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Raymarine forum / Raymarine Forums / Instruments v / [CA] [CA11] Speed over ground vs through water

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[CA] [CA11] Speed over ground vs through water
09-07-19, 12:40 PM (This post was last modified: 09-12-19 01:49 PM by Chuck - Raymarine - Moderator.)
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philipdawsonladds Offline
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[CA11] Speed over ground vs through water
I noticed something odd on my display yesterday which someone might have a thought about. I recently removed and cleaned the paddle wheel on my ST60 speed transducer. The speed is reading out fine. On my C120 MFD I have the SOG displayed which I understand will be affected by the current. So I was travelling against the tide but SOG was reading HIGHER than the ST60 display - when travelling with the tide, same thing (but to be expected this time). It seems that my SOG is always higher than speed through the water. Something's not right - any ideas on what I might check? Thanks
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[CA11] Speed over ground vs through water - philipdawsonladds - 09-07-19 12:40 PM

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