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词汇 Wire drag
分类 英语词汇 英语翻译词典
释义

Wire drag

英语百科

Hydrographic survey

A nostalgic 1985 sketch of hydrographic surveying in Alaska.
Neptune, a privately owned survey ship based in Chicago, Illinois.
A U.S. Coast and Geodetic Survey diagram of wire-drag hydrographic survey operations, ca. 1920. The basic principle is to drag a wire attached to two vessels at a set depth; if the wire encounters an obstruction it will come taut and form a

Hydrographic survey is the science of measurement and description of features which affect maritime navigation, marine construction, dredging, offshore oil exploration/offshore oil drilling and related activities. Strong emphasis is placed on soundings, shorelines, tides, currents, seabed and submerged obstructions that relate to the previously mentioned activities. The term hydrography is l used synonymously to describe maritime cartography, which in the final stages of the hydrographic process uses the raw data collected through hydrographic survey into information usable by the end user.

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