arc of sextant

简明释义

六分仪刻度弧

英英释义

例句

1.The arc of sextant is a vital component for celestial navigation, allowing sailors to find their way using stars.

对于天文导航来说，六分仪的弧度是一个重要组成部分，使水手能够利用星星找到方向。

2.To ensure accurate readings, it is essential to calibrate the arc of sextant before starting the voyage.

为了确保读数准确，在开始航行之前必须校准六分仪的弧度。

3.During the sailing class, students practiced aligning the sun with the arc of sextant to calculate their latitude.

在航海课程中，学生们练习将太阳与六分仪的弧度对齐以计算他们的纬度。

4.The navigator carefully measured the angle using the arc of sextant, which is crucial for determining their position at sea.

导航员小心翼翼地使用六分仪的弧度来测量角度，这对于确定他们在海上的位置至关重要。

5.He adjusted the arc of sextant to account for the ship's tilt in rough seas.

他调整了六分仪的弧度以考虑到船只在波涛汹涌的海面上的倾斜。

作文

The history of navigation is a fascinating tale that intertwines human curiosity, scientific advancement, and the quest for exploration. One of the most important tools in this journey has been the sextant, an instrument that has allowed navigators to determine their position at sea with remarkable accuracy. At the heart of the sextant's functionality lies the arc of sextant, which refers to the graduated scale on the instrument that measures angular distances. This component is crucial for celestial navigation, as it helps sailors measure the angle between a celestial body and the horizon. To understand the significance of the arc of sextant, we must first appreciate the context in which it is used. Before the advent of modern navigation technologies, sailors relied heavily on the stars to guide their journeys. The ability to accurately measure angles was essential for determining latitude and longitude, and the sextant provided a reliable means to achieve this. By measuring the altitude of the sun or stars above the horizon using the arc of sextant, navigators could calculate their position on the Earth's surface. The design of the sextant is both elegant and functional. The arc of sextant is typically made of brass or other durable materials, and it is marked with degrees to facilitate precise readings. The instrument consists of a frame, a telescope, and a movable arm known as the index arm. When a navigator sights a celestial body through the telescope, they can adjust the index arm until the body is aligned with the horizon. The angle displayed on the arc of sextant is then recorded, allowing the navigator to use mathematical calculations to determine their location. Navigating the open seas with a sextant requires skill and practice. Sailors must be familiar with the movements of celestial bodies and understand how to interpret the readings from the arc of sextant. They also need to account for factors such as atmospheric refraction, which can affect the accuracy of their measurements. Despite these challenges, the sextant has proven to be an invaluable tool for generations of mariners. In today's world, where GPS technology dominates navigation, the sextant may seem like an archaic relic. However, its principles are still taught in nautical schools, and many sailors continue to carry a sextant as a backup navigation tool. The arc of sextant serves as a reminder of the ingenuity of our ancestors and their relentless pursuit of knowledge. It embodies the spirit of exploration and the importance of understanding our place in the universe. In conclusion, the arc of sextant is more than just a component of a navigational tool; it represents a significant leap in human understanding of navigation and astronomy. The sextant has played a critical role in enabling explorers to traverse vast oceans, connecting distant lands and cultures. As we look toward the future of navigation, it is essential to remember the contributions of instruments like the sextant and the profound impact they have had on our ability to explore the world. The arc of sextant will forever remain a symbol of humanity's quest for discovery and adventure.

航海史是一段迷人的故事，交织着人类的好奇心、科学进步和探索的追求。在这段旅程中，最重要的工具之一就是六分仪，这一仪器使导航员能够以惊人的精确度确定他们在海上的位置。六分仪功能的核心在于六分仪的弧，它指的是仪器上测量角度的刻度。这一组件对于天文导航至关重要，因为它帮助水手测量天体与地平线之间的角度。要理解六分仪的弧的重要性，我们首先必须欣赏它使用的背景。在现代导航技术出现之前，水手们主要依靠星星来引导他们的旅程。准确测量角度的能力对于确定纬度和经度至关重要，而六分仪提供了一种可靠的方法来实现这一目标。通过使用六分仪的弧测量太阳或星星在地平线上的高度，导航员可以计算他们在地球表面的位置。六分仪的设计既优雅又实用。六分仪的弧通常由黄铜或其他耐用材料制成，并标有度数以便于精确读数。该仪器由一个框架、一个望远镜和一个称为指示臂的可移动臂组成。当导航员通过望远镜瞄准天体时，他们可以调整指示臂，直到天体与地平线对齐。然后显示在六分仪的弧上的角度被记录下来，允许导航员使用数学计算来确定他们的位置。使用六分仪在开阔海域进行导航需要技巧和实践。水手必须熟悉天体的运动，并理解如何解读来自六分仪的弧的读数。他们还需要考虑大气折射等因素，这可能会影响测量的准确性。尽管面临这些挑战，六分仪已被几代水手证明是无价的工具。在今天这个GPS技术主导导航的世界里，六分仪可能看起来像是一个过时的遗物。然而，它的原理仍然在航海学校教授，许多水手继续携带六分仪作为备用导航工具。六分仪的弧提醒我们祖先的聪明才智和他们对知识的无尽追求。它体现了探索的精神和理解我们在宇宙中位置的重要性。总之，六分仪的弧不仅仅是导航工具的一个组件；它代表了人类在导航和天文学理解上的重大飞跃。六分仪在使探险家能够横渡广阔的海洋方面发挥了关键作用，连接了遥远的土地和文化。当我们展望未来的导航时，记住像六分仪这样的仪器所做出的贡献以及它们对我们探索世界能力的深远影响是至关重要的。六分仪的弧将永远成为人类探索和冒险追求的象征。