double sextant

简明释义

双测量六分仪

英英释义

例句

1.The navigator used a double sextant to accurately measure the angles of celestial bodies.

导航员使用了一个双六分仪来准确测量天体的角度。

2.In sailing competitions, a double sextant can provide more reliable readings than a single one.

在航海比赛中，双六分仪比单一仪器提供更可靠的读数。

3.To improve navigation accuracy, the team decided to invest in a double sextant.

为了提高导航精度，团队决定投资购买一个双六分仪。

4.Using a double sextant allows for cross-checking measurements during long voyages.

使用双六分仪可以在长途航行中交叉检查测量数据。

5.The double sextant was essential for the expedition team to chart their course across the ocean.

对于探险队来说，双六分仪是绘制他们穿越海洋航线的必需品。

作文

In the world of navigation and astronomy, precision is paramount. One of the most fascinating instruments that exemplifies this principle is the double sextant. The double sextant (双六分仪) is an advanced version of the traditional sextant, which has been used for centuries to measure the angle between two visible objects, typically celestial bodies and the horizon. This instrument allows navigators to determine their position at sea with remarkable accuracy, making it an essential tool for sailors and explorers alike.The design of the double sextant incorporates two arcs instead of one, enabling the user to take measurements from two different angles simultaneously. This feature not only enhances the accuracy of readings but also reduces the time required to obtain them. By having two scales, navigators can compare readings directly, which is particularly useful in conditions where visibility may be compromised or when precise measurements are critical.Historically, the development of the double sextant marked a significant advancement in maritime navigation. Before its invention, navigators relied solely on the single sextant, which, while effective, had limitations that could lead to errors in positioning. The introduction of the double sextant addressed many of these issues, allowing for more reliable navigation over long distances. This was especially important during the Age of Exploration, when sailors ventured into uncharted waters and needed accurate tools to chart their courses.The use of the double sextant is not limited to maritime applications. It is also widely utilized in various fields such as surveying, astronomy, and geodesy. In surveying, for instance, the double sextant can help land surveyors measure land boundaries and elevations with high precision. Similarly, astronomers use it to track celestial movements, contributing to our understanding of the universe.One of the key advantages of the double sextant is its ability to provide simultaneous readings, which can be crucial in dynamic environments. For example, when navigating through turbulent waters, a sailor may need to adjust their course quickly based on changing conditions. The double sextant allows for rapid adjustments and accurate readings, enabling sailors to respond effectively to the challenges they face at sea.Moreover, the double sextant is a testament to human ingenuity and the quest for knowledge. Its evolution reflects our desire to explore and understand the world around us. As technology continues to advance, modern navigational tools have emerged, such as GPS and digital compasses, but the double sextant remains a symbol of traditional navigation techniques that laid the groundwork for contemporary practices.In conclusion, the double sextant (双六分仪) is a remarkable instrument that has played a vital role in the history of navigation and astronomy. Its ability to provide accurate and simultaneous measurements has made it an invaluable tool for sailors, surveyors, and astronomers alike. As we continue to explore new frontiers, both on Earth and beyond, the legacy of the double sextant serves as a reminder of the importance of precision and innovation in our quest for understanding.