sextant error

简明释义

六分仪误差

英英释义

例句

1.During the sailing competition, the team lost valuable time due to a significant sextant error.

在航海比赛中，团队由于严重的六分仪误差而失去了宝贵的时间。

2.Accurate navigation requires understanding how to minimize sextant error during celestial observations.

准确的导航需要理解如何在天文观测中最小化六分仪误差。

3.To improve their skills, the crew practiced correcting sextant error during their training exercises.

为了提高技能，船员们在训练演习中练习纠正六分仪误差。

4.The captain explained that a sextant error can lead to incorrect positioning at sea.

船长解释说，六分仪误差可能导致海上的错误定位。

5.The navigator adjusted his calculations after realizing the sextant error in his measurements.

导航员在意识到他的测量中存在六分仪误差后，调整了他的计算。

作文

Navigating the vast oceans has always posed a challenge for sailors and explorers alike. One of the essential tools used in celestial navigation is the sextant, an instrument that measures the angle between a celestial body and the horizon. However, like any tool, it is subject to imperfections and inaccuracies, leading to what is known as sextant error. This term refers to the discrepancies that arise during the measurement process, which can result from various factors such as human error, instrument calibration, and environmental conditions.The concept of sextant error is crucial for understanding how navigators determine their position at sea. When using a sextant, the navigator sights a star or the sun and measures its angle above the horizon. This angle, known as the altitude, is then used in conjunction with time and other data to calculate the navigator's latitude and longitude. However, if the sextant is not properly calibrated or if the observer makes a mistake in reading the angle, the resulting position will be inaccurate.There are several types of sextant error that navigators must be aware of. One common source of error is parallax, which occurs when the observer’s eye is not aligned perfectly with the instrument’s index. This misalignment can lead to incorrect readings. Another source of error is instrumental error, which can arise from the physical properties of the sextant itself, such as imperfections in the mirrors or the scale. Additionally, environmental factors such as atmospheric refraction can also affect the accuracy of the measurements taken with a sextant.Understanding sextant error is not just a matter of theoretical knowledge; it has practical implications for anyone involved in maritime navigation. For instance, during long voyages, even a small error in measurement can accumulate over time, leading to significant deviations from the intended course. Sailors must therefore be diligent in checking and calibrating their instruments regularly to minimize these errors.Moreover, the advent of modern technology has provided navigators with advanced tools such as GPS, which have largely replaced traditional methods of navigation. However, the principles behind sextant error remain relevant. Even with modern technology, understanding the limitations and potential errors of navigation systems is vital for ensuring safe passage at sea. For example, GPS signals can be affected by atmospheric conditions, satellite positioning, and other factors that can lead to inaccuracies similar to those experienced with a sextant.In conclusion, the term sextant error encapsulates the various inaccuracies that can occur in celestial navigation, highlighting the importance of precision and attention to detail in maritime practices. While modern technology has transformed the way we navigate, the fundamental principles of navigation, including the awareness of potential errors, continue to be essential for safe and effective seafaring. As we explore the seas, understanding tools like the sextant and the errors associated with them not only pays homage to the rich history of navigation but also reinforces the need for careful practice in our journeys across the waters.

在广阔的海洋中航行一直是水手和探险者面临的挑战之一。天文导航中使用的一种基本工具是六分仪，这是一种测量天体与地平线之间角度的仪器。然而，像任何工具一样，它也会受到不完美和不准确性的影响，导致所谓的六分仪误差。这个术语指的是在测量过程中出现的差异，这可能是由于多种因素造成的，例如人为错误、仪器校准以及环境条件。理解六分仪误差的概念对于理解导航员如何确定他们在海上的位置至关重要。当使用六分仪时，导航员瞄准一颗星星或太阳，并测量其在地平线上的角度。这个角度称为高度，然后与时间和其他数据结合使用，以计算导航员的纬度和经度。然而，如果六分仪没有正确校准，或者观察者在读取角度时犯了错误，结果的位置将不准确。有几种类型的六分仪误差，导航员必须了解。一种常见的误差来源是视差，当观察者的眼睛没有与仪器的指示器完美对齐时，就会发生这种情况。这种错位会导致读取不正确。另一个误差来源是仪器误差，这可能源于六分仪本身的物理特性，例如镜子或刻度的缺陷。此外，环境因素如大气折射也会影响用六分仪进行的测量的准确性。理解六分仪误差不仅仅是理论知识的问题；它对任何参与海上导航的人都有实际意义。例如，在长途航行中，即使是小的测量误差也会随着时间的推移积累，导致与预定航线的显著偏离。因此，水手必须定期检查和校准他们的仪器，以尽量减少这些误差。此外，现代技术的出现为导航员提供了先进的工具，如GPS，这在很大程度上取代了传统的导航方法。然而，关于六分仪误差的原则依然相关。即使使用现代技术，理解导航系统的局限性和潜在错误对于确保安全通过海域至关重要。例如，GPS信号可能受到大气条件、卫星定位和其他因素的影响，这可能导致类似于六分仪所经历的不准确性。总之，六分仪误差这一术语概括了天文导航中可能发生的各种不准确性，突显了在海事实践中精确性和细节关注的重要性。虽然现代技术改变了我们的导航方式，但导航的基本原则，包括对潜在错误的认识，仍然是安全有效航行的关键。在探索海洋时，理解像六分仪这样的工具及其相关的误差，不仅向导航的丰富历史致敬，也强调了我们在水上旅程中仔细实践的必要性。