When 2d images can match the DI image below :
Then I'll go back to 2d !! LOL !!!
(Image taken with Lowrance Elite 5DSI unit, transducer mounted on TM.)
And, yes, both TM mounted DI & SI images will get "screwed up" with quick turns of the TM ... but, once the TM head is stationary, the image will clear up. And you do have to be aware of which way the TM head is pointing, since the sonar ping of a DI or SI is a narrow fan shaped band that emanates from the transducer at a 90deg angle (to each side).
Personally, I wouldn't pay too much attention (if any) to the commercial images shown on the packaging or in ads, when comparing brands. I also wouldn't take too much comfort in image comparisons between owners of different brands, since the owners could be miles apart in their understanding of their respective units, & their experience level with those units.
But I do concur with contacting Brian @ BBG Marine ... for the best deal, as well as consulting with him on what unit would be the best for whatever purpose you intend to use it for, and even where to mount it.
... pappy
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