adjustment of the sextant

简明释义

六分仪校正

英英释义

例句

1.An improper adjustment of the sextant can lead to significant navigation errors.

不当的六分仪的调整可能导致重大导航错误。

2.The sailor made a quick adjustment of the sextant as the sun began to set.

随着太阳开始落下，水手迅速进行了六分仪的调整。

3.Before setting sail, the crew discussed the adjustment of the sextant procedures.

在出航之前，船员们讨论了六分仪的调整程序。

4.The captain performed the adjustment of the sextant to ensure accurate navigation.

船长进行了六分仪的调整以确保导航的准确性。

5.During the training session, we learned the importance of the adjustment of the sextant in celestial navigation.

在培训课程中，我们学习了六分仪的调整在天文导航中的重要性。

作文

The art of navigation has evolved significantly over the centuries, yet some tools remain timeless in their importance. One such instrument is the sextant, a device that allows sailors to determine their position by measuring the angle between a celestial object and the horizon. However, for a sextant to provide accurate readings, it requires precise calibration and maintenance. This process is known as the adjustment of the sextant, which is crucial for ensuring reliable navigation at sea.The adjustment of the sextant involves several key steps. First, the instrument must be checked for any physical damage or misalignment. A sextant typically consists of a frame, an arc, a telescope, and mirrors. If any part of the sextant is bent or incorrectly aligned, it can lead to significant errors in measurement. Therefore, regular inspections are necessary to identify and rectify any issues before setting sail.Once the physical condition of the sextant is confirmed, the next step in the adjustment of the sextant is to calibrate the instrument. This involves aligning the sextant's index mirror with the horizon. Sailors will often use a known reference point, such as a distant landmark or the sun at a specific time, to ensure that the sextant gives accurate readings. Any discrepancies found during this calibration process must be corrected by adjusting the screws or settings on the sextant.Another important aspect of the adjustment of the sextant is the verification of the telescope’s alignment. The telescope must be properly focused and aligned to ensure that the celestial objects are clearly visible. Adjustments may involve changing the position of the telescope or fine-tuning its focus to achieve a clear view of the horizon and celestial bodies. This meticulous attention to detail is essential because even a slight misalignment can result in navigational errors that could jeopardize a voyage.In addition to these technical adjustments, sailors must also be aware of environmental factors that can affect the accuracy of the sextant. Atmospheric conditions, such as refraction and temperature changes, can impact how celestial bodies appear on the horizon. Thus, part of the adjustment of the sextant includes understanding these variables and making mental calculations or adjustments based on current conditions.The importance of the adjustment of the sextant cannot be overstated. In the age of GPS and advanced navigation technology, one might wonder why such traditional methods remain relevant. The answer lies in the reliability and independence that the sextant offers. In situations where electronic systems fail or are unavailable, a well-adjusted sextant can be a sailor's best friend. It provides a means of navigating using the stars, a practice that has been used for centuries and continues to hold value today.In conclusion, the adjustment of the sextant is a fundamental skill for any navigator who wishes to master the art of celestial navigation. It requires a combination of technical knowledge, practical skills, and a deep understanding of the environment. By ensuring that their sextants are properly adjusted, sailors can maintain their ability to navigate effectively, regardless of the challenges they may face at sea. The sextant, though an ancient tool, remains a symbol of precision and reliability in the world of navigation, thanks in large part to the meticulous care taken in its adjustment.

航海的艺术在几个世纪中经历了显著的发展，但一些工具在其重要性上依然保持永恒。其中一种仪器是六分仪，这是一种允许水手通过测量天体与地平面之间的角度来确定其位置的设备。然而，为了使六分仪提供准确的读数，它需要精确的校准和维护。这个过程被称为六分仪的调整，对于确保海上可靠导航至关重要。六分仪的调整涉及几个关键步骤。首先，必须检查仪器是否有任何物理损坏或不对齐。六分仪通常由框架、弧形、望远镜和镜子组成。如果六分仪的任何部分弯曲或未正确对齐，可能会导致测量中的重大误差。因此，定期检查是必要的，以便在出航前识别并纠正任何问题。一旦确认六分仪的物理状态，就可以进行六分仪的调整的下一步，即校准仪器。这涉及将六分仪的指示镜与地平线对齐。水手通常会使用一个已知的参考点，例如遥远的地标或特定时间的太阳，以确保六分仪给出准确的读数。在此校准过程中发现的任何差异都必须通过调整六分仪上的螺丝或设置来纠正。六分仪的调整的另一个重要方面是验证望远镜的对齐。望远镜必须正确聚焦和对齐，以确保天体清晰可见。调整可能涉及改变望远镜的位置或微调其焦距，以实现对地平线和天体的清晰观察。这种对细节的细致关注是必不可少的，因为即使是轻微的不对齐也可能导致导航错误，从而危及航程。除了这些技术调整外，水手还必须意识到可能影响六分仪准确性的环境因素。大气条件，如折射和温度变化，会影响天体在地平线上的表现。因此，六分仪的调整的一部分包括理解这些变量，并根据当前条件进行心理计算或调整。六分仪的调整的重要性不容小觑。在GPS和先进导航技术的时代，人们可能会想知道为什么这样的传统方法仍然相关。答案在于六分仪所提供的可靠性和独立性。在电子系统故障或不可用的情况下，经过良好调整的六分仪可以成为水手最好的朋友。它提供了一种使用星星进行导航的方法，这种实践已经使用了几个世纪，并且今天仍然具有价值。总之，六分仪的调整是任何希望掌握天体导航艺术的导航员的基本技能。它需要技术知识、实践技能和对环境的深刻理解。通过确保他们的六分仪得到适当调整，水手可以保持有效导航的能力，无论他们在海上面临何种挑战。尽管六分仪是一种古老的工具，但由于其调整过程中的细致护理，它仍然是导航世界中精确性和可靠性的象征。