dead reckoning

简明释义

航迹推算

英英释义

例句

1.The captain explained that dead reckoning is essential for long-distance voyages.

船长解释说，航位推算对于长途航行至关重要。

2.Despite the cloudy skies, the navigator managed to use dead reckoning to stay on course.

尽管天空阴云密布，导航员还是设法利用航位推算保持航向。

3.In the absence of GPS, sailors often rely on dead reckoning to determine their position.

在没有GPS的情况下，水手们常常依靠航位推算来确定他们的位置。

4.The pilot used dead reckoning to navigate through the stormy weather.

飞行员利用航位推算在暴风雨中导航。

5.Using dead reckoning, the team calculated their location based on speed and direction.

通过使用航位推算，团队根据速度和方向计算了他们的位置。

作文

In the realm of navigation and exploration, the term dead reckoning refers to a method used to estimate one's current position based on a previously determined position. This technique has been crucial for sailors and aviators throughout history, especially before the advent of advanced GPS technology. By calculating speed, time, and direction, navigators can project where they should be at any given moment. The essence of dead reckoning lies in its simplicity and reliance on basic mathematics, which makes it accessible even to those without sophisticated instruments.Historically, dead reckoning was employed extensively during long sea voyages. Sailors would take their last known position, often determined by celestial navigation or coastal landmarks, and then factor in the distance traveled over a set period. For instance, if a ship was sailing at a speed of five knots for three hours, the crew would calculate that they had moved fifteen nautical miles from their last position. However, this method is not without its challenges. Factors such as wind, currents, and human error can significantly alter a vessel's actual course, leading to discrepancies between the estimated and real position.Despite its limitations, dead reckoning remains relevant today, particularly in situations where electronic navigation aids are unavailable. Pilots of small aircraft, for example, may rely on this technique when flying over vast areas without visual references. In such cases, understanding how to accurately apply dead reckoning can mean the difference between safe travel and becoming lost in unfamiliar territory.Moreover, dead reckoning is not confined to maritime or aerial navigation; it also finds applications in various fields, including robotics and computer science. Autonomous vehicles utilize algorithms based on dead reckoning principles to navigate through environments. These systems continuously update their position estimates based on movement data, allowing them to traverse complex terrains without constant external input.In summary, the concept of dead reckoning serves as a testament to human ingenuity in overcoming challenges posed by navigation. It illustrates how fundamental skills, such as arithmetic and spatial awareness, can empower individuals to explore and traverse the world around them. As technology continues to evolve, the principles of dead reckoning remind us of our roots in exploration and the importance of understanding our environment, even in the face of modern advancements. Whether on the high seas, in the skies, or navigating through the digital landscape, the ability to accurately assess one’s position is a skill that will always be invaluable.

在航海和探索领域，短语dead reckoning指的是一种根据先前确定的位置估算当前位置的方法。这种技术对于历史上的水手和飞行员至关重要，尤其是在先进的GPS技术出现之前。通过计算速度、时间和方向，导航员可以预测他们在任何给定时刻应该处于的位置。dead reckoning的本质在于其简单性和对基本数学的依赖，这使得即使是没有复杂仪器的人也能掌握。历史上，dead reckoning在长途海上航行中被广泛使用。水手们会取最后已知的位置，通常通过天文导航或沿海地标确定，然后计算在设定时间内行进的距离。例如，如果一艘船以五节的速度航行了三个小时，船员就会计算出他们已经从最后的位置移动了十五海里。然而，这种方法并非没有挑战。风、洋流和人为错误等因素会显著改变船只的实际航向，导致估算位置与真实位置之间的差异。尽管有其局限性，dead reckoning今天仍然相关，特别是在电子导航设备不可用的情况下。例如，小型飞机的飞行员可能在飞越没有视觉参考的广阔区域时依赖这种技术。在这种情况下，理解如何准确应用dead reckoning可能意味着安全旅行与在陌生领土迷失之间的区别。此外，dead reckoning并不仅限于海洋或空中导航；它也在多个领域中找到应用，包括机器人技术和计算机科学。自主车辆利用基于dead reckoning原理的算法在环境中导航。这些系统根据运动数据不断更新其位置估算，使它们能够在没有持续外部输入的情况下穿越复杂地形。总之，dead reckoning的概念证明了人类在克服导航挑战方面的聪明才智。它展示了基本技能，如算术和空间意识，如何使个人能够探索和穿越周围的世界。随着技术的不断发展，dead reckoning的原则提醒我们要理解我们的根源，面对现代进步时也要理解我们的环境。无论是在浩瀚的海洋上、天空中，还是在数字领域中，准确评估自身位置的能力始终是一项无价的技能。