Who knows the top ten unsolved mysteries in the world?

First of all, the mystery of the sinking of Titanic

191April 12 is a tragic day-on this day, the British luxury passenger ship Titanic unfortunately sank on its maiden voyage to North America. This shipwreck caused 1523 people to die in the belly of fish, which was the biggest disaster in the history of human navigation and shocked the world. For many years, the real cause of the sinking of Titanic has been the focus of people's exploration.

1985, the wreck of the sunken Titanic was found in the waters near Newfoundland. Then, explorers used various advanced technologies and even dived into the cold and dark deep sea to try to reveal the reasons for the sinking of the Titanic. However, people who dive into the water can only see the appearance of the Titanic, but they can't explore the "trauma" caused by the iceberg impact, because the cracks on the ship have been deeply buried by thick sediment. This situation was not changed until 1996. In August of that year, an international expedition team composed of diving experts, shipbuilding experts and oceanographers from many countries conducted in-depth field exploration. If you don't explore, you will find it amazing. A brand-new statement broke the widely accepted plot of the famous movie Titanic. In this film, the 275-meter-long luxury passenger ship was hit by an iceberg drifting head-on. After a 92-meter-long crack appeared, the cabin flooded and soon sank in the waters near Newfoundland. However, the results of this exploration show that the Titanic was not sunk by a big iceberg drifting head-on. Their sonic detector found the ship's wound. The "wound" is not 92 meters long, but there are six small "wounds" with a total destruction area of only 3.7 -4 meters. In order to enhance the credibility of this statement, the researchers used those data to simulate the process of the disaster on the computer, and the conclusion was affirmative: at that time, the six flooded cabins were not evenly flooded, some with large water inflow and some with small water inflow, which indicated that the holes that were knocked open were large and small. In fact, Edward Wilding, the designer of the ship, had put forward this situation at that time, but this very important testimony was ignored intentionally or unintentionally. Because it was hard for people at that time to accept the fact that such a good ship sank after six small holes!

The "injury" of the ship is also closely related to the hull steel plate. 1992, Dr. Joseph macneice, a Russian scientist, wrote in an article: "The brittle hull steel plate may make people feel that it can be broken into pieces under impact, which is actually a hole opened from the side of the ship." The research results of American scientists on hull steel plates also confirm the above views. At that time, there were many sulfur inclusions in the steel plate, which reduced the hardness of the steel plate, which was also the reason why the hull steel plate was very brittle. Therefore, experts generally believe that iceberg impact may not be the fatal cause; The sudden impact of the iceberg, the speed of the ship is slightly faster and the steel plate is fragile, which is the real reason for this tragedy.

Everything sounds so well-founded, but like all events that don't know the truth, the mystery of Titanic is far from over. In 2004, a sensational remark jumped out in front of the public all over the world, attracting the attention of all those who care about and don't care about the Titanic incident: Robin Gardino and Andrew Newton of Britain exposed the conspiracy theory of the sinking of the Titanic in an interview with British television-0/523 passengers and crew killed in the sinking of the Titanic were not killed by natural disasters, but by man-made disasters! They said that six months before the Titanic's maiden voyage, that is,191Kloc-0/September1Kloc-0/day, Titanic's sister ship "Olympic" was badly damaged when it left Southampton for sea trial, so it reluctantly returned to Belfast port. Unfortunately, the insurance company refused to pay compensation on the grounds that the responsible party for the collision was the Olympic, and the repair cost of the Olympic was extremely expensive, and the White Star Shipping Company at that time was in serious economic difficulties. To make matters worse, if the Titanic can't set sail on time within six months, the White Star Shipping Company will face bankruptcy. So White Star Steamship Company decided to disguise the damaged Olympic as Titanic, and arranged a shipwreck to defraud huge insurance money. It turned out that the White Star Steamship Company arranged a California to dock in the iceberg area of the Atlantic Ocean, in order to save everyone on the Titanic in time when the accident happened. The most critical point that led to the disaster was that the California actually made a mistake in the position and distress signal of the Titanic and did not arrive at the crash site in time for rescue. Gadino, Newton and other conspiracy theorists believe that JPMorgan Chase, the super-rich American and the boss of White Star Shipping Company, is the mastermind behind this insurance fraud case.

