sonar vs measuring system

sonar and measuring system both are nouns.

Word	Noun	Adjective	Verb	Adverb
sonar	Yes	No	No	No
measuring system	Yes	No	No	No

As nouns, measuring system is a hypernym of sonar; that is, measuring system is a word with a broader meaning than sonar:

sonar: a measuring instrument that sends out an acoustic pulse in water and measures distances in terms of the time for the echo of the pulse to return
measuring system: instrument that shows the extent or amount or quantity or degree of something

Other hypernyms of sonar include measuring device, measuring instrument, navigational instrument.

sonar (noun)	measuring system (noun)
a measuring instrument that sends out an acoustic pulse in water and measures distances in terms of the time for the echo of the pulse to return	instrument that shows the extent or amount or quantity or degree of something