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navigation: marine | 航海，海上导航
| NAVIGATION of water craft. | 水上航行器的导航。 |
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navigation: offshore | 近海航行
| NAVIGATION at distance from a COAST, in contrast with COASTWISE NAVIGATION. | 在离岸一定距离的区域航行，区别于coastwise navigation（沿岸航行）。 |
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navigation: radio | 无线电导航
| See NAVIGATION: ELECTRONIC. | 参见electronic navigation（电子导航）。 |
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navigation: short range | NULL | NAVIGATION employing only aids usable at short RANGES. The opposite is LONG RANGE NAVIGATION. | NULL |
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navigation: sonic | 声波导航 | NAVIGATION by means of SOUND WAVES whether or not they are within the audible RANGE. Also called acoustic navigation. | 用声波方式进行的导航，不论该声波是否在可听范围。亦称acoustic line of position。 |
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navigation: submarine | 水下航行，潜水艇航行 | NAVIGATION of a submarine, whether submerged or surfaced. | 潜艇的航行，无论是在水下还是在水面。 |
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navigation: surface | 水面航行 | NAVIGATION of a craft on the surface of the EARTH. The expression is used particularly with reference to NAVIGATION of vessels on the sur... more | 某一交通工具在地球表面上的航行。该词用来特指船只在水面上的航行。 |
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navigation: underwater | 水下航行，潜航
| The NAVIGATION of a submerged vessel. Occasionally called SUBMARINE NAVIGATION. | 某一水下船只的航行，有时亦称潜水艇航行。 |
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navigational | 航行（海）的，导航的
| dj.). See NAUTICAL. | （形容词）。参见nautical（航海的）。 |
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navigational aid | 导航设备 | (U.S. terminology). An instrument, device, CHART, method, etc., intended to assist in the NAVIGATION of a craft. An AID TO NAVIGATION is a n... more | （美国术语）协助船只航行的仪器、装置、海图、方法等。航标是一种助航设备，但后者不应与前者混淆，因为前者仅指船只外围设备。 |
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navigational astronomy | NULL | See ASTRONOMY: NAUTICAL. | NULL |
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navigational drafts | 航行吃水
| See DRAFT. | 参见draft（吃水）。 |
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navigational observation | 航行观测
，导航观测 | Observations necessary to fix the position of a vessel. | 船只定位所需的观测。 |
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navigational parameters | 导航参数
| All data characterising the position and motion of a vessel in a system of coordinates. | 在坐标系中表示船只位置和运动的数据。 |
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navigational planet(s) | 航用行星
| See PLANET(S): NAVIGATIONAL. | 常用于天体观测的4颗行星：金星、火星、木星和土星。 |
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navigational (or navigation) satellite | 导航卫星
| An artificial earth-orbiting SATELLITE designed for navigational purposes. | 用于导航的人造地球卫星。 |
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navigational stars | 航用星
| Selected bright STARS whose POSITIONS are precisely tabulated in NAUTICAL ALMANACS for navigational purposes. | 选定的用于导航的明亮恒星，其位置精确地列在航海历中。 |
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navigational triangle | 航海三角形
| See ASTRONOMICAL TRIANGLE. | 参见astronomical triangle（天文三角形）。 |
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navigational warning | 航行警告
| A message containing urgent information relevant to safe navigation broadcast to ships in accordance with the provisions of the Internationa... more | 根据1974年修订的国际海上人命安全公约（SOLAS）向船舶播发的包含与航行安全有关的紧急信息的通报。参见coastal warning（沿海警告），local warning（地方警告），NAVAREA warning（航行警告区警告）。 |
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navstar global positioning system | 导航星全球定位系统
| A satellite navigation system. | 一种卫星导航系统。 |