The words are deafening and rock-breaking. But many British people scoff at conspiracy theories, including experts from the British Titanic Society. Steve rigby, spokesman of the British Titanic Association, said in an interview: "I have no doubt that the ship lying on the bottom of the North Atlantic is the Titanic."

However, the "ship insurance fraud conspiracy" theorists point out an abnormal situation to prove their claims. First, the Titanic suddenly changed course, probably to welcome the California. Second, after encountering an iceberg, the first mate Murdoch was seen running to Gao Qiao, probably to find the trace of the California; Third, the later investigation report showed that there were no binoculars in the crew cabin, which meant that it was difficult for the lookout to find the iceberg in time; Fourthly, JP Morgan, president of White Star Steamship Company, originally planned to take the Titanic, but cancelled the trip two days before sailing on the grounds of ill health. However, two days after the ship sank, he was found having a tryst with his French mistress, and 55 people canceled his trip. These people who canceled his trip should all be insiders. Fifth, there were some cuts in the process of temporarily disguising the Olympic Games as Titanic. Some people found some lifeboats on the sunken ship leaking like a sieve. Sixth, it is also the most incredible point. Of the more than 3,600 items salvaged from the wreckage of the Titanic, none was engraved with the logo of the Titanic. Seventh, the fact that the California, which appeared in the Atlantic Ocean at that time, did not carry a passenger except the crew and 3000 sweaters and blankets is puzzling.

Second, the mystery of Loch Ness monster

The Loch Ness Monster is one of the most mysterious and fascinating mysteries on earth.

Loch Ness is located in the Grand Canyon in the northern Scottish Plateau of England. It is 39 kilometers long and 2.4 kilometers wide. It's small, but it's deep. The average depth is 200 meters and the deepest point is 293 meters. The lake is not frozen all year round, with steep banks and dense forests. At the end of Hubei, there is a river connected with the North Sea.

The earliest record of water monsters can be traced back to 565 AD, when the Irish missionary St. Columbus and his servants were swimming in the lake. The monster suddenly attacked the servant. Thanks to the priest's timely rescue, the servant swam back to the shore and saved his life. In the next ten centuries, there were more than ten thousand pieces of news about the appearance of water monsters. But the children at that time didn't miss it, thinking it was just an ancient legend or nonsense.

It was not until April 1934 that London doctor Wilson passed by Loch Ness and happened to find the water monster swimming in the lake. Wilson quickly took a picture of the monster with his camera. Although the picture is not very clear, it clearly shows the characteristics of the monster: a long neck and a flat head. It doesn't look like any kind of aquatic animal at all, but like a huge reptile-jujube plesiosaur, which became extinct more than 70 million years ago.

Plesiosaur is a huge aquatic reptile, which lived from/kloc-0 to 70 million years ago and was also a distant relative of dinosaurs. It has a slender neck, an oval body and a long tail. It has sharp teeth in its mouth and feeds on fish. It is the overlord of the Mesozoic ocean. If the Loch Ness monster is really a snake, it is undoubtedly an extremely precious prehistoric animal, and this discovery will also occupy an important position in zoology.

So after this photo was published, it quickly caused a worldwide sensation. With the "dinosaur fever" in the 20th century, people began to associate water monsters with plesiosaurs and paid great attention to them. 1960 On April 23rd, British aviation engineer Ding Side filmed more than 50 feet of film in Loch Ness. Although the film is rough, it is obvious that a giant creature with a long black neck can swim across Loch Ness during the screening. Some scientists who are negative about this changed their views after watching this film. The Royal Air Force and the Air Reconnaissance Intelligence Center analyzed Tinsted's film and concluded that "that thing is probably a creature."

