European Cooperation in Science and Technology
European Cooperation in Science and Technology
复制标题
欧洲科技合作
作者：
A. Wepster
因此，人们可能会感到奇怪，为什么需要对相同的术语作进一步的定义。航海研究所工作组将重点放在那些在海上仍有一些歧义的术语上，也许在课堂上甚至更多。总的来说，新术语符合或偶尔扩大BS 4883中给出的术语。当然，在这种情况下，跟踪和航向（一个长期困难的三人组），然而，工作组发现有必要区分矢量和航向（这并不一定意味着运动）；矢量被描述为轨迹。该图说明了所遵循的原则。这就产生了偶尔与英国标准不一致的条款。协会正在审查是否需要对BS 4883（也涉及空中航行）进行任何修改。
It might therefore be wondered why further definitions of the same terms should be needed. The Nautical Institute working party has concentrated on terms where it was felt there was still some ambiguity at sea, and perhaps even more in the classroom. In general, the new terms conform to, or occasionally amplify, those given in BS 4883. In the case of course, track and heading (a perennially difficult trio), however, the working party found it necessary to differentiate between a vector and heading (which does not necessarily imply movement); vectors are described as tracks. The figure illustrates the principles followed. This yields terms occasionally at variance with the British Standard. Whether any modification of BS 4883 (which also relates to air navigation) is called for is under review by the Institute.