marine sextant

简明释义

航用六分仪

英英释义

例句

1.The captain used a marine sextant to determine the ship's position at sea.

船长使用海洋六分仪来确定船只在海上的位置。

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

学习如何使用海洋六分仪对于传统导航至关重要。

3.During the voyage, the crew relied on the marine sextant for accurate readings.

在航行过程中，船员依赖海洋六分仪进行准确的测量。

4.A marine sextant can help sailors avoid dangerous waters by providing precise coordinates.

一个海洋六分仪可以通过提供精确的坐标帮助水手避开危险水域。

5.The old sailor taught the young apprentice how to use a marine sextant effectively.

老水手教年轻学徒如何有效地使用海洋六分仪。

作文

The history of navigation is a fascinating tale of human ingenuity and the quest for exploration. Among the many tools that have been developed over the centuries, the marine sextant stands out as a pivotal instrument in maritime navigation. The marine sextant is an angular measurement device used to determine the altitude of celestial bodies, which is crucial for establishing one's position at sea. This tool has transformed the way sailors and navigators chart their courses across vast oceans.The origins of the marine sextant can be traced back to the 18th century when it was developed as an improvement on earlier instruments like the quadrant and the astrolabe. With its ability to measure angles with greater precision, the marine sextant allowed navigators to calculate their latitude and longitude more accurately than ever before. This advancement was particularly significant during the Age of Exploration when European powers were expanding their empires and seeking new trade routes.One of the most remarkable features of the marine sextant is its simplicity and effectiveness. It consists of a graduated arc, a telescope, and a movable arm called the index arm. By aligning the image of a celestial body—such as the sun or a star—with the horizon, navigators could take precise measurements. These measurements would then be used in conjunction with nautical charts and tables to determine their exact location on the globe.The importance of the marine sextant cannot be overstated. Before the advent of modern GPS technology, this instrument was indispensable for long voyages. Sailors relied on it not only for navigation but also for safety. Accurate positioning was vital to avoid dangerous waters and to ensure that ships reached their destinations without incident. The marine sextant thus played a crucial role in maritime trade and exploration, contributing to the economic growth of nations and the spread of cultures around the world.Despite the rise of electronic navigation systems, the marine sextant remains relevant today. Many sailors still carry it as a backup to electronic devices, as it does not rely on batteries or satellites. In fact, learning to use a marine sextant is often part of training for aspiring navigators, as it teaches them the fundamental principles of celestial navigation. This knowledge is not only valuable for practical purposes but also enriches their understanding of the history and art of navigation.In conclusion, the marine sextant is more than just a tool; it is a symbol of humanity's desire to explore and understand the world. Its development marked a significant milestone in the history of navigation, enabling explorers to traverse the seas with confidence and accuracy. Today, while technology has advanced, the marine sextant continues to be an important part of maritime heritage, reminding us of the skill and determination that have driven human exploration for centuries.

航海的历史是人类创造力和探索欲望的迷人故事。在几个世纪中发展起来的众多工具中，海用六分仪作为海洋导航中一个关键的仪器脱颖而出。海用六分仪是一种用于测量天体高度的角度测量设备，这对于确定在海上的位置至关重要。这个工具改变了水手和导航员在辽阔海洋上绘制航线的方式。海用六分仪的起源可以追溯到18世纪，当时它被开发出来以改善早期仪器如象限仪和天文仪。凭借其更高的角度测量精度，海用六分仪使导航员能够比以往更准确地计算他们的纬度和经度。这一进步在探索时代尤为重要，当时欧洲列强正在扩展其帝国并寻找新的贸易路线。海用六分仪最显著的特点之一是其简单性和有效性。它由一个刻度弧、一个望远镜和一个可移动的臂（称为指针臂）组成。通过将天体（如太阳或星星）的图像与地平线对齐，导航员可以进行精确测量。这些测量结果随后将与海图和表格结合使用，以确定他们在地球上的确切位置。海用六分仪的重要性不可低估。在现代GPS技术出现之前，这种仪器对长途航行至关重要。水手不仅依赖它进行导航，还依赖它保障安全。准确定位对于避免危险水域和确保船只顺利到达目的地至关重要。因此，海用六分仪在海洋贸易和探索中发挥了关键作用，促进了国家的经济增长和文化的传播。尽管电子导航系统的兴起，海用六分仪今天仍然具有相关性。许多水手仍将其作为电子设备的备份，因为它不依赖于电池或卫星。事实上，学习使用海用六分仪通常是未来导航员培训的一部分，因为它教会他们天文导航的基本原理。这种知识不仅对实际目的有价值，还丰富了他们对导航历史和艺术的理解。总之，海用六分仪不仅仅是一种工具；它是人类渴望探索和理解世界的象征。它的发展标志着航海历史上的一个重要里程碑，使探险者能够自信而准确地穿越海洋。今天，尽管技术已经进步，海用六分仪仍然是海洋遗产的重要组成部分，提醒我们推动人类探索的技能和决心已经持续了几个世纪。