In 1970s, scientists began to search for water monsters on a large scale with the help of advanced instruments and equipment. In August, 1972, Boston, USA, some photos were taken in Loch Ness with some underwater cameras and sonar. One of the photos showed a two-meter-long rhombic flipper attached to a huge organism. At the same time, sonar also found that there were huge objects moving in the lake.

1June, 975, the hospital sent an investigation team to Loch Ness and took more photos. Two of them are particularly interesting: one shows a huge body with a long neck, and it can also show two short flippers of the object. It is estimated from the photo that the creature is 6.5 meters long, and its forehead is 2.7 meters long, which really looks like plesiosaur. Another photo captured the monster's head. After computer magnification, you can see the short tentacles and wide mouth on the monster's head. The conclusion is that "there are indeed large unknown aquatic animals in Loch Ness."

The discovery of 1972 and 1975 was a sensation, which made people feel that it is urgent to solve the mystery of the water monster or capture the live plesiosaur. Since then, Britain and the United States have jointly organized a large-scale investigation team, sent 24 investigation boats in a long snake array, and dragged fishing nets across Loch Ness in an attempt to catch the monster at one fell swoop. But unfortunately, nothing was found except recording some sonar data.

Because chasing water monsters failed, negative views became popular again. A retired electronic engineer wrote in the British magazine New Scientist that the Loch Ness monster is not an animal, but an ancient pine tree. He said that there were many pine trees near Loch Ness more than 10,000 years ago. At the end of the ice age, the lake rose and many pine trees sank to the bottom. Because of the pressure of water, the resin in the trunk was discharged to the surface, but the gas generated from it could not be discharged. So these pine trees sometimes float to the surface, but release some gas on the surface and then sink to the bottom. To people in the distance, it looks like the head, neck and body of a monster. "

But this view cannot convince those who claim to have witnessed the monster with their own eyes. Moreover, in the late 1970s, some people took several photos of water monsters.

So, why can't people catch monsters so far?

This should start with the special geological structure of Nice. It turns out that Loch Ness contains a lot of peat, which makes the lake very turbid, and the bottom can be less than three or four feet. Moreover, the topography of the lake bottom is complex, and there are labyrinthine deep valleys and gullies everywhere. Even giant aquatic animals can easily and quietly escape the detection of electronic instruments. There are many fish in the lake, so monsters don't have to go out for food, and the lake is connected with the sea, so it is easy for monsters to get in and out. Therefore, it is difficult to catch monsters.

But as long as the monster is not really found, the mystery is not solved. So far, no one can draw a conclusion about the existence of water monsters. In this regard, the British writer Chester said: "Many suspects have less criminal evidence than the Loch Ness monster, so they were hanged." This is a humorous and ingenious evaluation of the mystery of ancient and modern water monsters.

Third, the mystery of Kennedy's death.

Since the assassination of President 1865 Lincoln, the American president has been assassinated constantly, and the power halo on his head has almost become the target in the eyes of some "lunatics". However, the background of the Kennedy shooting is particularly confusing. What puzzled the American public was that the murderer Lee Harvey Oswald was shot under the eyes of federal agents and kept silent in front of photographers. jack ruby, who shot and killed people, died mysteriously soon.

Around this case, American public opinion has put forward various assumptions. Some people think that this is a coup plot planned by the CIA and the military hawks; Others believe that the assassination was done by the "mafia". What's more, some people associate Kennedy's death with Marilyn Monroe's suicide. In order to find out the truth of the case, the US government set up a special investigation committee to investigate the whole story of the case. However, after several years of investigation, the investigation Committee finally concluded that Kennedy's shooting was Oswald's personal behavior and had no deeper political background.

