ADMIRALTY MANUAL OF HYDROGRAPHIC SURVEYING PDF

While the challenges for navigation remain as relevant today, an ever increasing need to seek economic benefit from our oceans is closely coupled with our determination to maintain a healthy, sustainable marine environment. The requirement to accurately measure the effects of climate change in our oceans has never been more important. It is the role of hydrographic surveyors to acquire comprehensive, accurate information in an agile and efficient manner to enable the best possible decision to be made. The work is of an arduous and often trying nature, but unlike many other occupations in life, it results in a tangible and permanent record of the surveyors labours and is often subsequently of historical interest… Moreover, the information he gathers is essential for the furtherance of scientific knowledge of the world in which we live.

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Hydrographic surveys are used to define shore line and under water features. Objectives of Hydrographic Surveying: Hydro-graphic surveying are carried out for one or more of the following activities. Measurement of tides for sea coast work e. Determination of bed depth, by soundings For navigation Location of rocks, sand bars, navigation light.

Fro location of under water works volumes of under water excavation etc. In connection with irrigation and land drainage schemes. Determination of direction of current in connection with The location of sewer any pipe or channel that carry waste water out falls. Determination of area subject to silt and scour the eating of the place.

Fornication purposes. Measurement of quantity of water and flow of water in connection of water schemes, Power scheme and flood controls. Drilling rigs extracting oil, gas etc from deep sea locating up to miles offshore, search for resources particularly oil and gas.

Offshore islands are constructed of dredged material to bring material form some where and dump there to support marine structure. Harbor depth up to 80 is required to accommodate larger ships and tankers. Containerization has become an efficient and preferred method of cargo handling. The demand for recreational transportation ranges form large pleasure cruise ships to small sail bonds.

Cruise ships to small sail bonds. Hydro graphic surveys are made to a quire and present data on oceans, lakes and harbors. It comprises all surveys made for The determination of shore lines, soundings measurement of depth below the water level characteristics of bottoms, areas subjected to Scouring and silting, depth available for navigation and velocity as well as characteristics of flow of water. The location of lights rocks sand balls, buoys anything that floats on the surface of water Hydrographic Survey Video.

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