Multiple choice

Which instrument is used to measure the depth of the sea?

  1. Electrometer

  2. EEG

  3. Endoscope

  4. Fathometer

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

A Fathometer is a type of sonar instrument used to measure the depth of water or the depth of the sea floor. It works by sending sound pulses and measuring the time taken for the echo to return.