The new carrier is launched, why not choose the day of the Navy? The author's judgment is mainly related to the tide.
01
1. Interpretation of the time period for launching the aircraft carrier from the tide table (TIdeTable)
Table 1 shows the tidal table, which is the forecast of the tidal conditions in Dalian on the day of the launching of the aircraft carrier. It shows that the tide reaches the highest point at 9:33 am, which is 3.07 meters. The second climax of the day was at 21:50 in the evening and is expected to be 2.88 meters.
Obviously, the best launch time for the aircraft carrier is to take the tide in the morning. According to the news, the actual launch time starts from 9:10. In fact, it is still inaccurate to say that the water should be out of the dock. Actually, since the water is injected from the dock, the aircraft carrier has floated from the base and it has been launched.
Why aren't other dates launched?
Table 2 is the tide table on April 25. The first wave of tides on this day, the climax is around 9 am, but only 2.85 meters, and the difference between the 26th and about 20 centimeters. And the time is about half an hour earlier. Because the ship is unloaded from the water is a very important thing, the moment the person comes out of the mother's belly. Therefore, we must be cautious. According to the ancient sailing habits of the West, we must hold a bottle throwing ceremony to celebrate this important moment.
With an extra 20 cm height, it is 20 cm more secure. Not waiting for the boat, not the day. Therefore, the 26th is the most suitable for the first month of the lunar calendar in April. The morning tide is just in the middle of the working hours, and there is no need to arrange so many overtime workers.
Table 3 is the tide table on April 23, the day of the Navy.
The first wave of tides on this day was 7:33 in the morning, only 2.33 meters high, and the tide height was 80 cm lower than that on the 26th. If this day is launched, the first is that the morning preparation time is rushed. All the preparation work is two hours ahead of the 26th. All the people must be in place 2 hours in advance, and the person who does the work will have to stay up all night. The docker is awesome! The second wave of tides on this day was at 19:46 in the evening. If it was launched at this time, it would have to be a night of light and a dangerous operation.
02
Second, try to interpret the tide from the photo of the aircraft carrier
Figure 1. The water surface in the dock is significantly lower than the outer sea surface. Why is this?
figure 1
Because as long as the water is injected to the ship to a certain height, the water in the dock can not rise and fall like the outer surface of the water, as the tide rises and falls.
The water in the dock, if it also rises and falls with the tide, it is fun. After a while, the boat floated high with the tide, and then the tide fell very low, even causing the boat to sit at the bottom! What is the result of sitting down? Of course, the consequences are unimaginable, and the ship's keel may have been cut off!
In addition, pay attention to the small boat pointed by the left red arrow, the deck is significantly lower than the dock plane.
figure 2
image 3
The above two photos, Figure 2 and Figure 3, are shown on April 25th. At that time, the preparation work before the launch was not completed, but it was completed two days before the dock water injection work. The three cables on the side of the bow (port side in English) are loose.
Figure 4
Figure 4 is taken at the moment before the aircraft carrier is unloaded. There are only two cables left on each side of the bow, and one of them is almost tightened. Compared to the previous day, the visual inspection has been floating at least two or three meters. Because the dock door is now open, the water in the dock is as high as the outside. At this time, the water surface is also very close to the dock plane.
Figure 5
Figure 5 should be taken at the same time as Figure 4, except for the far view, the tail of the aircraft carrier, the outer tug is about to be in place, and the cable is already tightened.
Figure 6
In this picture of Figure 6, on the right side of the eight busses, a small boat is leaning against the dock. Compared to Figure 1, the boat deck is already higher than the dock on this photo, and the photo of the boat deck is at least one meter lower than the dock plane.
How long did it take to get out of the dock? Figure 6 The shooting time of the original photo, the display is 10:03, the moment the new aircraft carrier is about to move.
Figure 7
In this photo of Figure 7, the original display time is 10:15:30, completely unloaded and began to turn around. That is to say, it took almost 12 minutes for the aircraft carrier to complete the work at the dock.
Figure 8
Figure 8, this photo shows the original time is 10:41:40, and you can dock at a minute. The aircraft carrier is docked on the starboard side (the starboard side is called the starboard side).
Congratulations on the construction of the first aircraft carrier made in China! Countless Chinese aircraft carrier dreams, dreams come true.
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