Once the conclusion was published, public opinion was in an uproar. Some non-governmental organizations have vowed to get to the bottom of this case, but today, this case is still "fair and just, and the old woman says that the old woman is reasonable." With the passage of time, many parties have passed away, and the rest are in their twilight years. It seems that they want to take this mystery to the grave.

Gunfire on the streets of Dallas may become an eternal mystery in American political history.

What happened:1963165438+1On the morning of October 22nd, American President John F. Kennedy and his wife arrived in Dallas, Texas, and took a convertible to downtown. Mr. and Mrs. Kennedy (sitting in the back row) smiled happily at the welcoming crowd on the roadside. They knew nothing about the coming of death.

At noon 1: 30, a shooting incident occurred when the presidential motorcade passed an intersection in the city center. Before the presidential bodyguard could react, Kennedy was leaning on his wife, and Governor Connery was seriously injured.

After the news of Kennedy's assassination was announced, Johnson immediately escorted Kennedy's coffin back to Washington. At 3: 38 pm, Johnson was sworn in as the president of the United States on the presidential plane of Air Force One returning to Washington, and Mrs. Kennedy stood beside him in shock.

165438+1On the morning of October 23rd, Kennedy's body was transferred from Bethesda Naval Hospital to the White House. 165438+1On October 25th, the US government held a funeral for Kennedy.

Hours after Kennedy's assassination, Dallas police arrested Lee Harvey Oswald, the murderer, in a cinema. 165438+1On October 24th, jack ruby, the owner of a nightclub in Dallas, pulled it out and shot Oswald in front of dozens of federal agents and police, and Ruby herself eventually died in prison.

Fourthly, the mystery of Terracotta Warriors and Horses of Qin Shihuang.

1 March, 9941day, the second pit of the terracotta warriors and horses of Qin Shihuang, the world-famous "eighth wonder of the world", officially began to be excavated. This is one of the greatest archaeological discoveries since this century.

Bronze spear, crossbow, bronze arrow, broken arrow, etc. Some bronze swords, 86 cm long and with eight sides, were unearthed in the No.2 pit. Archaeologists measured with vernier calipers and found that the errors of these eight sides were less than one hair, and 19 bronze sword had been unearthed. These bronze swords are compact in internal structure, bright and clean in body, with fine grinding lines and no staggered textures. They have been sleeping in the loess for more than two thousand years, but when unearthed, they are as bright as new and extremely sharp. After testing, the researchers found that the surface of the sword has a layer of chromium salt compound with a thickness of 10 micron. This discovery immediately caused a sensation in the world, because this chromium salt oxidation treatment method is only a modern advanced technology. Germany invented and applied for a patent in 1937, and the United States in 1950.

When the archaeologists were cleaning the first hole of the No.1 pit, they found that a bronze sword was bent by a clay figurine of150kg, and the bending degree exceeded 45 degrees. When people removed the clay figurine, an amazing miracle appeared: the narrow and thin bronze sword bounced up instantly and recovered naturally. The "shape memory alloy" that contemporary metallurgists dream of actually appeared in ancient tombs more than 2,000 years ago.

In fact, the method of chromium salt oxidation treatment is by no means an invention of Qin Shihuang's era. As early as the Spring and Autumn Period and the Warring States Period, China people mastered this advanced technology.

During the period of the Five Overlords in the Spring and Autumn Period, Gou Jian, the king of Yue, defeated Fu Cha, the king of Wu, and staged the last scene of the hegemony in the Spring and Autumn Period. The passage of time makes this thrilling war sleep quietly in the long scroll of history, and busy future generations almost forget it.

