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Deals with the measurement and description of the features of the seas and coastal areas for the primary purpose of navigation Hydrography.

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Presentation on theme: "Deals with the measurement and description of the features of the seas and coastal areas for the primary purpose of navigation Hydrography."— Presentation transcript:

1 Deals with the measurement and description of the features of the seas and coastal areas for the primary purpose of navigation Hydrography

2 GPS Satellites Kinematic GPS Plate Boundary Reference Points On land Acoustic Ranging Seafloor Reference Point Trench Survey Vessel Slide credit: Masayuki FUJITA, Japan Coast Guard Hydrographers use many high tech tools

3 Receive Beams 20 - 1440 “beams” 20° fore-aft, 1° - 5° athwart Transmit Beam 1° - 5° fore-aft 90° - 170° athwart Depth Point Intersection of the transmit beam and one of the receive beams Slide credit: Dave Wells Multibeam Sonar

4 Rendered by Sirius Solutions, Dartmouth NS Slide credit: Dave Wells Pockmark found in English Bay To obtain dramatic results such as a view of the Empress of Ireland

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