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archipelagic baseline(s) | 群岛基线
| See BASELINE. | 连接群岛最外围岛、礁的直线基线。 |
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archipelagic sea lane | 群岛海道
| Sea lanes designated by an ARCHIPELAGIC STATE for the passage of ships and aircraft. | 群岛国为船只和飞机通行规定的海上航道。 |
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archipelagic state | 群岛国
| A State constituted wholly by one or more archipelagos, eventually including other islands. | 完全由一个或多个群岛组成的国家。 |
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archipelagic waters | 群岛水域
| The waters enclosed by ARCHIPELAGIC BASELINES. | 被群岛基线包围的水域。 |
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archipelago | 群岛
，列岛 | A group of ISLANDS. | 聚集的岛屿。 |
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arc of triangulation | 三角锁
| See TRIANGULATION: ARC OF. | 一种有限宽度的三角系统，沿某一总体方向延伸。也称三角链（chain of triangulation）。 |
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arc of visibility | 可见弧
| The arc of a LIGHT SECTOR designated by its limiting BEARINGS in which a LIGHT is visible as viewed from a vessel. | 以限定方位标定灯光扇区的弧，在该区域内从船上可看见灯光。 |
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Arctic circle | 北极圈
| The GEOGRAPHICAL PARALLEL having a north latitude equal to the complement of the DECLINATION of the SUMMER SOLSTICE (latitude = 66° 33' N... more | 北纬纬度等于夏至点赤纬余角的地理纬圈（约为北纬66°33′）。 |
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arc to chord correction | 大圆改正
| The quantity used by seamen to correct a GREAT CIRCLE BEARING of a point B from a point A to a MERCATOR BEARING, and usually referred to as ... more | 航海人员把从A点到B点的大圆方位换算为墨卡托方位所使用的改正值，通常称半收敛差。在墨卡托投影中这... more |
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area | 区（域
）； | In United Nations Law of the Sea terminology the sea-bed and ocean floor and subsoil thereof, beyond the limits of national jurisdiction. | 1.在联合国海洋法公约术语中，指超出国家权限范围的海床、洋底及其底土。
2.在ECDIS中，指表示位置的某... more |
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area clearance | 扫海深度
| The effective depth, within specified limits, obtained by a WIRE DRAG SURVEY. | 在特定的范围内，通过扫海测量获取的有效深度。 |
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area to be avoided | 避航区
| A routing measure comprising an area within defined limits in which either navigation is particularly hazardous or it is exceptionally impor... more | 一种为避免发生航行危险或伤亡事故的定线航行措施，规定所有船舶或某类船舶航行应避开该区域。 |
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area survey | 区域测量
| A method of BOTTOM RELIEF SURVEY consisting of surveying overlapping strips which allow soundings to be obtained with a specified accuracy a... more | 一种包括重叠带测量的海底地形测量方法，它能按指定精度获取测量区域内任一点的水深。 |
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argillaceous | 泥质的，粘土的
| (adj.). Applied to all ROCKS or SEDIMENTS composed partly or completely of CLAY. | 指部分或完全由黏土组成的岩石或沉积物。 |
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arming | 测锤脂 | Tallow or other substance placed in the recess at the lower end of a SOUNDING LEAD for obtaining a sample of the BOTTOM. See BOTTOM SAMPLE. | 在测深锤下端凹部放置的油脂或其它物质，用于海底底质取样。参见See bottom sample（底质取样）。 |
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arm of the sea | 海湾
，峡湾，港湾 | A narrow portion of the SEA projecting from the main body. The expression is often shortened to 'arm'. | 伸进陆地的狭窄海域。该词有时简写为“arm”。 |
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ARPA | 自动雷达标绘仪
| See AUTOMATIC RADAR PLOTTING AID. | 自动雷达标绘仪。 |
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array(s) | 矩阵，阵列
| The order in which equipment (antenna, oceanographic equipment) or mathematical quantities are ordered. | 仪器设备（天线，海洋设备）或数值的排列顺序。 |
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articulated beacon | 活节式立标
| A vertical pipe structure that oscillates around a universal coupling connected to a sinker. The structure is kept upright by the buoyancy o... more | 可绕万向连接器摆动的垂直管状结构。万向节装置连接在沉石上，柱体靠水下浮动箱的浮力保持垂直。这... more |
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articulated light | 活节式灯标
| See ARTICULATED BEACON. | 参见articulated beacon（活节式立标）。 |