However, while excavating an ancient tomb in the Spring and Autumn Period, an archaeological team accidentally found a long sword covered with mud, and an ancient seal character on the sword-"The Sword of Gou Jian, the King of Yue, for his own use" jumped into people's eyes. This major archaeological discovery immediately caused a sensation in the whole country, but even more sensational news came from the scientific research report about Gu Jian. The first thing that caught the researchers' attention was: Why didn't this Gu Jian rust after being buried underground for more than 2,000 years? Why is it still cold and sharp? Through further research, it is found that the sword of Gou Jian, the king of Yue, did not rust for thousands of years because it was plated with a layer of chromium-containing metal. As we all know, chromium is a rare metal with high corrosion resistance, and the content of chromium in earth rocks is very low, so it is very difficult to extract it. Furthermore, chromium is a high-temperature resistant metal, and its melting point is around 4000℃.

There are too many secrets in Chinese civilization. Who would have thought that the scientific inventions of the 1950s would appear in more than 200 years BC? Who can imagine that the sword wielded by Qin Shihuang's soldiers turned out to be a masterpiece that has not been invented by modern science? The question is, what attitude do we use to explain the extraordinary precocity of this technology after discovery? We really don't want to see someone explain it by "accident". It should have a more specific explanation. If the above facts are true (at least chromium salt oxidation treatment is true), then we will ask: what is their technical source?

Verb (abbreviation for verb) Mystery of UFO

The National Defense Intelligence Agency is a secret intelligence agency within the Pentagon, which is responsible for coordinating the intelligence activities of the US armed forces. The Defense Intelligence Agency works not only for the Pentagon, but also for the Central Intelligence Agency. At the end of 1970s, the American UFO research organization-"Citizens Against Covering up the UFO Truth" submitted an application for access to archives to the National Defense Intelligence Agency according to the Freedom of Information Act. They hope to get documents about the UFO incident from the National Defense Intelligence Agency. At first, like other American government agencies, the Defense Intelligence Agency denied any connection with UFO research. However, in the end, it had to release three compelling UFO files.

The contents of three secret documents released by the US Defense Intelligence Agency for the first time are typical blueprints of American Steven Allan Spielberg movies. One of the three files involves a report that the Iranian Air Force found a UFO on September 1976.

1) 1976 September19 At about 12: 30 in the evening, the Iranian National Air Force General Command received four calls from Michelland residents near the capital Tehran. Residents said on the phone that they had found a very strange flying object in the local sky. Some people say that those UFOs are similar to birds in shape. Some people describe them as brightly lit helicopters. He explained to the residents that the so-called strange flying objects might be stars. After talking on the phone with the air force airport in Merabad, he decided to see those things in person immediately.

2) This month/early morning of Kloc-0/9 1: 30, this F? The interceptor is located in the air about 40 nautical miles north of Tehran. Because the light emitted by this UFO is very strong, it can be seen clearly from 70 nautical miles away. When the plane approached the UFO for 20 nautical miles, the telegraph system and monitoring equipment on the plane suddenly failed. At this time, the pilot had to return to Shalozi base. As soon as the pilot put down the nose of the plane, the functions of the monitoring equipment and signal system in the cabin of the plane were not only restored at once, but also the danger of sudden engine flameout just now disappeared. 1: 40, the second fighter plane takes off. When the plane was in the air 27 nautical miles north of Tehran at an altitude of 150 nautical miles, UFOs began to appear on the radar screen of the plane.

3) This UFO is about the size of a Boeing 707 (tanker). Because the light emitted by this UFO is very strong, it is difficult to make an accurate judgment on its volume. When a UFO flies vertically to the ground, it will emit strong beams of blue, green, red and orange. Because the wave frequencies of these beams look very high, they can all be observed at the same time. When these two F. When the interceptor followed the UFO into the air south of Tehran, another shiny UFO suddenly flew out of its body. This flying body that just flew out is about half or even a third of the size of the full moon in the sky. Then, this little UFO, which just left the mother, flew at a very high speed to two F? The interceptor rushed over. One of the pilots tried to launch a Type 9 air interception rocket at him, but at this time, the control system of rocket launch in the cabin failed and there was no signal on the intercom. Just then, the pilot quickly leaned back and pulled the plane into a high arc, trying to get rid of the UFO. Then he went diving again. However, the original UFO followed, keeping a distance of three or four nautical miles from it for a period of time. Just as the pilot tried to get rid of the tracking, the second small UFO separated from the mother UFO was always in the arc circle drawn by the plane in the air. After a while, the flying saucer flew to the mother and became one.

