Re: [OT] Another Sonar Comment

Beth Fulton wrote:

> Not really about what blocks sonar, just something interesting I
stumbled
> over today. Just finished a paper which indicates that Humpback whales
> 'sing' in order to locate and transmit info on scales of 5 nautical
miles
> (about 9.25 km) and apparently have even more specialised pulses which
> allow for tracking/location of individuals on the scale of 70+nm
(129.5+km)
> - and that was without using convergence zones/thermocline bouncing to
> increase range! I believe this gives them something like the
equivalent or
> better of military sonar - talk about save on long distance phone
calls 

Yup. Better than all but a very few active arrays. Very Low Frequency.

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