chart datum

简明释义

海图基准面海图基准面水深基准点

英英释义

例句

1.The depth of the water was measured relative to the chart datum.

水深是相对于图表基准测量的。

2.The pilot adjusted the aircraft's altitude based on the chart datum provided.

飞行员根据提供的图表基准调整了飞机的高度。

3.Local authorities updated the chart datum to reflect recent geological changes.

地方当局更新了图表基准以反映最近的地质变化。

4.When navigating, it's essential to know the chart datum for accurate positioning.

在导航时，了解图表基准以确保准确定位是必不可少的。

5.Sailors must refer to the chart datum when plotting their course.

水手在绘制航线时必须参考图表基准。

作文

Understanding the concept of chart datum is essential for anyone involved in maritime navigation and surveying. In simple terms, chart datum refers to a reference point or level from which depths of water are measured on nautical charts. This standardization is crucial because it ensures that all mariners and navigators have a common understanding of water depth, which can significantly affect safety and navigation decisions. Without a consistent chart datum, the risk of grounding or encountering underwater hazards increases dramatically.The importance of chart datum becomes evident when one considers the various factors that can influence water levels, such as tides, weather conditions, and seasonal changes. For instance, tidal variations can cause significant fluctuations in water levels, making it imperative that navigators account for these changes when planning their routes. By using a standardized chart datum, navigators can better interpret the information presented on nautical charts and make informed decisions about their voyages.Different regions may use different chart datum systems, which can lead to confusion if not properly understood. For example, the Mean Sea Level (MSL) is a commonly used chart datum in many parts of the world, but some areas might use local mean low water or other specific reference points. Therefore, it is crucial for mariners to be aware of the chart datum being used in the area they are navigating. This knowledge allows them to adjust their navigation strategies accordingly and avoid potential hazards.Furthermore, the advent of modern technology has introduced new tools for measuring and interpreting chart datum. GPS systems and electronic charting software have made it easier for navigators to access real-time data and make accurate assessments of their surroundings. However, it is still essential to understand the underlying principles of chart datum to effectively utilize these technologies. Relying solely on technology without a fundamental understanding of chart datum can lead to complacency, which could have dire consequences in critical situations.In addition to its significance in navigation, chart datum also plays a vital role in marine construction and environmental studies. Engineers and scientists often use chart datum as a baseline for projects such as harbor development, dredging operations, and ecological assessments. Accurate measurements based on a reliable chart datum ensure that these projects are executed safely and effectively, minimizing risks to both human activities and marine ecosystems.In conclusion, the concept of chart datum is integral to safe and effective maritime navigation, engineering, and environmental management. Understanding what chart datum means and how it is applied in various contexts is essential for anyone working in or around water. As we continue to advance in technology and science, maintaining a strong grasp of fundamental concepts like chart datum will remain critical in ensuring the safety and sustainability of our maritime activities.

理解图表基准的概念对于任何参与海洋导航和测量的人来说都是至关重要的。简单来说，图表基准指的是在航海图上测量水深的参考点或水平。这种标准化至关重要，因为它确保所有海员和导航员对水深有共同的理解，这可能会显著影响安全和导航决策。如果没有一致的图表基准，搁浅或遭遇水下危险的风险将大大增加。图表基准的重要性在于考虑到可以影响水位的各种因素，例如潮汐、天气条件和季节变化。例如，潮汐变化可能导致水位显著波动，因此在规划航线时，导航员必须考虑这些变化。通过使用标准化的图表基准，导航员可以更好地解读航海图上提供的信息，并对他们的航行做出明智的决策。不同地区可能使用不同的图表基准系统，如果不正确理解，可能会导致混淆。例如，平均海平面（MSL）是世界许多地方常用的图表基准，但某些地区可能使用当地平均低水位或其他特定参考点。因此，海员必须了解他们所导航区域使用的图表基准。这一知识使他们能够相应调整导航策略，避免潜在的危险。此外，现代技术的出现为测量和解释图表基准引入了新的工具。GPS系统和电子制图软件使导航员更容易访问实时数据并对周围环境做出准确评估。然而，仍然必须理解图表基准的基本原理，以有效利用这些技术。仅仅依赖技术而没有对图表基准的基本理解可能会导致自满，而在关键情况下可能会产生严重后果。除了在导航中的重要性外，图表基准在海洋建设和环境研究中也发挥着至关重要的作用。工程师和科学家通常使用图表基准作为港口开发、疏浚作业和生态评估等项目的基准。基于可靠的图表基准进行准确测量可确保这些项目安全有效地执行，最大限度地降低对人类活动和海洋生态系统的风险。总之，图表基准的概念对于安全有效的海洋导航、工程和环境管理至关重要。理解图表基准的含义以及它在各种背景下的应用，对于任何在水域工作的人来说都是必不可少的。随着我们在技术和科学方面的不断进步，保持对基本概念如图表基准的牢固掌握，将在确保我们的海洋活动的安全和可持续性方面继续发挥关键作用。