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Questions and Answers
When is the echo sounder typically used to check the depth of water?
When is the echo sounder typically used to check the depth of water?
- When the ship is accurately positioned
- When the ship is near the mouth of a river
- When crossing over a bar (correct)
- When the ship is in a poorly surveyed area
Which of the following devices is used to determine the depth of water by transmitting sound pulses into water?
Which of the following devices is used to determine the depth of water by transmitting sound pulses into water?
- Echo Sounder (correct)
- GPS
- Decca
- Radar
Why can't the signal used in an echo sounder be electromagnetic?
Why can't the signal used in an echo sounder be electromagnetic?
- There is heavy attenuation in water for electromagnetic signals (correct)
- It is too expensive to use electromagnetic signals
- Electromagnetic signals are not suitable for ranging
- Electromagnetic signals cannot be measured accurately
Which of the following is NOT a method used by a ship to determine its position?
Which of the following is NOT a method used by a ship to determine its position?
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What is the purpose of checking the depth of water with the echo sounder?
What is the purpose of checking the depth of water with the echo sounder?
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