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RE: [PSUBS-MAILIST] Hydrophones
We 
didn't have an opportunity to test range.  We did a demonstration on a 
dock which was probably close to 100 feet long.  I can only tell you that 
based on a distance of 100 feet, the loudness of the pinger picked up from the 
home-built hydrophone was noticably diminished from what I observed in fresh 
water.  That's very subjective based upon my hearing, which is why having 
others perform some testing is really necessary.  In fresh water, 
relatively shallow (20-50 feet) which is all I had available for testing, the 
range was close to a quarter mile over the surface.
 
Jon
 
  
  Jon
I look forward to 
  seeing the documentation.  What was the range capability to the pinger in 
  sea water?  
  Have A Nice 
Day.
  Doug