I know your looking for a width pattern it will cover. All I can say for sure is it took me quite awhile to chart my local 300 acre lake. I did it over two days time with some fishing in between and the changes were amazing how far off the depths were. Took time but was well worth it. I did it while on the trolling motor it will turn different colors letting you know your speed is right. It also as mentioned got right into 1’ increments and from what I can tell from vertical jigging mostly with livescope and new map side by side it seems pretty right on