Last boat I ran we put in a whole new Garmin setup in the tender we towed (a 37' Intrepid) including a CHIRP transducer. The bottom picture was very, very good. With lots of detail.
Not sure you really need it that good unless you are fishing and diving. For just cruising a regular transducer should be fine.
In fact on the big boat we installed another complete new Garmin setup at the same time and didn't bother with the CHIRP transducer. Still had a good bottom picture. Certainly more than good enough for cruising.
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