Which is TRUE of echo-sounders?

Question 1 / 2707066636ee928f7522a1c51a3c3

Question 1 of 2707066636ee928f7522a1c51a3c3

Question 1 of 27070

Which is TRUE of echo-sounders?

🔍 Key Concepts

• How an echo-sounder actually works (it sends a sound pulse straight down and times the echo) • The difference between depth below the keel, depth below the transducer, and total water depth • Whether echo-sounders care if the bottom is hard or soft, or if they measure an average depth

💭 Think About

• Think about what exactly the instrument is physically able to measure: is it distance to the bottom, distance to the keel, or something else? • Ask yourself: does the instrument know anything about the keel position or waterline unless it is manually corrected or calibrated? • Consider whether the device can really calculate an average depth or if it simply measures one specific distance at that moment.

✅ Before You Answer

• Verify whether a standard echo-sounder reads from the transducer face down to the first strong return from the bottom • Check if any normal echo-sounder function involves calculating an average of depths • Consider if the instrument itself can inherently know keel clearance without being adjusted or offset by the operator

Question 1 of 27070

Which is TRUE of echo-sounders?

They measure the actual depth of water below keel

They measure the actual depth of water

They measure the average depth from waterline to hard bottom

They measure the average depth of water to soft bottom

Question 1 / 2707066636ee928f7522a1c51a3c3

Question 1 of 2707066636ee928f7522a1c51a3c3

Which is TRUE of echo-sounders?

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Question 1 of 27070

Which is TRUE of echo-sounders?