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年法國大革命期間，對可靠的海圖不斷增長的需要推動了英國海軍部水道測繪侷的成長。
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深水水道測量和寬帶廻波器是一種增強型的水道測量廻波器，可以支持單通道工作，響應頻率高，在15米的距離上達到20Hz。
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With the establishment of the Hydrographic Office the British Navy had its own map department, engravers, and printing facilities.
隨著水道測繪侷的成立，英國海軍有了自己的地圖繪制部門、雕版工、印刷設備。

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