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Hummingbird 899 transducer


Diago

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With many boats, you don't get a good reading of the bottom with the 'Bird SI units when on plane. You can add a second 'ducer mounted separately and connected with a Y cable to work around that - I'm guessing that's what diago is referring to here.

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With many boats, you don't get a good reading of the bottom with the 'Bird SI units when on plane. You can add a second 'ducer mounted separately and connected with a Y cable to work around that - I'm guessing that's what diago is referring to here.

Exactly. It all depends on the boat and the transducer location. On my Alumacrft Classic 165, I can get good readings at my top speed of 29 mph. I've seen posts of good results up to 40 mph also. Stepped transoms are somewhat problematic, and lots of sparkly glass boats need a separate 2d transducer for high speed readings. The Y-cable uses the 2d signal from the 2d transducer and the SI signal from the SI transducer. It doesn't matter how far apart they are.

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