4) Not long after the small UFO merged with the mother, another UFO suddenly flew from the other side of the original mother UFO, and it flew vertically to the ground.

5) At dawn the next day, a helicopter carried the two interceptor pilots and took them to the place where the small UFO was likely to land last night. There, they didn't find anything related to it except a dry river bed suspected to be the landing point of UFOs. When the team came to the west side, they got valuable information unexpectedly. There lived a family. People in this family said that they heard a loud noise outside in the middle of last night, and with this loud noise, a lightning-like light was emitted outside the house. So people began to test the area and the two planes to see if they had nuclear radiation. If the results come out in the future, we (in this case, the National Defense Intelligence Agency) will report it quickly.

At the beginning of this document, a large list of American government and military institutions is listed. It is not difficult for people to see that this UFO incident in Iran has attracted great attention from the top of the US government.

Sixth, the mystery of ghosts.

In May 2004, a group of urban exploration fans sneaked into an abandoned naval dock in South Plymouth, England. An old lampshade, a dirty mattress, an overturned TV set and even some collapsed wooden beams in the cabin are all the results of their exploration. Suddenly someone found a windfall: he heard a woman sobbing from the depths of the cabin. ...

Start with the "mummy spell"

From 1923 to 1930, 22 people died in Britain, which made magazines and newspapers particularly excited. Their causes of death all point to one thing-the mummy spell. The first one to fall was Lord carnarvon, who won the right to excavate the Valley of the Kings in 19 14. 1October, 1922, 165438+ He and 30 experts found "all wonderful things" in the tomb of the valley: statues, animals and mummies cast in gold, which became one of the most important discoveries in archaeological history. But after this "miracle", four months later, Lord carnarvon fell ill in Cairo for unknown reasons. A doctor said that he was infected by mosquitoes biting his left face. Until April 5, Carnaveen shouted: "It's over, I heard the call, I'm ready." Go to hell. When he died, there were two strange things: Cairo suddenly lost power in the whole city; In England, the Lord's hometown, his dog died at the same time.

Carnarvon's death aroused people's speculation. It is said that when the mummy discovered by the Lord was opened, there was a wound on the left cheek of the corpse inside, which was consistent with the part where carnarvon was bitten by mosquitoes. The "mummy spell" began to spread like wildfire, and the legendary inscription on the tomb was translated as follows: "Anyone who enters this tomb with an impure heart, I will choke him like a bird." "Whoever wants to destroy this inscription can't go home, holding the child, and can't see hope." Scientists who entered the ancient tomb later died of strange diseases. 1929, the first wife also fell, and the cause of death was also said to be a mosquito bite on her left cheek. In those years, the "mummy spell" became a big news, and 22 people who participated in the excavation died abnormally.

The "mummy spell" not only caused panic, but also stimulated some scientists and paranormal lovers. Different from the previous practice of offering sacrifices to appease death and staying at home to prevent disturbing evil spirits, they took "ghosts" to the table for study. By the 1960s, many universities in Britain, such as Edinburgh University, Brunel University and Liverpool University, had opened occult majors, and so-called "soul mates" appeared. More folk "ghost-hunting teams" were set up and ran around the British Isles. Ghosts seem to have occupied the island country overnight: the ghost of King Henry VIII's fifth wife was found in Hampton Palace in London; Under the arch of Edinburgh South Bridge, there lived a family of evil spirits. York is haunted from the cathedral to the ladies' room in the bar. It is called "ghost town" ...

