Garmin 7410 edge and shift functions

[BigE]

hi ausfishers

I'm not the most sounder literate fisho know a bit (enough to get me in trouble) and have been playing around in simulator mode on the garmin 7410 and noticed two functions which i have not used.

function 1 is shift , anyone know the purpose or advantage of this function?

function 2 is edge , same Q? as above

does anyone use these functions and if so what for?

BigE

[scottar]

Shift is usually a full screen "zoom" for lack of a better description. You can set a range eg 40 metres and then shift it to say 50 metres and the sounder will show from 50 to 90 metres

[scottar]

From the manual edge is to do with bottom hardness but I've never run a sounder with it.

[BigE]

Thanks scottar

might play with the edge function next time i'm on some flat country see if it will pick up soft spots in the bottom structure .

shift looks like it might be good for watching the bottom at speed , looks like it will increase the pixical count without stretching the image the way zoom does.

BigE