sextant altitude

简明释义

六分仪高度六分仪高度

英英释义

例句

1.The sextant altitude measurement was crucial for the sailing expedition.

对航海探险来说，六分仪高度的测量至关重要。

2.The captain explained how to calculate sextant altitude during the training session.

船长在培训课程中解释了如何计算六分仪高度。

3.Using the sextant altitude, the crew was able to plot their course accurately.

通过使用六分仪高度，船员能够准确地绘制航线。

4.The navigator calculated the sextant altitude to determine their position at sea.

导航员计算了六分仪高度以确定他们在海上的位置。

5.He took a reading of the sextant altitude just before sunset.

他在日落前刚刚测量了六分仪高度。

作文

The art of navigation has evolved significantly over the centuries, yet some traditional tools remain invaluable to seafarers and aviators alike. One such tool is the sextant, an instrument that allows navigators to measure the angle between an astronomical object and the horizon. This measurement is known as sextant altitude, which plays a crucial role in determining a vessel's or aircraft's position at sea or in the sky. Understanding sextant altitude is essential for anyone interested in celestial navigation, as it provides the foundation for calculating latitude and longitude based on celestial bodies like the sun, moon, stars, and planets.To grasp the significance of sextant altitude, one must first appreciate how a sextant operates. The instrument consists of a graduated arc, a movable arm called an index arm, and a telescope. When using a sextant, the navigator aligns the image of the celestial body with the horizon by adjusting the index arm. The angle measured, or sextant altitude, is recorded and later used in calculations to determine the observer's position.The importance of accurate sextant altitude cannot be overstated. In the past, before the advent of modern GPS technology, sailors relied heavily on this measurement to navigate vast oceans. For example, during the Age of Exploration, explorers like Captain James Cook used sextants to chart unknown territories and ensure safe passage across treacherous waters. An error in measuring sextant altitude could result in significant navigational mistakes, leading to shipwrecks or getting lost at sea.In addition to maritime navigation, sextant altitude is also vital in aviation. Pilots use sextants to determine their position during long flights, particularly over oceans where landmarks are scarce. By measuring the sextant altitude of celestial bodies, they can cross-reference their position with nautical charts and ensure they stay on course. This method is especially useful in situations where electronic navigation systems fail or are unreliable.Moreover, learning about sextant altitude offers insights into the principles of geometry and trigonometry. The calculations involved in determining a ship's or aircraft's position require a solid understanding of angles and distances. Students studying navigation often find that mastering sextant altitude enhances their mathematical skills, as they apply these concepts in practical scenarios.In conclusion, the concept of sextant altitude is a cornerstone of celestial navigation, intertwining history, mathematics, and exploration. While technology has advanced and provided us with sophisticated tools for navigation, the fundamental principles behind sextant altitude remain relevant. For those who wish to delve into the world of navigation, understanding this measurement is not just beneficial; it is essential. As we continue to explore the skies and seas, the legacy of the sextant and its sextant altitude will undoubtedly endure, reminding us of the skill and knowledge required to traverse our planet with precision and confidence.

导航艺术在几个世纪里经历了显著的演变，但一些传统工具仍然对海员和飞行员至关重要。其中一个工具是六分仪，这是一种允许导航员测量天体与地平线之间角度的仪器。这个测量被称为六分仪高度，它在确定船只或飞机在海洋或天空中的位置中发挥着至关重要的作用。理解六分仪高度对于任何对天文导航感兴趣的人来说都是必不可少的，因为它提供了基于太阳、月亮、星星和行星等天体计算纬度和经度的基础。要理解六分仪高度的重要性，首先必须欣赏六分仪的工作原理。该仪器由一个刻度弧、一个可移动臂（称为指针臂）和一个望远镜组成。在使用六分仪时，导航员通过调整指针臂将天体的图像与地平线对齐。测量的角度，即六分仪高度，被记录下来，随后用于计算观察者的位置。准确的六分仪高度的重要性不容小觑。在现代GPS技术出现之前，水手们在广阔的海洋中严重依赖这一测量。例如，在探索时代，像詹姆斯·库克船长这样的探险家使用六分仪来绘制未知领土，并确保安全穿越危险水域。测量六分仪高度的错误可能导致重大的导航失误，导致船只失事或迷失在海上。除了海洋导航，六分仪高度在航空中也至关重要。飞行员使用六分仪来确定他们在长途飞行中的位置，特别是在地标稀少的海洋上。通过测量天体的六分仪高度，他们可以将自己的位置与航海图进行交叉参考，以确保他们保持在航线上。这种方法在电子导航系统失效或不可靠的情况下尤其有用。此外，学习六分仪高度可以提供几何和三角学原理的见解。确定船只或飞机位置所涉及的计算需要对角度和距离有扎实的理解。学习导航的学生通常发现，掌握六分仪高度能够增强他们的数学技能，因为他们在实际场景中应用这些概念。总之，六分仪高度的概念是天文导航的基石，交织着历史、数学和探索。虽然技术已经进步，为我们提供了复杂的导航工具，但六分仪高度背后的基本原理仍然具有相关性。对于那些希望深入了解导航的人来说，理解这一测量不仅是有益的；而且是必不可少的。当我们继续探索天空和海洋时，六分仪及其六分仪高度的遗产无疑会持续存在，提醒我们以精确和信心穿越我们星球所需的技能和知识。