What will NOT induce errors into a Doppler...

Question 1 / 2066636ee928f7522a1c5199a6

Question 1 of 2066636ee928f7522a1c5199a6

What will NOT induce errors into a Doppler sonar log?

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Question 1 of 20

66636ee928f7522a1c5199a6

What will NOT induce errors into a Doppler sonar log?

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🔍 Key Concepts

• Doppler sonar log measures speed through water using sound waves and the Doppler effect • How hull attitude and motion (roll and pitch) affect the direction of the sonar beams • How draft and vibration might change the geometry, angle, or clarity of the sonar signal

💭 Think About

• Which of these options would change the angle or direction of the sonar beams relative to the water? • Which factor mainly changes how the ship sits in the water (depth) but not the pointing direction of the transducers? • Which effect is most likely to cause signal noise or intermittent readings rather than a steady geometrical error?

✅ Before You Answer

• Identify which motions of the vessel (roll, pitch) alter the orientation of the transducer with respect to the water flow • Consider whether increased draft changes beam direction or mainly distance from the keel to the water surface • Think about which condition would cause mechanical/structural vibration that could disturb the sonar equipment or its readings

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Question 1 of 20

What will NOT induce errors into a Doppler sonar log?

Increased draft

Excessive vibration

Roll

Pitch

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