captain_yellafin wrote:ok im gonna play it safe and go with the garmin 421s and upgrade with the BlueChart g2 Vision card for the gulf coast....but i have a question...it does not come with the transducer and ebay has the "GARMIN TROLLING MOTOR TRANSDUCER FOR GPSMAP 420S 421S"...is this the same as a dual frequency transducer?
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