non-directional beacon

简明释义

全向信标

英英释义

例句

1.A non-directional beacon emits signals that can be received from any direction.

非定向信标发出的信号可以从任何方向接收。

2.Pilots rely on non-directional beacons for position fixing during their flights.

飞行员依靠非定向信标在飞行中进行定位。

3.The airport installed a new non-directional beacon to improve safety.

机场安装了新的非定向信标以提高安全性。

4.The aircraft used the non-directional beacon to navigate through the fog.

飞机通过非定向信标在雾中导航。

5.During the training, the students learned how to use a non-directional beacon for navigation.

在培训中，学生们学习了如何使用非定向信标进行导航。

作文

In the world of aviation, navigation is a critical component that ensures the safety and efficiency of air travel. One of the essential tools used by pilots and air traffic controllers alike is the non-directional beacon. A non-directional beacon (NDB) is a type of radio transmitter that emits signals in all directions. This allows aircraft equipped with appropriate receivers to determine their position relative to the beacon. The importance of NDBs cannot be overstated, as they play a vital role in guiding planes, especially during adverse weather conditions or in remote areas where visual references are limited.The operation of a non-directional beacon is relatively straightforward. It broadcasts a continuous radio signal at a specific frequency, which can be picked up by an aircraft's receiver. Pilots use this information to navigate by tuning their instruments to the beacon's frequency and determining their bearing from the beacon. This is particularly useful when flying in low visibility situations, such as fog or heavy rain, where traditional visual navigation methods may fail.One of the key advantages of a non-directional beacon is its simplicity and reliability. Unlike other navigation aids that may require complex equipment or specific flight paths, NDBs provide a straightforward means of navigation. Additionally, because they operate on low-frequency radio waves, NDBs can be received over long distances, making them suitable for use in vast, open areas.However, there are some limitations to using a non-directional beacon. For instance, the signals can be affected by terrain and atmospheric conditions, which may lead to inaccuracies in navigation. Pilots must also be aware of potential interference from other radio signals, which could disrupt the beacon's transmission. Despite these challenges, NDBs remain a reliable tool in the aviation industry.In recent years, advancements in technology have led to the development of more sophisticated navigation systems, such as GPS. While GPS offers enhanced accuracy and additional features, the non-directional beacon continues to be an important part of the navigational landscape. Many airports still rely on NDBs as backup systems, ensuring that pilots have multiple ways to navigate safely.Moreover, understanding how to use a non-directional beacon is an essential skill for pilots in training. Flight schools emphasize the importance of mastering various navigation techniques, including the use of NDBs. This knowledge not only prepares future pilots for real-world flying but also instills a sense of confidence in their ability to navigate through challenging situations.In conclusion, the non-directional beacon is a fundamental navigation aid that has stood the test of time in the aviation industry. Its ability to provide reliable positioning information, even in challenging conditions, makes it an invaluable tool for pilots. As technology continues to evolve, the NDB may become less prominent, but its significance in the history of aviation and its ongoing utility in certain scenarios will always be remembered. Understanding how to utilize a non-directional beacon is crucial for any aspiring pilot, as it represents a key aspect of safe and effective navigation in the skies.

在航空领域，导航是确保空中旅行安全和高效的关键组成部分。飞行员和空中交通控制员都使用的一种基本工具是非定向信标。非定向信标（NDB）是一种无线电发射器，向所有方向发射信号。这使得配备相应接收器的飞机能够确定其相对于信标的位置。NDB的重要性不可低估，因为它们在引导飞机方面发挥着至关重要的作用，特别是在恶劣天气条件或视觉参考有限的偏远地区。非定向信标的操作相对简单。它以特定频率广播连续的无线电信号，飞机的接收器可以接收到这个信号。飞行员通过将仪器调谐到信标的频率来使用这些信息，从而确定自己与信标的方位。这在低能见度情况下尤其有用，例如在雾霾或大雨中，传统的视觉导航方法可能会失效。非定向信标的一个主要优点是其简单性和可靠性。与其他可能需要复杂设备或特定飞行路线的导航辅助工具不同，NDB提供了一种直接的导航方式。此外，由于它们在低频无线电波上运行，NDB可以在较长距离内接收，使其适合在广阔的开放区域使用。然而，使用非定向信标也存在一些局限性。例如，信号可能会受到地形和大气条件的影响，这可能导致导航不准确。飞行员还必须注意其他无线电信号可能造成的干扰，这可能会干扰信标的传输。尽管面临这些挑战，NDB仍然是航空行业中一种可靠的工具。近年来，技术的进步导致了更复杂的导航系统的发展，如GPS。虽然GPS提供了更高的准确性和额外的功能，但非定向信标仍然是导航领域的重要组成部分。许多机场仍然依赖NDB作为备份系统，确保飞行员有多种方法安全导航。此外，理解如何使用非定向信标是培训飞行员的一项基本技能。飞行学校强调掌握各种导航技术的重要性，包括使用NDB。这一知识不仅为未来的飞行员准备了现实飞行的能力，还增强了他们在困难情况下导航的信心。总之，非定向信标是航空行业中一种基本的导航辅助工具，经过时间的考验。它在挑战条件下提供可靠定位信息的能力，使其成为飞行员不可或缺的工具。随着技术的不断发展，NDB可能会变得不那么显著，但它在航空历史中的重要性及其在某些场景中的持续实用性将始终被铭记。理解如何利用非定向信标对任何有志成为飞行员的人来说至关重要，因为它代表了安全有效的空中导航的关键方面。