Once I have found my spot (and settled down with a brew), I flick the Deeper out into my swim. When the wind is from behind me I let it drift about slowly across the lake over my area and also on to other areas of the lake.
It works into areas you without disrupting the carp who may be in the swim where you’re baiting up. It also maps out a larger area with less effort. You can sit back and watch the lake (and the screen at your own pace). This really helps on large lakes where it will clearly take you a long time to map the areas you have not and fill in any gaps.
With floating braid on you can also let the Deeper drift under the overhanging tree, where you would never get a marker float to go.
Hope this helps