non-directional radio beacon

简明释义

无方向性信标

英英释义

例句

1.When flying cross-country, the non-directional radio beacon provided a reliable reference point.

在跨国飞行时，非定向无线电信标提供了一个可靠的参考点。

2.The pilot relied on the non-directional radio beacon to navigate during poor visibility conditions.

在能见度差的情况下，飞行员依靠非定向无线电信标进行导航。

3.Mariners use a non-directional radio beacon to ensure they are on the correct course.

海员使用非定向无线电信标确保他们在正确的航线上。

4.A non-directional radio beacon broadcasts signals that can be received from any direction.

一个非定向无线电信标发射可以从任何方向接收的信号。

5.Air traffic controllers often use a non-directional radio beacon to assist pilots in locating the airport.

空中交通管制员经常使用非定向无线电信标帮助飞行员定位机场。

作文

In the realm of aviation and maritime navigation, the importance of accurate positioning cannot be overstated. One of the key technologies that aid in this endeavor is the non-directional radio beacon. A non-directional radio beacon (NDB) is a type of radio transmitter that emits signals in all directions. This omnidirectional nature allows aircraft and ships to determine their position relative to the beacon, making it an essential tool for navigation, especially in areas with limited visibility due to weather conditions or geographical challenges.The operation of a non-directional radio beacon is relatively straightforward. It broadcasts a continuous signal on a specific frequency, which can be received by equipped aircraft and vessels. Pilots and navigators use onboard receivers to detect the signal and triangulate their position. The simplicity of this technology makes it accessible and reliable, particularly in remote locations where more advanced systems may not be available.Historically, non-directional radio beacons have played a crucial role in the development of air travel and maritime navigation. Before the advent of GPS and other sophisticated navigation systems, NDBs were among the primary means for pilots and sailors to find their way. They provided a lifeline in challenging environments, enabling safe travel across vast oceans and through rugged terrains. Even today, many airports and maritime routes still rely on these beacons as part of their navigational aids.One of the significant advantages of using a non-directional radio beacon is its ability to function in adverse weather conditions. Unlike visual aids, which can be obscured by fog, rain, or snow, NDBs emit signals that can penetrate through these obstacles. This reliability is crucial for ensuring safety during critical phases of flight or navigation, such as takeoff, landing, and maneuvering through treacherous waters.However, it is essential to recognize that while non-directional radio beacons offer valuable support for navigation, they are not without limitations. The accuracy of position determination using NDBs can be affected by various factors, including terrain, atmospheric conditions, and interference from other radio signals. As technology has advanced, alternative systems like GPS have emerged, providing greater precision and reliability. Nonetheless, NDBs remain a vital part of the navigation infrastructure, particularly in regions where modern technology may not be fully implemented.In conclusion, the non-directional radio beacon is a fundamental component of navigation systems in both aviation and maritime contexts. Its ability to provide reliable positional information in all directions has made it an indispensable tool for pilots and sailors alike. While newer technologies continue to evolve, the role of NDBs in enhancing safety and efficiency in navigation remains significant. Understanding how a non-directional radio beacon functions and its historical importance can deepen our appreciation for the advancements in navigation technology and the ongoing reliance on traditional methods in certain scenarios.

在航空和海洋导航领域，准确定位的重要性不容小觑。帮助实现这一目标的关键技术之一是无方向无线电信标。无方向无线电信标（NDB）是一种无线电发射器，它向所有方向发射信号。这种全向特性使得飞机和船只能够相对于信标确定其位置，使其成为导航的重要工具，特别是在由于天气条件或地理挑战导致能见度有限的地区。无方向无线电信标的操作相对简单。它在特定频率上广播连续信号，配备有接收器的飞机和船只可以接收到这些信号。飞行员和导航员使用机载接收器检测信号并三角测量他们的位置。这项技术的简单性使其在偏远地区易于获得且可靠，尤其是在更先进的系统可能无法使用的情况下。历史上，无方向无线电信标在航空旅行和海洋导航的发展中发挥了至关重要的作用。在GPS和其他复杂导航系统出现之前，NDB是飞行员和水手寻找方向的主要手段之一。它们在具有挑战性的环境中提供了一条生命线，使得安全穿越广阔海洋和崎岖地形成为可能。即使在今天，许多机场和航道仍然依赖这些信标作为导航辅助设备的一部分。使用无方向无线电信标的一个显著优势是其在恶劣天气条件下的功能。与视觉辅助设备不同，视觉辅助设备可能会被雾、雨或雪遮挡，而NDB发出的信号可以穿透这些障碍。这种可靠性对于确保在关键飞行或导航阶段（如起飞、着陆和在危险水域中机动）期间的安全至关重要。然而，必须认识到，尽管无方向无线电信标为导航提供了宝贵支持，但它们并非没有限制。使用NDB确定位置的准确性可能会受到各种因素的影响，包括地形、气象条件以及其他无线电信号的干扰。随着技术的进步，GPS等替代系统应运而生，提供更高的精确度和可靠性。尽管如此，NDB仍然是导航基础设施的重要组成部分，特别是在现代技术尚未完全实施的地区。总之，无方向无线电信标是航空和海洋环境中导航系统的基本组成部分。它在所有方向提供可靠位置信息的能力使其成为飞行员和水手不可或缺的工具。尽管新技术不断发展，但NDB在提高导航安全性和效率方面的作用仍然显著。理解无方向无线电信标的功能及其历史重要性，可以加深我们对导航技术进步的欣赏，以及在某些情况下对传统方法的持续依赖。