depth at chart datum

简明释义

基准面下深度

英英释义

例句

1.The marina's charts showed a depth at chart datum of 5 meters in the docking area.

码头的图表显示停靠区的图表基准深度为5米。

2.Before setting sail, the captain checked the depth at chart datum to avoid running aground.

在起航前，船长检查了图表基准深度以避免搁浅。

3.The survey revealed that the depth at chart datum had changed due to sediment buildup.

调查显示，由于沉积物堆积，图表基准深度发生了变化。

4.The depth at chart datum indicates the minimum water depth at which vessels can safely navigate.

在航行中，图表基准深度表示船只可以安全航行的最低水深。

5.When planning the dredging project, we must consider the depth at chart datum to ensure proper clearance.

在规划疏浚项目时，我们必须考虑图表基准深度以确保适当的净空。

作文

Understanding nautical charts is crucial for safe navigation at sea. One of the key terms that navigators must be familiar with is depth at chart datum. This term refers to the depth of water measured from a reference point known as the chart datum, which is typically the lowest astronomical tide or a standard level used to ensure consistency across various charts. Knowing the depth at chart datum is essential for mariners because it helps them determine whether their vessel can safely navigate through certain waters without running aground.When navigating, sailors rely on charts that provide detailed information about the underwater topography and water depths. The depth at chart datum is often displayed in meters or feet on these charts, allowing navigators to assess the safety of their route. For instance, if a chart indicates a depth of 10 meters at chart datum, this means that at the lowest expected tide, there will still be 10 meters of water above the seabed. However, during high tides, the actual water depth will be significantly greater.It is important to note that the depth at chart datum can vary depending on geographical location and local tidal patterns. Some areas experience significant tidal fluctuations, while others may have minimal changes. Therefore, understanding the local conditions and how they affect the depth at chart datum is vital for safe navigation. Additionally, navigators must also consider other factors such as weather conditions, currents, and potential underwater hazards when planning their routes.In summary, the concept of depth at chart datum plays a fundamental role in maritime navigation. It serves as a critical reference point that helps sailors understand the water depths relative to the seabed, ensuring they can navigate safely and avoid potential dangers. By mastering this term and its implications, mariners can enhance their skills and confidence in managing their vessels in various marine environments. Ultimately, a solid grasp of depth at chart datum contributes to safer and more efficient navigation, making it an indispensable aspect of seamanship.

理解航海图对于安全航行至关重要。水手必须熟悉的一个关键术语是图表基准深度。这个术语指的是从一个称为图表基准的参考点测量的水深，通常是最低天文潮或用于确保各种图表之间一致性的标准水平。了解图表基准深度对于水手来说至关重要，因为它帮助他们确定他们的船只是否可以安全地通过某些水域而不搁浅。在航行时，水手依赖提供水下地形和水深详细信息的图表。图表基准深度通常以米或英尺显示在这些图表上，使导航员能够评估其航线的安全性。例如，如果一张图表在图表基准处显示水深为10米，这意味着在最低预期潮位时，海底上方仍有10米的水。然而，在高潮期间，实际的水深将大大增加。需要注意的是，图表基准深度可能会因地理位置和当地潮汐模式而有所不同。有些地区经历显著的潮汐波动，而其他地区可能变化较小。因此，理解当地条件及其对图表基准深度的影响对于安全航行至关重要。此外，导航员在规划航线时还必须考虑天气条件、潮流和潜在水下危险等其他因素。总之，图表基准深度的概念在海事导航中发挥着基础作用。它作为一个关键参考点，帮助水手理解水深相对于海底的情况，确保他们能够安全航行并避免潜在危险。通过掌握这个术语及其含义，水手可以提高他们的技能和在各种海洋环境中管理船只的信心。最终，坚实掌握图表基准深度有助于更安全、更高效的导航，使其成为航海技艺中不可或缺的一部分。