longitude by chronometer

简明释义

时间求经度

英英释义

例句

1.The captain checked the ship's longitude by chronometer to ensure they were on course.

船长检查了船只的经度通过计时器以确保他们在正确航线上。

2.Navigators learned to calculate longitude by chronometer as a crucial skill for long voyages.

导航员学习如何计算经度通过计时器，这是一项长途航行的重要技能。

3.In the 18th century, ships relied on longitude by chronometer to avoid dangerous reefs.

在18世纪，船只依靠经度通过计时器来避免危险的暗礁。

4.Sailors used to determine their position at sea by calculating their longitude by chronometer.

水手们曾通过计算他们的经度通过计时器来确定他们在海上的位置。

5.The advent of the marine chronometer revolutionized navigation, allowing explorers to measure longitude by chronometer accurately.

海洋计时器的出现彻底改变了导航，使探险者能够准确测量经度通过计时器。

作文

The concept of determining one’s position at sea has always been a critical aspect of navigation. Among the various methods developed over the centuries, the technique known as longitude by chronometer has proven to be one of the most significant. This method revolutionized maritime navigation in the 18th century, allowing sailors to accurately calculate their east-west position on the globe. Before the advent of this technique, sailors relied on dead reckoning and celestial navigation, which were often inaccurate and could lead to disastrous consequences. The longitude by chronometer method involves the use of a precise timekeeping device, known as a chronometer, to determine the difference between local time and Greenwich Mean Time (GMT). By knowing the exact time at a fixed reference point (Greenwich) and comparing it to the local time determined by the position of the sun, navigators could calculate their longitude. Each hour of time difference equates to 15 degrees of longitude. Therefore, if a ship’s chronometer showed that it was 2 hours earlier than GMT, the navigator would know that the ship was located 30 degrees west of Greenwich. The introduction of the marine chronometer was largely credited to John Harrison, an English carpenter and clockmaker. His relentless pursuit of a reliable timekeeping device culminated in the creation of H4, a highly accurate marine chronometer. In 1761, the British government offered a reward for a solution to the problem of longitude, and Harrison’s invention proved to be the key. The success of the longitude by chronometer method not only enhanced maritime safety but also facilitated global trade and exploration. However, the implementation of this technique was not without challenges. Early chronometers were expensive and required careful maintenance. Many sailors lacked the training to use these devices effectively, leading to errors in navigation. Additionally, the accuracy of the chronometer could be affected by factors such as temperature changes and the motion of the ship. Despite these challenges, the longitude by chronometer method became widely adopted and marked a turning point in the history of navigation. In conclusion, the longitude by chronometer method represents a significant advancement in the field of navigation. It provided sailors with a reliable means to determine their position at sea, ultimately transforming maritime travel and commerce. The legacy of this technique continues to influence modern navigation systems, reminding us of the importance of precision and innovation in exploring the vast oceans of our planet. As we look to the future, the principles established by the longitude by chronometer will undoubtedly remain relevant in our quest for exploration and understanding of the world around us.

在海上确定自己位置的概念一直是航海中的关键方面。在几个世纪的发展过程中，称为经度通过计时器的方法被证明是最重要的。这种方法在18世纪彻底改变了海洋导航，使水手能够准确计算他们在地球上的东西方位置。在这种技术出现之前，水手依赖于推算和天文导航，这往往不够准确，可能导致灾难性的后果。

“经度通过计时器”方法涉及使用一种精确的计时设备，称为计时器，以确定当地时间与格林威治标准时间（GMT）之间的差异。通过知道固定参考点（格林威治）的确切时间，并将其与通过太阳的位置确定的当地时间进行比较，导航员可以计算出他们的经度。每小时的时间差相当于15度的经度。因此，如果一艘船的计时器显示它比GMT早2小时，导航员就会知道这艘船位于格林威治以西30度的地方。

海洋计时器的引入主要归功于约翰·哈里森，一位英国木匠和钟表匠。他对可靠计时设备的不懈追求 culminated in the creation of H4, a highly accurate marine chronometer. In 1761, the British government offered a reward for a solution to the problem of longitude, and Harrison’s invention proved to be the key. The success of the longitude by chronometer method not only enhanced maritime safety but also facilitated global trade and exploration.

然而，这种技术的实施并非没有挑战。早期的计时器价格昂贵，需要仔细维护。许多水手缺乏有效使用这些设备的培训，导致导航错误。此外，计时器的准确性可能受到温度变化和船只运动等因素的影响。尽管面临这些挑战，经度通过计时器的方法得到了广泛采用，并标志着航海历史的一个转折点。

总之，经度通过计时器方法代表了导航领域的一项重大进展。它为水手提供了一种可靠的方式来确定他们在海上的位置，最终改变了海洋旅行和商业。这种技术的遗产继续影响现代导航系统，提醒我们在探索我们星球的广阔海洋时，精确和创新的重要性。展望未来，由经度通过计时器建立的原则无疑将在我们对周围世界的探索和理解中保持相关性。