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relief displacement | 投影差，地形起伏位移
| DISPLACEMENT of IMAGES radially inward or outward with respect to the PHOTOGRAPH NADIR, according as the ground objects are, respectively, ... more | 由于地面物体分别在地底点高度之上或之下，因而使图像迅速朝着像底点或背离像底点发生位移，这种位移即为投影差。 |
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relief map | 立体地图，地势图
| See MAP. | 突出地貌或相对高程的地图。参见relief model（地形模型）。 |
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relief model | 立体模型
，地形模型 | A scaled representation in three dimensions of a section of the CRUST of the EARTH, or of another HEAVENLY BODY. A relief model primarily d... more | 以三维形式按比例表示地壳或其它天体的某一部分。主要用于显示地球表面特征的立体模型有时也称地形模型。 |
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remanence | 剩磁
| See MAGNETIC RETENTIVITY. | 参见magnetic retentivity（顽磁性）。 |
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remote sensing | 遥感，遥测
| The measurement or acquisition of information of some property of an object or phenomenon by a recording device that is not in physical or ... more | 利用不直接接触或远距离接触所研究的物体或现象的记录装置测量或获取该物体或现象的某些性质的信息。有时只限于采用从紫外线到无线电波段的仪器进行数据采集。 |
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remotely operated vehicle (ROV) | 遥控潜水器，水下机器人
| An unmanned submersible craft which can be used either for observation purposes or to perform hydrographic surveys, or for working purposes... more | （ROV）无人操作的水下器具，能用于观测或海道测量作业，或用于施工。亦称remotely controlled vehicle（RCV）(遥控潜水器)。 |
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repeatability | 重复精度
| See REPEATABLE ACCURACY. | 参见repeatable accuracy（重复精度）。 |
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repeatable accuracy | 重复精度
| In a navigation system, the measure of the accuracy with which the system permits the user to return to a position as defined only in terms... more | 在导航系统中，能使用户返回到仅适合该系统所确定之坐标位置的精度。例如，用于LORAN-C系统重复精度规定的距离，是两个LORAN-C位置的距离，这两个位置是在不同时间用同样的台站和时间差读数建立的。已知或未知的地理坐标和系统坐标间的相互关系。 |
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repeater | 复示器
| A device for repeating at a distance the indications of an instrument or device. See COMPASS REPEATER, GYRO REPEATER, STEERING REPEATER. | 能在一定距离上重复仪器显示的装置。参见compass repeater（罗盘复示器），gyro repeater（陀螺复示器），steering repeater（操舵罗经复示器）。 |
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repeating instrument | 复测仪
| See THEODOLITE: REPEATING. | 参见repeating theodolite（复测经纬仪）。 |
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repeating theodolite | 复测经纬仪
| See THEODOLITE. | 一种经纬仪，可将对某角的连续测量累计到度盘上并可读出度盘上表示该复测总和的最后读数。将该读数除以测角次数即可得出该角的观测值。亦称repeating instrument（复测仪）。参见repetition method of observation（重复观测法）。 |
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repetition method of observation | 重复观测法
| A method of observing horizontal angles by which the OBSERVATIONS of each angle are completed separately. See THEODOLITE: REPEATING. | 观测水平角的一种方法，每一个角重复观测数次。参见repeating theodolite（复测经纬仪）。 |
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repetition rate | 重复速率
| The rate at which recurrent SIGNALS are transmitted. Also called recurrence rate. | 发射重复信号的速率。也称recurrence rate（重复速率）。 |
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reported danger | 危险物（据报）
| An object dangerous to NAVIGATION which is shown on a CHART but the existence of which has not been confirmed. Sometimes called VIGIA. | 海图上表示的未经证实其确实存在的有碍航行的危险物。有时称为vigia（疑位浅滩暗礁）。 |
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representative fraction | 数字比例尺
| See SCALE: NATURAL. | 参见natural scale（自然比例尺）。 |
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reprint (of a chart) | 加印，重印 | (U.S. terminology). An issue of a CHART the supply of which is approaching exhaustion. The reprint is an exact duplicate of the current issu... more | （美国术语）。海图发行接近库存时的印刷。对现行海图的精确复制，对出版数据或印刷不加任何改变。 |
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reproducible | 复制版，可复制的
| An original drawing, photographic POSITIVE or NEGATIVE on stable base material to be used in the process of REPRODUCTION. | 在稳定的底基材料上建立原图图形的照像正片或负片，用于再生产。 |
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reproduction | 复制，复制品（图）
| In CARTOGRAPHY, the processes involved in printing copies from an original drawing. The principal processes are PHOTOGRAPHY, LITHOGRAPHY (o... more | 在制图过程中，指根据原图进行印刷、拷贝的工艺，主要工序是照像、制版和印刷。
任何复制工序制作的原图印刷拷贝。 |
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repromat | 清样，复制品
| Reproduction material, generally in the form of positive or negative copies on film or glass for each colour plate, from which a map or char... more | 用于复制的材料，一般在膜片或玻璃上形成各印色要素版的正像或负像，由此可以不再重绘而制出海图或地图。 |
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Rescue Co-ordination Centre (RCC) | 救助协调中心
| A unit responsible for promoting efficient organization of search and rescue services and for coordinating the conduct of search and rescue ... more | 负责提升搜救服务组织效率，并在搜救区域负责搜救协调组织的机构。也称为海上救助协调中心(MRCC)和联合救助协调中心(JRCC)。 |