Practice Echo Sounders And Sonars (10.7.2) - Hydrographic Surveying

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8 questions

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6 sample questions

Question 1.
What does an echo sounder measure?
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Think about instruments used for navigation.
Question 2.
Name one type of sonar.
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Consider the technology that provides images of the underwater terrain.
3Question 3.
What technology is used by echo sounders to measure depth?
- Light pulses
- Sound pulses
- Radio waves
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Think about what travels well underwater.
4Question 4.
True or False: Multi-Beam Echo Sounders provide a single depth measurement.
- True
- False
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Consider the meaning of 'multi' in this context.
Question 5.
If an echo sounder sends out a pulse and it takes 3 seconds for the echo to return, what is the depth of the water (assuming the speed of sound in water is 1500 m/s)?
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Remember to divide by 2 since the sound has to travel to the bottom and back.
Question 6.
How would choosing a Single Beam Echo Sounder over a Multi-Beam Echo Sounder affect your data collection during a survey?
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Think about the scanning coverage of each device.

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