Title:
Why is diving so exciting?History revealed, where is the danger?
On November 29, a US military "Osprey" transport plane crashed off the coast of Japan, causing global attention. The tragedy killed eight American soldiers, but it didn't end there. The recent scene is even more surprising - in order to investigate the cause of the crash, the US military sent divers into the water to search for the wreckage, but disappeared in the process, and was not miraculously rescued until a few days later. This incident has attracted a lot of attention and made me think deeply: how dangerous is diving?
Diving, for many people, may be a romantic picture of girls wearing wetsuits, oxygen tanks, and swimming underwater on social **. But in reality, true professional diving is not as romantic as one might think. Looking back at the history of diving, we find that the earliest human diving was simply "streaking" – holding a deep breath and then relying on that breath to move underwater. In the history of pearl diving, people can only dive into the water in order to collect pearls, and in the face of dangers such as sharks, whirlpools, and seaweed entanglement, there are countless deaths.
It wasn't until the 16th century that humans invented the first generation of diving equipment, diving bells. The principle of this device is simple, but there are obvious flaws, the person can only breathe the air inside the diving bell, and the operating range is limited. Later, diving bells evolved into rigid deep-water diving suits, but they were still bulky and not suitable for going deep inside the wreck.
With the advancement of technology, self-brought oxygen diving equipment was born, which is divided into open and closed circuit types. The closed-circuit type was more complex, but more stealthy, and was widely used in military operations, cultivating the famous "frogman" class. The open is simple and easy to use, which greatly lowers the threshold for diving and makes diving popular.
However, there are many dangers hidden behind diving, such as nitrogen poisoning. As the depth of the dive increases, the pressure increases dramatically, causing nitrogen to dissolve more in the blood, which can cause "nitrogen intoxication" – an anesthetic phenomenon that endangers the diver's life. Even the experienced diving guru Hubbert Nitch is setting a record of 253During the 2-meter naked dive record, he suffered nitrogen drunkenness and irreversible damage to his body.
In addition to nitrogen poisoning, divers also face the threat of oxygen poisoning. As the depth increases, the partial pressure of oxygen increases, which can trigger an adrenaline storm that can lead to seizures, spikes in blood pressure, and even life-threatening.
And decompression sickness is a diver's nightmare. When the diver descends, the nitrogen dissolves in the blood and tissues, and if the nitrogen is not completely discharged during the ascent, tiny bubbles are formed, which may obstruct blood flow and cause serious injury. The accident of the Chinese Navy's 418 boat during joint training with the Hengyang ship is a tragic case of decompression sickness, 10 survivors died of decompression sickness, and only Wang Faquan, the chief engineer sergeant, was able to float at sea with food and tools to wait for rescue, and finally survived.
Behind these tragedies are divers facing the threat of sharks, squid, ship wrecks and sharp objects in a complex underwater environment. In the Pula Caves in Norway, a diving accident has left people deeply saddened. Two divers drowned due to an accident that got stuck in a narrow passage underwater. Even in China, Han Ting, who enjoys the reputation of "the first person to dive in Asia", unfortunately died while challenging the deep cave of Jiudun Skylight in Du'an County.
Diving, which may seem exciting, is actually a huge danger. We can't help but wonder why divers face so many challenges and risksPerhaps, this is the ultimate exploration of human curiosity, a brave challenge to the unknown abyss. The story behind diving is not only the continuous progress of science and technology, but also the tenacity and desire of human nature. When we see the images of divers exploring and adventuring underwater, we may be able to better understand the hardships they put in.
Therefore, diving is not a simple underwater roaming, but an adventure into the natural abyss. It is precisely because of the danger and the unknown that diving is more precious and rare. For this unique field, we should not only pay attention to the risks, but also understand the responsibilities and missions of divers. This is not only a deep dive, but also a never-ending exploration of the unknown.