Thread: puzzled!!!!

It is unlikely to find a bundled unit with the GT included ... Those would be really old stock ... Back before the 1st litigation that made Garmin cease adding the GT xducer in bundled units ...

It seems from current reports Garmin will still be bundling the CV xducer going forward ... Garmin has released no info on that reported decision - nor any decision to offer the GT xducer in any type of concession for customers... (Doing so could infer they were wrong in the whole GT vs CV debate and that ain't gonna happen) ...
-----
-----

It is a fact the CV xducers do not have a dedicated DI piezo ... but instead blends the data from the SI piezoes and computer generates that SI data into a DI "looking" view ... (Similar to the well documented and discussed Humminbird "DI from SI" technology in place since early 2011) - (I can explain that HB decision at another time) ...

The "engineering" important point to understand in that scenario is that any piezoe's sound pulse is factually going to be stronger along the "Main Axis" of that sound pulse (which is approximately 30° from horizontal in a HB SI piezo - as seen in the beam form depiction below) ...

This leaves any target farther away from the "Main Axis" (targets under the boat) not reflecting as much of the sound pulse echo strength and those targets under the boat will not be painted as "distinctly" in the DI (from SI) image ...

The analogy I use in my seminars is ... imagine pointing a flashlight at your shoes (dedicated DI) = and your shoes will be illuminated very well ...

Now imagine pointing a flashlight left and a flashlight right at about 30° from horizontal (DI from SI) = and your shoes are still going to be illuminated - just not as well ...

Now that does not mean DI from SI is junk - it simply means that SI piezoes cannot (technologically) receive as strong of echoes from targets directly under the boat as a dedicated DI piezo pointing straight down (think flashlights again) ...

The good news is - the GT xducers can still be purchased and will still work with these units ... and I simply feel it should be considered an xducer upgrade that some users may want (if DI is important to that user's fishing methods) ...

Rickie