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Old 09-08-2018, 08:54 AM   #1
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B&G Depth Sounder Issue

I am having an issue with my B&G depth sounder. I have a Raymarine for redundancy so not critical, more annoying.

It reads fine, matching the other reading, then it starts dropping through the numbers down to zero, and after a few seconds starts coming back up again to the accurate reading. This happens pretty constantly.

Any thoughts on where to troubleshoot, or just better/easier to replace the transducer on the next haul?
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Old 09-08-2018, 09:58 AM   #2
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Is the transducer in the water or inside on the hull?
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Old 09-08-2018, 10:16 AM   #3
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What's the transducer? I have had a lot of trouble with the Airmar DT800/DST800 "smart" transducer that connects directly to NMEA 2000. And I have read of a lot of other people having issues. The same transducer is sold by all the usual marine electronics suspects, sometimes under different model names, but all the same thing.
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Old 09-08-2018, 10:33 AM   #4
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Sounds like the transducer is failing intermittently.
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Old 09-09-2018, 12:21 PM   #5
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Not much to do but make sure the connections are clean and tight. I have a Lowrence here in NJ that gives me me trouble at least once a year. Cleaning seems to solve the problem until next year.
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Old 09-09-2018, 05:21 PM   #6
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If it is consistent and very precise in the number changing....

Sounds like something in the depthfinder more so than environmental or transducer.

Losing bottom regularly is common, but a regular and steady countdown then back is new to me.
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Old 09-09-2018, 09:52 PM   #7
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Quote:
Originally Posted by twistedtree View Post
What's the transducer? I have had a lot of trouble with the Airmar DT800/DST800 "smart" transducer that connects directly to NMEA 2000. And I have read of a lot of other people having issues. The same transducer is sold by all the usual marine electronics suspects, sometimes under different model names, but all the same thing.
I have 2 Airmar transducers. Believe one is a DT800. Depth is fine; temperature is all over the place.

Ted
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