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Author Topic:   Depth Sounder Clicking Sounds
Ricky posted 03-13-2008 02:58 PM ET (US)   Profile for Ricky   Send Email to Ricky  
Was out on my boat today on a beautiful day in South Florida balloon fishing for whatever. Everything was shut down on the boat except the chartplotter/sounder. I heard a clicking sound that I never heard before coming from the bilge area and opened the hatch and thought it may be coming from thru -hull transducer but couldn't be certain.

Turned off plotter sounder but noise continued for 30 seconds or so. Turned back on and clicking resumed. Seems obvious it is transducer but it continued after I turned unit off.

1.Do depth sounders produce an audible clicking noise? 2.Would noise continue after unit was turned off for 30 seconds or so?

Plotter sounder is Raymarine C80 on a BW Conquest 305.

bigjohn1 posted 03-13-2008 04:47 PM ET (US)     Profile for bigjohn1  Send Email to bigjohn1     
The ticking is the "pinging" (pulsing) of the transducer. Fishfinding sonar operates in the active mode vice passive mode - meaning it is always pinging down and bouncing its electronic "cone" toward the bottom.
Chuck Tribolet posted 03-13-2008 08:34 PM ET (US)     Profile for Chuck Tribolet  Send Email to Chuck Tribolet     
You have good ears. Be thanksful.

The transducer sends a pulse whose freq is WAY beyond what
even a kid can hear, but there's a faint click, I suppose from
the harmonics, or the transducer jumping a little.


Chuck

PeteB88 posted 03-14-2008 10:14 AM ET (US)     Profile for PeteB88  Send Email to PeteB88     
Hold your hand under it.

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