This course provides an understanding of hydrographic surveying in sufficient depth to enable the student to plan, carry out, and evaluate proposals for such a survey. Topics include Canadian legislation, oceanography and marine geosciences, marine positioning, depth determination using echo-sounders and multi-beam systems, side-scan sonar, some non-acoustic depth determination techniques, tides, hydrographic charts, data management, hydrographic survey specifications and project management.
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Upon successful completion of the course, the student will be able to:
- Describe the three main pieces of Canadian legislation that govern a large portion of hydrographic surveys conducted in Canadian waters.
- Demonstrate how Canada's offshore international boundaries are determined.
- Explain why a basic knowledge of oceanography and marine geosciences is necessary for the planning and conduct of hydrographic surveys.
- Recognize some key instrumentation used to collect oceanographic and marine geosciences physical samples and digital data.
- Relate the physical properties of water to the speed of sound in water and demonstrate how to calculate sound speed from measurements of temperature, pressure (depth), and salinity.
- Evaluate the various coordinate systems involved for the horizontal positioning for a hydrographic survey.
- Differentiate between the various vertical datums used in hydrographic operations and methods used to establish them.
- Explain the functions of marine positioning instrumentation used to determine system orientation and vessel heave.
- Illustrate the various sources of errors of horizontal positioning when conducting a hydrographic survey.
- Describe the principles of long, short and ultra-short baseline acoustic positioning system modes.
- Perform a water level datum transfer, for both tidal and non-tidal waters.
- Explain how acoustic system performance is affected by frequency, beamwidth, pulse-length, pulse repetition rate, detection threshold, bandwidth, and resolution.
- For single-beam echo-sounders:
- Explain the differences between narrow and wide beam transducers.
- Describe the various calibration methods.
- Explain the reductions needed to be made to measured depths due to water level variations, draft and transducer separation.
- Assess the uncertainty in soundings due to errors in the positioning system, echo-sounder, water level measurement, vessel motion and seabed topography and explain how to select appropriate methods for controlling or reducing sounding uncertainty for specific applications.
- For multi-beam echo-sounders:
- Explain the basic principles of multi-beam sonar transmit and receive beam forming and steering.
- Analyze and process a multibeam sensor calibration dataset, known as a Patch Test
- For side-scan sonar systems:
- Explain how side-scan sonar systems work.
- Interpret side-scan sonar records.
Effective as of Winter 2018
Hydrographic Surveying (GEOM 8195) is offered as a part of the following programs:
School of Construction and the Environment
Bachelor of Science Full-time
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