Answer:

SONAR

Answer	Crossword Clue
SONAR	Navigational device
SONAR	Locating detector
SONAR	Sub detector

SONAR	Underwater detection system
SONAR	What dolphins and bats have in common
SONAR	Bass boat device
SONAR	Detection device
SONAR	Dolphin sense
SONAR	Echo-locator
SONAR	Echolocation device
SONAR	Fish-finding apparatus

SONAR	Wolfpack locater
SONAR	Submarine acronym
SONAR	Fish finder
SONAR	Detecting device
SONAR	Marine detector
SONAR	Detection method
SONAR	Sub spotter
SONAR	Echolocation method

SONAR	Sub system
SONAR	Bat signal?
SONAR	Sub finder
SONAR	Torpedo spotter
SONAR	Antisub device
SONAR	Shipwreck seeker's tool
SONAR	Sunken-ship finder
SONAR	Acronym used down under?

SONAR	Fathometer, basically
SONAR	Sub apparatus
SONAR	Sunken-object detector
SONAR	Navigational aid
SONAR	Destroyer detector
SONAR	Tracking device
SONAR	Underwater device
SONAR	Deep-sea detector

SONAR	Sub-conscious sensor?
SONAR	Sub sensor
SONAR	Sub locator
SONAR	Tool for bats
SONAR	Whale finder