As shown in the illustrated echo sounding...

Question 1 / 2066636eed28f7522a1c51db0e

Question 1 of 2066636eed28f7522a1c51db0e

As shown in the illustrated echo sounding display unit and control panel and pertinent operating characteristic tables, what situation would require increasing the unit gain? Illustration EL-0186

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Question 1 of 20

66636eed28f7522a1c51db0e

As shown in the illustrated echo sounding display unit and control panel and pertinent operating characteristic tables, what situation would require increasing the unit gain? Illustration EL-0186

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🔍 Key Concepts

• Echo sounder gain and what it does to weak vs strong bottom echoes • How seabed consistency affects attenuation (dB) of the sound pulse (see the right-hand table in the illustration) • Relationship between higher attenuation and the need to adjust gain to see the bottom clearly

💭 Think About

• From the table, list the attenuation values for each bottom type in the answer choices, then arrange them from lowest to highest attenuation. Which direction (toward higher or lower attenuation) would make the echo weaker on the display? • Think about when your bottom trace would start to fade or break up on the screen: is that when the bottom is absorbing more or less of the sound energy? • For each transition in the choices, decide whether the attenuation is increasing or decreasing. In which case would you need to compensate by turning the gain up?

✅ Before You Answer

• Verify from the table which bottom type has the highest attenuation (dB) and which has the lowest. • Check that you understand that increasing gain is used to boost weaker return echoes, not stronger ones. • Before picking an option, confirm that your chosen transition goes from a lower attenuation bottom to a higher attenuation bottom (more absorption = weaker return).

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Question 1 of 20

As shown in the illustrated echo sounding display unit and control panel and pertinent operating characteristic tables, what situation would require increasing the unit gain? Illustration EL-0186

transitioning from a stone/rock seabed to a sand seabed

transitioning from a sand seabed to a stone/rock seabed

transitioning from a sand/mud seabed to a sand seabed

transitioning from a soft mud seabed to a mud/sand seabed

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Question 1 / 2066636eed28f7522a1c51db0e

Question 1 of 2066636eed28f7522a1c51db0e

As shown in the illustrated echo sounding display unit and control panel and pertinent operating characteristic tables, what situation would require increasing the unit gain? Illustration EL-0186

Back

Question 1 of 20

66636eed28f7522a1c51db0e

As shown in the illustrated echo sounding display unit and control panel and pertinent operating characteristic tables, what situation would require increasing the unit gain? Illustration EL-0186

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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