less than half a day, the flow of ocean currents had drifted Chen Dong's inflatable raft far away from the wrecked sea.

Chen Dong inevitably lost his way in the vast sea, and as far as the eye could see, his vision was full of the color of a clear blue sea, and there was no other color.

As a survival expert with extensive experience in surviving at sea.

Chen Dong knows that there are four main things to do at present.

First, determine where you are in the sea area.

Second, water, food.

Thirdly, it is very important to take stock of all the items that have just been collected that are useful for surviving at sea, and now start to use them to prepare for a protracted battle at sea, saving every piece of physical strength and retaining every drop of water in the body.

Fourth, survival requires not only a strong will to survive, but also shrewdness, the ability to weigh risks, and the ability to plan, which is common to survive at sea, in the desert or in the jungle.

Chen Dong first made a simple device using plastic film, a plastic cola bottle, and a few ropes, using the sun to evaporate seawater, the water vapor rose, and when it touched another layer of plastic film, it condensed, and the condensed water dripped into the plastic cola bottle to collect fresh water.

This method is very effective, and it is the best way to collect fresh water before it rains at sea.

Then, with one of the collected shirts, the ends were fixed with ropes and tied to the ends of the inflatable raft to make a canopy to shield them from the blazing sun. Under the blazing sun, your mind will be dizzy, lose the ability to think calmly, and it will make your body sweat, and under the blowing of the sea breeze, accelerate the speed of your body sweating, and in doing so, you will quickly lose your precious body fluids.

After all this, the most important thing now is to determine the location of the sea area where you are now.

First, Chen Dong found a ferry ticket from the pocket of this body.

From Casablanca to New York.

Casablanca is the largest city in Morocco in Africa.

New York is a city in the United States.

Africa is separated from the United States by an Atlantic.

Now, then, you are in the North Atlantic.

Now, Chen Dong has to determine the approximate latitude and longitude of the sea area where he is now.

Ancient navigators have been sailing the sea for a long time, and have summarized a set of useful methods for positioning at sea.

Chen Dong mastered this method of maritime positioning.

The line connecting the north and south poles is called the meridian, and the line perpendicular to the meridian is called the parallel, and the parallel, which is a circle of unequal length, and the longest parallel, which is the equator.

One of the most important stars and constellations in ancient navigation was the North Star and the Southern Cross, through which the North Star and the Southern Cross could determine latitude.

Now, it's daytime, and the North Star and Southern Cross constellations are not visible to the naked eye, only until night.

Now you can determine the approximate longitude of the sea you are in.

The Earth's rotation period is 24 hours, that is, it rotates 360 degrees in 24 hours, 15 degrees per hour, and 1 degree every 4 minutes.

From the port of Casablanca, the time in Zone 1 West is used as the standard time.

Now, Chen's watch shows the time in West Zone 1 as 1:17 p.m.

Then, Chen Dong needs to determine the 'local' time, which is the time in this sea area.

The ancients knew that they relied on sundials.

Chen Dong made a sundial on the inflatable raft and used the direction of the sun's shadow to determine the time.

Around 2:49 p.m. 'local' time.

The time difference is 1 hour and 32 minutes.

This makes it possible to calculate that the longitude of Casablanca is 352 degrees.

The Earth's rotation period rotates 1 degree every 4 minutes and 15 degrees per hour, a difference of 1 hour and 32 minutes, and the longitude is 329.

The longitude here is calculated to be 329 degrees.

Immediately afterward, Chen Dong waited until night to observe the North Star, which meant that he was in the Northern Hemisphere at this time.

With his eyes in a straight line at eye level, and his eyes forming a straight line with the North Star, Chen Dong estimated that the elevation angle of the two lines was about 37 degrees.

Chen Dong can now determine the location of the sea he is in.

Longitude, 329, latitude 38.

This location is roughly southwest of the Azores in the North Atlantic.

At this time, Chen Dong can be sure that the location of the sea area where he is located is the Azores to the northeast.

Chen Dong has to paddle a wooden oar and use the reverse thrust of the water to steer the inflatable raft to the northeast, and when he sees an island or a passing boat, he can be saved.

After determining the position and direction, Chen Dong steered the inflatable raft to the northeast.

At this time, it was about 8 o'clock in the evening, the night at sea was very quiet, only the sound of the splash of the wooden paddle inserted into the water could be heard, the night sky, the stars were dotted, and the white moonlight shone on the sea, with the ups and downs of the waves on the sea, the waves were sparkling and scaly.

Chen Dong began to organize his thoughts.

Crossed over!!

Chen Dong knew this very well and crossed it himself.

In his previous life, Chen Dong had read a lot of books, had a wealth of knowledge in his head, and was very knowledgeable.

Traveling through time and space, transferring from one space to another space at a different time period through a certain way, that is, traveling to the past or the future.

The space we live in is a three-dimensional space.

Front and back, left and right, up and down, three-dimensional.

When people drive a car, going straight forward and reversing backward is the first dimension, turning left or right is the second dimension, climbing and going downhill on a mountain road is the third dimension, then time is the fourth dimension.

All around us, there are time tunnels, and everything in the universe has small holes or cracks, and this basic law also applies to time.

Time also has subtle cracks and voids, and voids smaller than molecules and atoms are called "quantum bubbles", and wormholes exist in "quantum bubbles".

For unknown reasons, Chen Dong's soul passed through the wormhole in the 'quantum bubble' and returned to the past.

The soul entered the mind of a drowned young man and took possession of the young man's body.

Chen Dong found something in the jacket pocket of this body.

A ticket, June 14, 2001.

Some money, dollars, Moroccan dirhams.