scatter rap

I fish on a lake that is 5ft to 6 ft. deep for the most part. Trolling cranks(walleye). Want to give the scatter rap size 5 shad a try, I use the trolling app as a guide. It lists the 5 ft. down is 13ft of xt line back. Is this correct? also has it diving down to 22 ft. on a long line. I looked to make sure I downloaded the right lure. Anyone been shallow trolling these? To confirm this, or am I missing something.

That is what I get on my app too for depths. There must be a mistake though because the 7 says 27 feet to dive to 5 feet

I thought the same thing, as I did a search, and sounds more like it is inline with a shallow shad rap for depth.