When does a Doppler speed log indicate speed...

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Question 1 of 2066636ee928f7522a1c5195ff

When does a Doppler speed log indicate speed over ground?

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66636ee928f7522a1c5195ff

When does a Doppler speed log indicate speed over ground?

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🔍 Key Concepts

• Doppler speed log operating modes (water track vs. bottom track) • Difference between speed over ground (SOG) and speed through the water (STW) • How water depth affects whether the Doppler return is from the seabed or from particles in the water column

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• Which operating condition or mode allows the Doppler log to measure motion relative to the seabed instead of relative to the water? • In what depth range can the Doppler signal reliably reflect off the bottom to give a usable ground reference? • How would current affect a log that measures speed through the water versus one that measures speed over ground?

✅ Before You Answer

• Identify which option corresponds to using bottom tracking rather than water-mass (volume reverberation) tracking • Check whether current prevents or simply changes the difference between speed through water and speed over ground • Consider the practical depth limitation beyond which the echo from the seabed is too weak for accurate bottom tracking

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Question 1 of 2066636ee928f7522a1c5195ff

When does a Doppler speed log indicate speed over ground?

Back

Question 1 of 20

66636ee928f7522a1c5195ff

When does a Doppler speed log indicate speed over ground?

No comments yet

Be the first to share your thoughts!

If the question has a related picture, it will appear here.

🔍 Key Concepts

💭 Think About

✅ Before You Answer

👋 Hi! I'm Genie, your AI study assistant. How can I help you with this question?

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