marine sextant

简明释义

航海用六分仪

英英释义

例句

1.Learning how to read a marine sextant is essential for traditional navigation.

学习如何使用海用六分仪对于传统导航至关重要。

2.A well-calibrated marine sextant can provide accurate measurements of celestial bodies.

经过良好校准的海用六分仪可以提供天体的准确测量。

3.The advent of GPS has made the marine sextant less common among recreational sailors.

GPS的出现使得海用六分仪在休闲水手中变得不那么常见。

4.During the voyage, the captain checked the stars with the marine sextant every night.

在航行期间，船长每晚都用海用六分仪观察星星。

5.The sailor used a marine sextant to determine their position at sea.

水手使用海用六分仪来确定他们在海上的位置。

作文

The history of navigation is a fascinating journey that highlights human ingenuity and the quest for exploration. One of the most significant tools in this journey is the marine sextant, a device that has played a crucial role in maritime navigation for centuries. The marine sextant is an instrument used to measure the angle between a celestial object and the horizon, allowing sailors to determine their latitude and longitude at sea. This capability was vital for safe and accurate navigation during long voyages across uncharted waters.The invention of the marine sextant can be traced back to the 18th century, building upon earlier navigational tools such as the astrolabe and quadrant. Unlike its predecessors, the marine sextant provides greater accuracy and ease of use, making it an indispensable tool for navigators. It consists of a movable arm, called the index arm, which is mounted on a circular frame. By aligning the image of a celestial body with the horizon, sailors can take precise measurements that are essential for plotting their course.Using a marine sextant requires skill and knowledge of celestial navigation. Sailors must be familiar with the positions of stars, planets, and other celestial bodies, as well as the principles of trigonometry to interpret the measurements taken with the device. This knowledge was often acquired through rigorous training and experience at sea. The marine sextant not only serves as a navigational aid but also embodies the spirit of exploration and adventure that has characterized maritime history.In addition to its practical applications, the marine sextant holds a symbolic significance in the realm of navigation. It represents the transition from traditional methods of navigation, which relied heavily on landmarks and coastal features, to more advanced techniques that utilize celestial bodies. This shift allowed explorers to venture further into the open ocean, leading to discoveries of new lands and trade routes.Despite advancements in technology, such as GPS and electronic navigation systems, the marine sextant remains relevant today. Many sailors and navigators still carry a marine sextant as a backup to electronic devices, as it does not rely on batteries or electronic components. Furthermore, understanding how to use a marine sextant fosters a deeper appreciation for the art of navigation and the challenges faced by early sailors.In conclusion, the marine sextant is more than just a navigational tool; it is a testament to human innovation and the enduring spirit of exploration. Its role in the history of navigation cannot be overstated, as it has enabled countless adventurers to traverse the world's oceans safely. As we continue to explore and navigate our world, the marine sextant serves as a reminder of our past and the skills that have shaped our understanding of the seas. Whether used in practice or admired in museums, the marine sextant will always hold a special place in the hearts of those who cherish the art of navigation.

航海史是一段引人入胜的旅程，突显了人类的聪明才智和探索的渴望。在这段旅程中，海用六分仪是一个重要的工具，几个世纪以来在海上导航中发挥了至关重要的作用。海用六分仪是一种用于测量天体与地平线之间角度的仪器，使水手能够在海上确定他们的纬度和经度。这种能力对于在未知水域进行长途航行的安全和准确导航至关重要。海用六分仪的发明可以追溯到18世纪，建立在早期导航工具如星盘和象限的基础上。与其前身不同，海用六分仪提供了更高的精确度和易用性，使其成为导航员不可或缺的工具。它由一个可移动的臂（称为指示臂）和一个圆形框架构成。通过将天体的图像与地平线对齐，水手可以进行精确的测量，这对于绘制航线至关重要。使用海用六分仪需要技能和天文导航的知识。水手必须熟悉星星、行星和其他天体的位置，以及利用三角学原理来解释使用该设备所测得的数值。这些知识通常通过严格的训练和海上的经验获得。海用六分仪不仅作为导航辅助工具，还体现了探索和冒险的精神，这种精神一直贯穿于海洋历史。除了实际应用外，海用六分仪在导航领域还具有象征意义。它代表了从传统的依赖地标和沿海特征的导航方法向更先进技术的转变，这些技术利用天体。这一转变使探险者能够深入开放的海洋，导致新土地和贸易路线的发现。尽管技术有了进步，如全球定位系统（GPS）和电子导航系统，但海用六分仪今天仍然具有相关性。许多水手和导航员仍然携带海用六分仪作为电子设备的备用，因为它不依赖于电池或电子元件。此外，理解如何使用海用六分仪可以加深对导航艺术的欣赏以及早期水手所面临的挑战。总之，海用六分仪不仅仅是一种导航工具；它是人类创新和持久探索精神的见证。它在导航史上的作用不可低估，因为它使无数冒险者能够安全地横渡世界的海洋。当我们继续探索和导航我们的世界时，海用六分仪提醒我们过去的经历和塑造我们对海洋理解的技能。无论是在实践中使用还是在博物馆中欣赏，海用六分仪始终在那些珍视导航艺术的人们心中占有特殊的地位。