Share Electronics fact I just learned on side scanning

[rnvinc]

So if you turn off the contour lines on a hb unit so the beneath the boat view isn't showing will you get a true 40ft range or will it still be the slant measurement?
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Well slant range ...sorta ...

The 40' (using the same 40' SI Range) with the HB "Contour On" setting eliminates the water column from the displayed image ... but the 40' is still slant range from the xducer to the edge of the display ...

So you're still only seeing 32.7' of bottom coverage (horizontal distance) ... the 32.7' is simply "stretched out" to fill the display without the water column ...

I will explain why the engineers designed it this way in a following post (because it's a lengthy explanation) ...

Rickie