ship apparent time

简明释义

地方视时

英英释义

例句

1.The ship apparent time helps in synchronizing operations on board.

船只表观时间有助于协调船上的操作。

2.Adjustments were made to the logbook to reflect the ship apparent time changes.

对航海日志进行了调整，以反映船只表观时间的变化。

3.The crew used the ship apparent time to calculate their position at sea.

船员们使用船只表观时间来计算他们在海上的位置。

4.The captain adjusted the navigation instruments to align with the ship apparent time.

船长调整了导航仪器以与船只表观时间对齐。

5.Understanding ship apparent time is crucial for accurate celestial navigation.

理解船只表观时间对于准确的天文导航至关重要。

作文

In the world of navigation and maritime operations, understanding time is crucial. One important concept that sailors and navigators often refer to is ship apparent time, which is essentially the local time observed on a ship based on its current position and the angle of the sun in relation to the horizon. This measurement is vital for various navigational tasks, including determining the ship's longitude and coordinating activities on board. The term ship apparent time can be broken down into two parts: 'ship' and 'apparent time'. The 'ship' aspect refers to the vessel itself, while 'apparent time' indicates the time that is observed rather than the standard or mean time that one might find on land. This distinction is significant because the time experienced on a ship can vary greatly depending on its location on the ocean and the time of year.To understand ship apparent time better, it is essential to consider how sailors traditionally determined time at sea. Before the advent of modern technology, mariners relied heavily on celestial navigation, which involved observing the positions of celestial bodies like the sun and stars. By using sextants and chronometers, they could calculate their position and the time of day. Ship apparent time was derived from these observations, as it was the time indicated by the sun’s position in the sky at a specific longitude.One of the key reasons why ship apparent time is important is its role in determining longitude. The Earth rotates 360 degrees in approximately 24 hours, meaning it rotates about 15 degrees every hour. By knowing the local noon (when the sun is highest in the sky) and comparing it with Greenwich Mean Time (GMT), navigators can ascertain their west-east position on the globe. This method highlights the significance of ship apparent time in practical navigation.Moreover, ship apparent time also plays a crucial role in the synchronization of shipboard activities. Crew members need to coordinate tasks such as meal times, watch changes, and other operations, all of which rely on accurate timekeeping. When ships are at sea, especially in remote areas, having a reliable measure of time can mean the difference between smooth sailing and chaotic operations.In addition to its navigational importance, ship apparent time has historical significance as well. It reflects the evolution of maritime practices and technologies over centuries. As navigational tools advanced, the methods for calculating ship apparent time became more precise, allowing for safer and more efficient voyages. Today, while many vessels use GPS and electronic systems to determine their position and time, understanding ship apparent time remains an essential skill for mariners, especially in situations where electronic devices may fail.In conclusion, ship apparent time is a fundamental concept in maritime navigation that encompasses the local time observed on a ship based on its geographical location. Its significance lies not only in navigation but also in the coordination of ship operations and the historical context of maritime practices. As we continue to advance technologically, the principles behind ship apparent time serve as a reminder of the rich heritage of seafaring and the importance of understanding our environment, even in the age of automation.

在航海和海洋作业的世界中，理解时间至关重要。水手和导航员常常提到的一个重要概念是船舶表观时间，它本质上是指基于船舶当前位置和太阳相对于地平线的角度观察到的地方时间。这一测量对于各种导航任务至关重要，包括确定船舶的经度和协调船上的活动。术语船舶表观时间可以分为两个部分：'船舶'和'表观时间'。'船舶'部分指的是船只本身，而'表观时间'则表示观察到的时间，而不是在陆地上找到的标准或平均时间。这一区别非常重要，因为船舶所经历的时间可能会根据其在海洋上的位置和季节的不同而大相径庭。为了更好地理解船舶表观时间，必须考虑水手们如何在海上传统上确定时间。在现代技术出现之前，海员们在很大程度上依赖天文导航，这涉及观察太阳和星星等天体的位置。通过使用六分仪和航海时钟，他们可以计算出自己的位置和一天中的时间。船舶表观时间是通过这些观察得出的，因为这是在特定经度下，太阳在天空中的位置所指示的时间。船舶表观时间的重要性之一在于它在确定经度中的作用。地球大约在24小时内自转360度，这意味着每小时自转约15度。通过了解当地正午（太阳在空中最高的时候）并与格林威治标准时间（GMT）进行比较，导航员可以确定他们在地球上的东西位置。这种方法突显了船舶表观时间在实际导航中的重要性。此外，船舶表观时间在船上活动的同步中也发挥着至关重要的作用。船员需要协调诸如用餐时间、更换值班和其他操作等任务，而所有这些都依赖于准确的时间记录。当船只在海上航行时，特别是在偏远地区，拥有可靠的时间测量可以意味着顺利航行与混乱操作之间的区别。除了导航的重要性外，船舶表观时间也具有历史意义。它反映了几个世纪以来海事实践和技术的发展。随着导航工具的进步，计算船舶表观时间的方法变得更加精确，从而实现了更安全、更高效的航行。今天，尽管许多船只使用GPS和电子系统来确定其位置和时间，但理解船舶表观时间仍然是海员们的一项基本技能，尤其是在电子设备可能失效的情况下。总之，船舶表观时间是海洋导航中的一个基本概念，它涵盖了在船舶上观察到的基于地理位置的地方时间。它的重要性不仅体现在导航中，还体现在船舶操作的协调和海事实践的历史背景中。随着我们技术的不断进步，船舶表观时间背后的原则提醒我们，即使在自动化时代，理解我们的环境也是非常重要的。