Garmin's focus has been avionics both fixed wing and rotor in recent years. In fact they are taking over the rotor market as well as big dent in fixed wing upgrades such as King Air ( the most produced civil aviation plane period ) and others. The marine sector is a secondary part of their business and but they will roar back as Garmin is jumping way a head of folks in research. All brands cycle that way just Lowrance is peaking with its tech now but others will pass them sooner or later as others research moves forward. Humminbird get 3d ( as lowrance ) with the 360 scan and look out.

For me it is about all that and this, your dealer! It is always best that your shop service ( or trouble shoot ) what you purchase. Works better.