ship's mean time

简明释义

地方平时

英英释义

例句

1.The ship's mean time is crucial for coordinating activities during our voyage.

船的平均时间对于协调我们航行中的活动至关重要。

2.To synchronize with the port authority, we need to report our arrival using the ship's mean time.

为了与港口当局同步，我们需要使用船的平均时间报告我们的到达时间。

3.The captain adjusted the navigation based on the ship's mean time to ensure accurate positioning.

船长根据船的平均时间调整航向，以确保定位准确。

4.During the safety drill, the crew was reminded to use the ship's mean time for all communications.

在安全演习中，船员被提醒在所有通讯中使用船的平均时间。

5.The logbook records every event according to the ship's mean time for accuracy.

日志本根据船的平均时间记录每个事件以确保准确性。

作文

Navigating the vast oceans has always been a challenge for sailors and navigators. One of the key concepts that have emerged in maritime navigation is the idea of ship's mean time, which refers to the average time kept by a ship based on its own clock. This concept is crucial for ensuring that a vessel can accurately determine its position at sea and coordinate with other ships and maritime authorities. Understanding the significance of ship's mean time can greatly enhance our appreciation of maritime history and navigation techniques.The importance of ship's mean time can be traced back to the era of sailing ships, when accurate timekeeping was essential for navigation. Sailors relied on celestial navigation, which involves using the positions of stars and planets to determine their location. To do this effectively, they needed to have an accurate time reference. The ship's mean time served as this reference, allowing sailors to calculate their longitude by comparing their local time with the time at a known location, such as Greenwich Mean Time (GMT).In practical terms, ship's mean time is established by the ship's chronometer, a highly precise clock that is often adjusted to GMT. This synchronization ensures that all navigational calculations are based on a consistent time standard. When a ship sets sail, the captain and crew will ensure that the chronometer is set accurately, and from that point onward, they will use the ship's mean time for all navigational purposes.Moreover, the concept of ship's mean time extends beyond mere timekeeping; it encapsulates the relationship between time and navigation. For instance, knowing the ship's mean time allows a navigator to plot a course more accurately, accounting for factors such as currents, wind, and the ship's speed. This is particularly important in situations where timely arrivals are critical, such as in commercial shipping or search and rescue operations.Another aspect worth noting is the technological advancements that have influenced the practice of keeping ship's mean time. With the advent of GPS and modern navigation systems, the reliance on traditional timekeeping methods has diminished. However, understanding the historical context of ship's mean time remains vital for anyone interested in maritime studies or the evolution of navigation.In conclusion, the concept of ship's mean time is not just a technical term; it represents a fundamental aspect of maritime navigation that has evolved over centuries. It highlights the critical role of time in determining a ship's position and ensuring safe passage across the world's oceans. As we continue to advance technologically, it is essential to recognize and respect the traditional methods that laid the groundwork for modern navigation. By appreciating the significance of ship's mean time, we gain insight into the rich history of seafaring and the ongoing challenges faced by those who navigate the seas today.

航行在辽阔的海洋上一直是水手和导航员面临的挑战之一。海洋导航中出现的一个关键概念是船只平均时间，它指的是一艘船根据自己的时钟所保持的平均时间。这个概念对于确保船只能够准确地确定其在海上的位置，并与其他船只和海事当局协调至关重要。理解船只平均时间的重要性可以大大增强我们对海洋历史和导航技术的欣赏。船只平均时间的重要性可以追溯到帆船时代，当时准确的计时对于导航至关重要。水手依赖天文导航，这涉及使用星星和行星的位置来确定他们的位置。为了有效地做到这一点，他们需要有一个准确的时间参考。船只平均时间作为这个参考，使水手能够通过将他们的当地时间与已知位置（如格林威治标准时间（GMT））的时间进行比较来计算他们的经度。在实际操作中，船只平均时间是由船上的计时器建立的，这是一种高度精确的时钟，通常会调整为GMT。这种同步确保所有导航计算都是基于一致的时间标准。当一艘船启航时，船长和船员会确保计时器设置准确，从那时起，他们将使用船只平均时间进行所有导航目的。此外，船只平均时间的概念不仅仅是计时；它还包含了时间与导航之间的关系。例如，知道船只平均时间使导航员能够更准确地绘制航线，考虑到潮流、风和船速等因素。这在及时到达至关重要的情况下尤其重要，例如商业航运或搜救行动。值得注意的另一个方面是影响船只平均时间保持实践的技术进步。随着GPS和现代导航系统的出现，对传统计时方法的依赖有所减少。然而，理解船只平均时间的历史背景对于任何对海洋研究或导航演变感兴趣的人来说仍然至关重要。总之，船只平均时间的概念不仅仅是一个技术术语；它代表了一个基本的海洋导航方面，这一方面经历了几个世纪的发展。它突显了时间在确定船只位置和确保安全通过世界海洋中的关键作用。随着我们在技术上不断进步，认识到并尊重奠定现代导航基础的传统方法是至关重要的。通过欣赏船只平均时间的重要性，我们对丰富的航海历史以及今天那些在海上航行的人们所面临的持续挑战有了更深刻的理解。