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Old 12 August 2013, 23:39   #1
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Problem with Sonar

I have a Garmin 450s. The transducer is fitted in the hull using epoxy.

In water over about 4m deep it works fine even at speed.

However in water shallower than 4m it "looses lock" and the depth flashes. As soon as the water depth goes over 4m (ish) it re-establishes lock and all is well.

Anyone got any ideas?

Thanks in advance.

Ian Wilson

Sent from my HTC One X using Rib.net
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Old 13 August 2013, 02:28   #2
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Ian ... My Garmin 550s (transducer epoxyed in the transom well on centreline) works down to 2m. This is a replacement unit provided foc from Garmin a year ago. The original unit worked to 2m when new but after four years this suddenly shifted out to 4m for reasons not even Garmin could explain. They had it back, tested it, found nothing wrong but replaced it anyway. However, when questioned they told me that they couldn't actually bench test for shallow water performance.

You may have the same issue? Give Garmin Technical a call. They were very helpful and gave me a refurbished replacement (that looked new) even though mine was three years out of warranty.
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Old 13 August 2013, 11:21   #3
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However, when questioned they told me that they couldn't actually bench test for shallow water performance.
I'd think it would be easier to test for shallow performance than deep... Swimming pool comes to mind.


jky
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Old 13 August 2013, 11:52   #4
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RIBase
My garmon fish finder 160 c is similar at 3m
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Old 13 August 2013, 13:20   #5
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I'd think it would be easier to test for shallow performance than deep... Swimming pool comes to mind.

jky
Surprised me when they said send it back for test only to learn they couldn't test it.
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