700 Fathoms

to manage, to watch or listen for

short for submarines””

retired, former; a title often used for college professors who have retired but may keep the title emeritus professor” as an honor”

the science of how animals and humans produce and receive sound

to lead, to be in charge of

something that happens; a fact or event; often refers to something complicated that can be studied

to come from, to come into being

a microphone designed to be used underwater