However, under various formal and informal studies, the matter of "ghost" has never been conclusive. Being and not being are divided into two camps, represented by Dr. richard wiseman from the University of Hertfordshire, who firmly believes that "ghost" is only a psychological phenomenon and only exists in people's imagination. Another camp believes that there are "ghosts" in the world, but their views are different: it has been said that ghosts are the souls of the dead. "The soul exists in our bodies. After death, the soul will enter another dimension, but the soul itself may not know its situation. " Another view is that ghosts are records of past images. Evidence includes a soldier who was repeatedly injured in the site of World War II, or a child who died in the park where he often went; "Ghosts" are also regarded as "messengers", and most of them harass close people, similar to the "dream-holding" in ancient China; There is also a view that "ghost" is only the radiation of strong magnetic field.

The "mummy spell" was exposed in the 1990s. John vogt, an Arizona writer, pointed out the flaw of the rumor. For example, in the early morning of Lord carnarvon's death, there was no power outage in Cairo, only the hotel where the Lord was located. It is also a rumor that the English Lord's dog died at the same time. There is still a time difference between England and Cairo. During the period of 1999, a professor from Cairo University checked the health records of people involved in the mummy curse and found that most of them had been exposed to a kind of Aspergillus, which could survive in graves for thousands of years, resulting in high fever and death. The biological interpretation of the "mummy curse" has also given the "ghost" researchers a big blow. Many scientific organizations dismiss all kinds of supernatural research organizations as "full of ignorant superstitions". Although the theoretical basis is insufficient, it does not affect the interest of the British folk ghost hunting team. A member of an organization called Ghost Club said: "We are a group of like-minded people first, and then researchers."

Seven, the mystery of the Korean passenger plane crash

A Boeing 747 passenger plane of Korean Air flying from Seoul to Guam crashed near Guam International Airport at 65438 am local time1August 6, 997, killing more than 200 people.

It rained heavily and the weather was bad. When the plane flew about 5 kilometers near Guam International Airport, it suddenly disappeared from the radar screen and lost contact with the ground control tower. According to witnesses, the plane crashed into a fire group in the dense forest near the airport and heard the explosion.

After 17 hours of intense work, American rescuers found the remains of about 70 victims from the wreckage and accident site of the Korean Air passenger plane that crashed in Guam. Korean Air said that 29 of the 254 people on board were still alive, including four crew members. The National Transportation Security Administration sent a special investigation team to the scene to investigate the cause of the accident. Two "black boxes" on the crashed passenger plane have also been found and sent to Washington for analysis.

The heads of South Korea and the United States have different opinions on the cause of the Korean Air plane crash.

The South Korean side stressed that the navigation device at Guam Airport was in a state of failure at that time, and the personnel on duty at the airport control tower were not FAA employees. Coupled with the abnormal weather at that time, it eventually led to a plane crash. The United States believes that the failure of the navigator should not affect the normal landing of the plane, and asks why the South Korean side changed the Airbus flight on this route to a Boeing 747 charter that has been flying 13 years. Boeing Aircraft Manufacturing Company said that the accident rate of its products was only 1.78 parts per million.

On August 10, American federal investigators said that the investigation found that the computer software of the radar system of Guam International Airport failed when the Korean passenger plane crashed, and it failed to give an alarm in time when the plane approached the ground.

Under normal circumstances, when the plane flies near the ground, the airport radar system will give an alarm, and the ground commander will remind the pilot in time. However, the investigation found that due to software problems, the radar did not find the Korean plane close to the ground, so the pilot did not receive a warning from the ground control tower before the plane crashed.

National transportation safety board officials in charge of investigating the crash believe that the problem of this radar system cannot be said to be the cause of the crash, but on the one hand, there is a lack of preventive measures. There may be many factors in a plane crash.

In addition, before the plane accident, the navigation system that guided the plane to land at Guam airport stopped for a long time; When the plane approached Guam airport, it was raining heavily in Guam, which were all possible factors for investigators to study the plane accident.

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