The Taming of the Shrew 5.1 Word Nerd: “sound”

The video tutorial explores the dual meanings of the verb 'sound': making noise and measuring depth. Historically, sailors used sounding to avoid running aground by measuring water depth with poles or weighted lines. In modern times, this practice has evolved with technology like the fathometer, which uses sound waves to measure water depth.

What modern device combines the two meanings of 'sound'?

How do ships use sound waves in relation to water depth?