通航密度

船舶安全航速应当根据能见度、通航密度、船舶操纵性能和风、浪、水流、航路状况以及周围环境等主要因素决定。

The safe speed shall be determined on the basis of such main factors as visibility , traffic density , the maneuverability of the vessel , wind , wave , current , routing and surroundings .

现代船舶朝着大型化、高速化方向发展，船舶数量与水域通航密度及危险货物装载量不断增加，海损事故时有发生，严重威胁船舶航行安全及海洋生态环境。

With the development toward larger size and higher speed of modern ships , and the continuous increasing of ship 's quantity , traffic density and loading of dangerous cargo , marine accidents occur at times and seriously threatens the safe navigation of ship and marine ecological environment .

本文根据宁波港的自然条件和港口地位，通过分析AIS基站的作用范围、宁波港的覆盖范围以及宁波港船舶的通航密度之间的关系，确定宁波港建立AIS基站的个数应为3个。

Based on the research on the environment and location of the Ningbo port , AIS ' effecting area , and the relations of port 's service area and navigation distance between ships in and out the port , the research indicates 3 bases station for the system .

港内可航水域的宽度和深度受限、航道弯曲较多、船舶通航密度较大，对拖航过程中可能产生的风险进行了合理评估。

Because of the limited width and depth navigable waters in the port , the overmany bends in the channels and the large ship navigation density , a reasonable and scientific assessment of the hidden risks in the process of towing was made .

在跨江大桥数量不断增加的同时，大型内河船舶（队）及单船航行也愈来愈频繁，通航船舶流密度正逐年增大。

While the quantity of crossing river bridge unceasingly increases , the large-scale inland river ships ( team ) and the single ships also navigate more and more frequently , the density of ship flow is increasing year by year .