Introduction

A surveyor must have a means of measurement in the environment he works to define, dimension and describe the features they have been tasked to survey. Acoustics continue to be the primary means of subsea measurement. Acoustics is an extensive subject but a basic understanding of the acoustic theory and principles of sonar is essential to enable the surveyor to select the appropriate tool for the survey task and to utilize and interpret its output effectively.

Aims

This section of Offshore Surveying is designed to give you:


  • A thorough grounding in wave theory;
  • An understanding of essential acoustic theorem;
  • Familiarity with the principles of SONAR;
  • An understanding of the basis of SONAR interpretation.

Learning outcomes

At the end of this section you will be able to:


  • Calculate the speed of sound in water using multiple methods;
  • Establish the most accurate of such methods;
  • Analyse different forms of sonar acquisition;
  • Identify issues that affect the precision of depth measurements
  • Determine the procedures and technologies that can mitigate against, or eliminate, those issues.

Key


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