hydrographic

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Back in 1795 the increased need for reliable charts during the French Revolution led to the development of the Hydrographic Office of the Admiralty.
早在1795年法国大革命期间，对可靠的海图不断增长的需要推动了英国海军部水道测绘局的成长。
S410 Deepwater hydrographic and broadband echosounder has an enhanced hydrographic echosounder that supports single channel operation, and has a high ping rate of 20Hz at 15m.
S410深水水道测量和宽带回波器是一种增强型的水道测量回波器，可以支持单通道工作，响应频率高，在15米的距离上达到20Hz。
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With the establishment of the Hydrographic Office the British Navy had its own map department, engravers, and printing facilities.
随着水道测绘局的成立，英国海军有了自己的地图绘制部门、雕版工、印刷设备。

Damen has a long and proven experience in building hydrographic research vessels.
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