The speed of sound through ocean water is...

Question 1 / 2707066636ee928f7522a1c51a133

Question 1 of 2707066636ee928f7522a1c51a133

The speed of sound through ocean water is nearly always __________.

Question 1 of 27070

The speed of sound through ocean water is nearly always __________.

🔍 Key Concepts

• Speed of sound in seawater vs calibration speed used by most commercial fathometers • How temperature, salinity, and pressure affect the speed of sound in water • Why instruments are often standardized to a reference speed rather than local conditions

💭 Think About

• Think about whether instrument manufacturers pick an exact fixed value or try to match the true ocean sound speed everywhere. • Consider if the real ocean always matches that calibration speed, or if it is typically a bit higher or lower under normal conditions. • Ask yourself what happens to echo‑sounder depth readings if the actual sound speed is higher or lower than the calibration speed.

✅ Before You Answer

• Recall the typical sound speed in seawater (around 1500 m/s) and compare it to what echo sounders are usually calibrated to. • Consider whether the calibration speed is a convenient standard value or the maximum possible sound speed. • Think about whether warmer water increases or decreases the speed of sound, and how that would affect the relationship to a fixed calibration speed.

Question 1 of 27070

The speed of sound through ocean water is nearly always __________.

faster than the speed of calibration for the fathometer

the same speed as the speed of calibration for the fathometer

faster than the speed of calibration for the fathometer, unless the water is very warm

slower than the speed of calibration for the fathometer

Question 1 / 2707066636ee928f7522a1c51a133

Question 1 of 2707066636ee928f7522a1c51a133

The speed of sound through ocean water is nearly always __________.

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Question 1 of 27070

The speed of sound through ocean water is nearly always __________.