An echo sounder operates by measuring the time required for a ________.
A)light beam to travel from a satellite at a known altitude to the sea bottom and back
B)radar beam to travel from a harbor patrol boat to a fuzz-buster on a speeding yacht
C)radar beam to travel from a ship to the seafloor and back
D)sound pulse travels from a ship to the seafloor and back

Question

Quizplus · Accepted Answer

An echo sounder operates by measuring the time required for a sound pulse to travel from a ship to the seafloor and back. Through this method, it is able to create a profile of the seafloor and determine its depth. A and B are incorrect because they refer to the use of light and radar instead of sound. C is partially correct in that it mentions the use of radar, but not in the context of an echo sounder.

An Echo Sounder Operates by Measuring the Time Required for a ________