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Didd · 03-20-11, 04:02 AM

I don't know if it's relevant, but in my fishing boat, if I pass astern of something like a ferry, then the depth sounder goes all screwy for a good distance behind the ferry, presumably due to aeration and/or turbulance. I would hazard a guess that this would persist for at least a good 60s after the ferry passes.

03-20-11, 04:02 AM	#7
Didd Seaman Join Date: Dec 2009 Location: Orkney Posts: 33 Downloads: 90 Uploads: 0	I don't know if it's relevant, but in my fishing boat, if I pass astern of something like a ferry, then the depth sounder goes all screwy for a good distance behind the ferry, presumably due to aeration and/or turbulance. I would hazard a guess that this would persist for at least a good 60s after the ferry passes.