Garmin transducer question

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I am going to upgrade my electronics to include side vision.  What is the difference between the gt54 and gt56 transducers?

[Choporoz]

There are a couple good comparison videos out there,  like

I have a gt52 on my kayak and gt56 on my boat and I see a huge difference.   Difference between gt54 and gt56 is not nearly as great, based on the videos I've seen.... but there certainly is better definition from the gt56.

[12poundbass]

Exactly. The GT56 has a little better imaging than the 54 and I believe it can go deeper as well. I have a 54 on both my Echomaps. Not a big enough difference for me to even consider changing to 56’s. 

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Thanks so muck