sextant mirror

简明释义

六分仪镜

英英释义

例句

1.The sextant mirror is crucial for celestial navigation.

六分仪镜子对于天文导航至关重要。

2.A damaged sextant mirror can lead to navigational errors.

损坏的六分仪镜子可能导致导航错误。

3.Using the sextant mirror, he was able to determine his position at sea.

通过使用六分仪镜子，他能够确定自己在海上的位置。

4.The navigator adjusted the sextant mirror to get a precise reading of the stars.

导航员调整了六分仪镜子以精确读取星星。

5.She polished the sextant mirror before her long voyage.

她在长途航行前擦亮了六分仪镜子。

作文

The sextant mirror is an essential component of a sextant, which is an instrument used for navigation. It allows sailors and navigators to measure the angle between two visible objects, typically the horizon and a celestial body like the sun or a star. The usage of the sextant mirror is crucial in determining one's latitude and longitude at sea, making it a vital tool for maritime navigation. Historically, before the advent of modern GPS technology, the sextant was one of the most reliable instruments available to navigators. Understanding how the sextant mirror works requires some knowledge of basic optics. The mirror reflects the image of the celestial body down into the telescope, allowing the navigator to see both the horizon and the star simultaneously. This dual view is essential for accurate measurements. When the navigator aligns the reflected image of the celestial body with the horizon using the micrometer screw on the sextant, they can read the angle off the scale. This angle is then used in conjunction with tables to determine their position on the globe.The design of the sextant mirror itself is quite fascinating. It is typically made from highly polished glass or metal, ensuring that it reflects light effectively. The size and angle of the mirror can significantly affect the accuracy of the measurements taken. A well-maintained sextant mirror can provide reliable readings even in challenging weather conditions, which is why regular maintenance and calibration are important for navigators who rely on this instrument.In addition to its practical applications, the sextant mirror also holds historical significance. Many famous explorers, such as Captain James Cook and Ferdinand Magellan, relied on the sextant for their voyages across uncharted waters. Their successful navigation allowed for discoveries of new lands and trade routes, shaping the course of history. Today, while technology has advanced, the principles behind the sextant mirror remain relevant in understanding navigation techniques and the evolution of maritime exploration.In modern times, the sextant and its sextant mirror are still taught in maritime academies as part of navigation courses. This is because understanding traditional navigation methods is invaluable, especially in situations where electronic devices fail. Navigators equipped with knowledge about the sextant mirror can still find their way, relying on the stars and the horizon rather than technology. In conclusion, the sextant mirror is more than just a piece of glass; it represents a bridge between the past and present in the field of navigation. Its role in maritime history cannot be overstated, and its continued relevance in training new navigators ensures that the art of celestial navigation remains alive. Whether one is sailing across vast oceans or studying the history of exploration, the sextant mirror serves as a reminder of the ingenuity and perseverance of those who came before us.

六分仪镜子是六分仪的一个重要组成部分，六分仪是一种用于导航的仪器。它允许水手和导航员测量两个可见物体之间的角度，通常是地平线和天体（如太阳或星星）。使用六分仪镜子对于确定在海上的纬度和经度至关重要，使其成为海洋导航的重要工具。在现代GPS技术出现之前，六分仪是航海者最可靠的仪器之一。理解六分仪镜子的工作原理需要一些基本光学知识。镜子将天体的图像反射到望远镜中，使导航员能够同时看到地平线和星星。这种双重视图对准确测量至关重要。当导航员使用六分仪上的微米螺丝将反射的天体图像与地平线对齐时，他们可以从刻度上读取角度。然后，这个角度与表格结合使用，以确定他们在地球上的位置。六分仪镜子本身的设计非常迷人。它通常由高度抛光的玻璃或金属制成，确保有效反射光线。镜子的大小和角度会显著影响测量的准确性。维护良好的六分仪镜子即使在恶劣天气条件下也能提供可靠的读数，这就是为什么定期维护和校准对于依赖该仪器的导航员至关重要。除了实用应用外，六分仪镜子还具有历史意义。许多著名的探险家，如詹姆斯·库克船长和费迪南德·麦哲伦，都依靠六分仪进行他们穿越未知水域的航行。他们的成功导航使新土地和贸易路线的发现成为可能，塑造了历史的进程。今天，虽然技术已经进步，但六分仪镜子背后的原理在理解导航技巧和海洋探索的发展中仍然具有相关性。在现代，六分仪及其六分仪镜子仍在海事学院的导航课程中教授。这是因为理解传统导航方法是非常宝贵的，尤其是在电子设备失效的情况下。掌握六分仪镜子知识的导航员仍然可以找到自己的路，依靠星星和地平线，而不是技术。总之，六分仪镜子不仅仅是一块玻璃；它代表了导航领域过去与现在之间的桥梁。它在海洋历史中的作用不可低估，其在培训新导航员中的持续相关性确保了天文导航艺术的延续。无论是跨越广阔海洋航行，还是研究探索历史，六分仪镜子都提醒着我们那些曾经先辈的创造力和毅力。