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	Term	术语	Definition	定义
	blow up	放大	Enlarge photographically.	用照相的方法放大。
	bluff	陡岸，悬崖	A CLIFF or HEADLAND with an almost perpendicular face.	几乎垂直于地面的悬崖或岬角。
	blunder	粗差，误差	See ERROR: GROSS.	参见gross error（总误差、粗差）。
	boat compass	艇用罗经	See COMPASS.	便于小船使用的安装在盒内的一种袖珍罗盘。
	boat grid	船架，船台	See CAREENING GRID or GRIDIRON.	参见careening grid （船架）。
	boat sheet	外业图板	(U.S. terminology). The work sheet used by the HYDROGRAPHER in the field for plotting the details of a HYDROGRAPHIC SURVEY as it progresses.... more (U.S. terminology). The work sheet used by the HYDROGRAPHER in the field for plotting the details of a HYDROGRAPHIC SURVEY as it progresses. See also FIELD BOARD.	美国术语。海洋测量人员在外业测量中用来标绘详细测量内容的图板。亦可见field board（外业图板）。
	boat slip	小船滑道	A SLIPWAY designed specifically for boats.	专为小船设计的船台滑道。
	bog	沼泽	Wet spongy ground consisting of decaying vegetation, which retains stagnant water, too soft to bear the weight of any heavy body.	由腐烂植物形成的潮湿海绵状地面，在这种地方滞留有大量的水分，地面太软而难以承受任何物体的重压。
	bold coast	陡岸	A prominent land mass that rises steeply from the SEA.	自海上陡峭隆起的显著陆块。
	bollard	系缆柱，带缆桩	Small shaped post, mounted on a wharf or dolphin used to secure ship's lines. Also see MOORING.	固定在码头或护墩桩上的小柱子，用于船舶系缆。亦可参见 mooring（系泊处）。
	boom	水栅，浮栅栏	A floating barrier used to protect a river or harbour mouth or to create a sheltered area for storage purposes.	一种木质浮动栅栏，用于保护河流或海港出口，或用于为存储目的设置屏障区。
	boomer	浅地层剖面仪	Seismic instrument for shallow penetration work. The boomer TRANSDUCER produces acoustic pulses by the motion of a metal plate in the water.	一种用于探测浅地层的仪器，其换能器在水中通过机械振动发出声脉冲。
	border	边界	The district lying along the edge of a country or territory; a frontier. The boundary line which separates one country from another, the fro... more The district lying along the edge of a country or territory; a frontier. The boundary line which separates one country from another, the frontier line.	国家或领土的边沿地带；将国与国分开的边界线。
	border break	破图廓	A cartographic technique to extend cartographic detail of a map or chart beyond the neatline into the margin to show important features. Thi... more A cartographic technique to extend cartographic detail of a map or chart beyond the neatline into the margin to show important features. This technique eliminates the necessity of producing an additional CHART. Also called Blister.	将地图或海图的内容超出内图廓线，绘至幅边以表示重要要素的一种制图技术。使用此技术就不需要绘制附加的海图。
	border of chart	海图图廓	The NEATLINE defining the limits of the area charted.	限定海图制图范围的内图廓线。
	borderland	边缘地带，交界地区	A region adjacent to a CONTINENT, normally occupied by or bordering a SHELF and sometimes emerging as islands, that is irregular or blocky i... more A region adjacent to a CONTINENT, normally occupied by or bordering a SHELF and sometimes emerging as islands, that is irregular or blocky in plan or profile, with DEPTHS well in excess of those typical of a SHELF.	毗邻大陆的地区，通常与礁石或岛屿接壤，或被其占据。多为不规则的块状，高差较大。
	border scale	图廓比例尺	See SCALE.	沿着海图边界绘制的分划比例尺。
	bore	涌潮，怒潮	A high breaking WAVE of water, advancing rapidly up an ESTUARY. Bores can occur at the MOUTHS of shallow RIVERS if the TIDE RANGE at the MOU... more A high breaking WAVE of water, advancing rapidly up an ESTUARY. Bores can occur at the MOUTHS of shallow RIVERS if the TIDE RANGE at the MOUTH is large. They can also be generated in a RIVER when TSUNAMIS enter shallow coastal water and propagate up the RIVER. Also called eager, mascaret, or tidal bore.	潮水迅速涌入河口时产生的高破碎浪。如河口潮差大，则涌潮可能发生在浅河口处。海啸进入近岸浅水区或沿河流传播时，也可能引起涌潮。也称作急潮、怒潮或涌潮。
	boring	破冰航行	Forcing a vessel under power through ICE.	船舶在动力作用下强行穿过冰区。
	bottom	河底，海底，水底	Any GROUND covered by water.	任何被水覆盖的地面。
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