to monitor
to manage, to watch or listen for
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