Quote:
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Originally Posted by Konnrade
Quote:
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Originally Posted by Vikinger
Iam not an sub crew  but there is difference between active and passive sonar.
Active sonar is much more lauder and use a frequency that human ear can detect.
It was surface weasels that used active sonar and today also used by helicopters.
No submarine is using active sonar coz of the risk of detection today.
Difference is also that active sonar works like a radar. It detect objects by bouncning sound. While passive sonar is more listen to the surrounding like propchafts, engines etc.
If u want to know about sonar u can check it out here:
http://en.wikipedia.org/wiki/Sonar |
Also used by helicopters? Do they drag a sonar probe through the water beneath them? |
Hehe No. its very common in most navy that they use helicopters for submarine hunt. Helicopters hover (or how it is spelled ) and drop the sonar probe into the water and then listen for sounds.
A typicaly picture how it can look like can u se here:
http://svt.se/content/1/c6/13/92/50/Ubaatsjakt.jpg
If they find something they can then drop either depth charges or torpedoes. ( If they have that kind of weapon fitted)
Or call in reinforcement.