which underwater location would require the most time for a sonar signal to return back to the receiver?

Answer 1

The Marianas Trench in the western Pacific Ocean is the deepest natural trench in the world, with some points reaching depths of over 36,000 feet. Since sonar signals travel at a rate of approximately 1,500 meters per second in seawater, it would take the longest amount of time for a signal to travel to the bottom of the Marianas Trench and back to the receiver compared to other underwater locations.