Multiple choice general knowledge

Fathometer is used to measure?

  1. Earthquakes

  2. Rainfall

  3. Sound intensity

  4. Ocean depth

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

A fathometer is an echo sounder used to measure water depth in oceans and lakes. It works by sending sound waves to the ocean bottom and measuring the time for the echo to return - this is called sonar (Sound Navigation and Ranging).