Quote:
|
Originally Posted by Gildor
I am not an expert with Naval sensor terminology, but I was under the impression that SONAR and HYDROPHONES were not the same thing.
Isn't sonar the sensor to determine range to a target with a non-passive sound "ping", whereas the hydrophones are a passive listening device? i.e. two different apparatus.
Or am I completely off base here?
|
Not completely
SONAR stands for SOund Navigation And Ranging, so any sound-based locating device could be called 'sonar'.
Sonar devices fall into two categories; active and passive. Active sonar sends out a 'ping' to locate an object by echo while passive sonar is just for listening to whatever is out there.
Basically, hydrophones and the 'ping' are both sonar devices.