sonar

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Synonyms for 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

References in periodicals archive ?
The WISP industry in general, and Sonars Canadian client base in particular, expands our reach internationally.
Now, for the first time, a government agency has voted to quiet the use of such intense sonars in California waters, a major step in our ongoing efforts.
Minehunting sonars differ from ASW sonars in having high definition at the cost of range, and most systems rely on flat-plate transducers, but there are signs of a change.
To improve detection of the new breed of quieter submarine, the Navy hopes to employ a low-frequency active sonar array.
Contract Awarded for AquaPix Miniature Interferometric Synthetic Aperture Sonar and Real-Time SAS Signal Processor.
The Navy, however, is complaining to Congress, trying to push legislative exemptions that would prevent any restrictions from being imposed on the use of LFA Sonar and similar intense sonars.
A number of companies, including those producing ship-mounted and helicopter-borne dipping sonars have also developed training simulators.
Chief of the Naval Staff Admiral Sunil Lanba will formally take over the systems from the Defence Minister which include ABHAY Compact Hull Mounted SONAR for Shallow Water Crafts, HUMSA UG Upgrade for the HUMSA SONAR System, NACS Near-field Acoustic Characterisation System, and AIDSS Advanced Indigenous Distress SONAR System for submarines.
So far, NATO and the US Navy have refused to say what kind of active sonars were in use for the exercises.
The State-owned company pierced into the defence manufacturing sector only in 2014 through producing ship-borne positioning system dubbed as directing gears for sonars, which had been designed and developed by the DRDO lab Naval Physical and Oceanographic Laboratory (NPOL).
Alternative systems exist called "passive" sonars that do not broadcast sound, but instead depend on computer-enhanced microphones to detect ship engine noises at long distances.
Under the contract, to be implemented over the next 10 years, the company will provide and support new hull-mounted sonars for consolidation on the navy's eight Type-23 frigates.