If you go to Lowrance.com you can download a simulater that you can test drive all their depth finder products. Cool feature. Trouble is there is no one depth/fish finder that well work best in all areas with out spending $$$. Color has to be the way to go, in my grayscale finder I can't see it in certain light conditions(bright Sun).
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God grant me the serenity to accept the size of fish I catch, the courage not to lie about it, and the wisdom to know that no one would believe me anyways.