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Old 09 June 2008, 15:03   #1
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Dolphins Die

http://news.bbc.co.uk/1/hi/england/cornwall/7443626.stm

So sad. I was 500yds from the spot yesterday afternoon.
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Old 09 June 2008, 18:32   #2
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Very sad pictures on the late news tonight . There are reports of other strandings along the Cornish coast , another theory mentioned was the posiblity of naval sonar confusing the dolphins.

Lets hope its a one off .
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Old 09 June 2008, 19:49   #3
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depressing news, they are such brilliant animals
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Old 10 June 2008, 15:38   #4
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Originally Posted by ian parkes View Post
Very sad pictures on the late news tonight . There are reports of other strandings along the Cornish coast , another theory mentioned was the posiblity of naval sonar confusing the dolphins.

Lets hope its a one off .
The Royal Navy WAS carrying out a sonar survey at the time.

http://news.bbc.co.uk/1/hi/england/cornwall/7446823.stm

I have always turned my echosounder off if there are dolphins around - how many people bother I wonder? I bet my Raymarine has a bit less power though........
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Old 10 June 2008, 15:45   #5
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The Royal Navy WAS carrying out a sonar survey at the time.

http://news.bbc.co.uk/1/hi/england/cornwall/7446823.stm

I have always turned my echosounder off if there are dolphins around - how many people bother I wonder? I bet my Raymarine has a bit less power though........
Umm, I'm not convinced with the Navy sonar theory. I think that they took a wrong turn up the wrong creek and paniced as the tide retreated. Very sad whatever the reason.
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Old 10 June 2008, 16:02   #6
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Umm, I'm not convinced with the Navy sonar theory. I think that they took a wrong turn up the wrong creek and paniced as the tide retreated. Very sad whatever the reason.
Happens all the time in the Tasmania Strait. Aussie Navy have been blamed but no facts so far.
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Old 10 June 2008, 16:57   #7
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Lets hope Mollers is right , I haven't seen any more reports on the other reported strandings
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Old 12 June 2008, 14:56   #8
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Turning off your echo sounder only turns off the screen the transmitter still sends pulses as long as you battery switch is on. To be able to switch the transmitter off you have to fit a switch between the battery and unit. I used to think I was switching mine off by turning the screen off until a friend was testing a pod (a unit that picks up and records cetacean activity in an area when left on the sea floor) to see how our boat registered for sound. Even though I thought the echo sounder was off it still registered.
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Old 13 June 2008, 07:51   #9
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There is switch on my DSM300 module that I flip.

I am dubious about sonar hurting them as Dolphins seem to be quite at home in places like Gib harbour etc where there are loads of ship movements - they wouldn't be there if they didn't like it BUT maybe if they are already confused or in danger they don't help.
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Old 13 June 2008, 08:05   #10
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Codders, were is the switch ? couldn't see one on mine but would like to switch it off when the boat is sat on the trailer and I am playing with the C80.

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