#菲组织称完成冲闯黄岩岛 How the Truth #
When I talk about the sea, it is a vast and mysterious place. But you know what? Beneath that rough surface, there is a little secret hidden - "in the sea". This "nautical mile", how far it is, how many kilometers, and why it is always confusing!
The story of the sea
This has to start with the ancient navigators, when there was no satellite navigation, no electronic maps, they relied on the stars and compasses to find their way on the vast sea. In order to facilitate the calculation of the sailing distance, the clever ancients invented the unit "nautical mile". You draw a straight line across the ocean and say, "Hey, that's a nautical mile!" "Simple, right? But the wisdom behind this is not simple!
How long is 1 nautical mile?
How many kilometers is 1 nautical mile? The answer is: 1 nautical mile = 1.852 km. Seeing this, you may be muttering: "Oops, why don't you use the kilometers we are familiar with?" "This thing is really exquisite. The unit of nautical mile is related to the circumference of the earth, because the earth is a big round ball, so the nautical mile count when sailing can better match the surface of the earth, so that the distance on the nautical chart is closer to the actual sailing distance. To put it simply, it is a "professional counterpart", and it is easy for navigators to use!
The sea is not just a navigator's business
You think the sea is just a little toy for navigators? Wrong! It's a crossover star! For example, if you look at those sailing races, the athletes are rowing desperately, and when the finish line arrives, the radio shouts: "Congratulations, you just conquered 30 nautical miles!" "Doesn't that sound like a sense of accomplishment? For example, the weather forecast says that the typhoon is still a few hundred nautical miles from the coastline, which is not only related to the safety of fishermen, but also a matter of concern to ordinary people.
Little secrets in the sea you don't know
You may not know that different countries and regions have a small difference in the definition of nautical mile. But don't worry, most of the world is now unified, and it's all 1.852 km. In addition, someone asked: "If the earth is so round, will the distance between the equator and the poles be the same?" That's a good question, but it's really different, because the earth is an oblate sphere, and the equator is a little bit bulging. But in daily calculations, this small difference is negligible.
Misconceptions are cleaned up
Some people think that the sea is just a random number, and there is no scientific basis. Wrong! The birth and use of nautical miles are carefully calculated to better adapt to the natural form of the earth. Someone else said: "The sea is so troublesome, it is better to count it directly in kilometers." "Please, every industry has its own rules, and the position of Nauri in the field of navigation and aviation is not something that can be easily shaken.
The sea is not just a cold number, it is the crystallization of human ingenuity, a ruler to explore the ocean, and a deep emotional bond with this blue planet.