Name the waves used for echo depth sounding.(b) Give one reason for their use in the above application.

Types of Waves Used for Echo Depth Sounding

1. Acoustic Waves: These are sound waves that propagate through water. They are typically used in echo sounding because they travel efficiently in aquatic environments.

Reason for Their Use

1. Effective Transmission and Reflection: Acoustic waves are used in echo depth sounding due to their ability to penetrate water and get reflected back from the seabed. This reflection allows for precise measurements of underwater depths when the travel time of the wave is calculated. Their speed in water (approximately 1500 meters per second) makes them particularly effective for determining various underwater features and depths, which is essential for navigation, fishing, and scientific research.