[OT] Another Sonar Comment

G'day guys,

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
;)

Just something you might find passingly interesting

Beth

> Beth Fulton wrote:

> Not really about what blocks sonar, just something interesting I

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