Definition And Purpose

Hydrographic Survey is to depict not only the relief of the seabed, including all features, natural and man0made, and to indicate the nature of the seabed in a manner similar to the topographical map of land areas but also to record data on tidal phenomena such as tidal regime, current, wave, salinity, wind etc as required by the client

Eligibility Criteria

To ensure accountability and professionalism in the conduct of Hydrographic Survey it is a must that quality, regulatory and disciplinary control be imposed on firms involved in this filed. The proprietor or partners of these firms must therefore be professionally qualified as well as registered with the Land Surveyors Board

To be eligible to carry out this specialised surveys, a firm must be equipped with the major instrumentation listed above.

Methodology and Instrumentation

Methodology and Instrumentation depend on whether it is coastal bathymetry, inshore of offshore hydrographic survey. However, in general the nautical charting role of hydrographic surveying consists primarily of water depth measurements, reduced to a datum plane at known positions on the sea surface. Additionally, information on the sea bed type, water movements and wave may be sought. Apart from the basic techniques as in navigation and positioning and geodesy, there are now many additional techniques.

In general, a hydrographic survey project will include all or a majority of the following tasks: