THX, YOU MAY BE RIGHT BUT ONE I NOT SURE IF A THEMOCLINE HAS SET UP IN THE LAKE YET AND I AM NO EXPERT ON THEMOCLINES? THE OTHER THING IT'S BEEN PRETTY WINDY FOR ALMOST WEEK OUT THERE DOESN'T WIND AFFECT A THEMOCLINE? WHEN I HAVE SEE A THEMOCLINE IT WAS A SOLID RELATIVLY NARROW LIGHT GREY LINE OFF OF THE BOTTOM. HOWEVER WHEN I MARK FISH NEAR THE BOTTOM THEY THEY ARE VARIOUS SHAPES WITH AN ORANGE COLOR. WHILE THERE IS THERE IS QUITE A FEW RANDOM GREY LINES ETC THAT KINDA LOOK LIKE INTERFERENCE OR SOMETHING. MY UNIT IS SET FOR AUTO EVERYTHING. IF THOSE ORANGE MARKS ARE FISH UP THERE HIGH ON A BRIGHT WINDLESS SUNNY DAY THERE ARE LOTS OF THEM!!!??? I SEE THOSE MARKS EVERYTIME I GO OUT. PS: IF THEIR WALLEYES THEY MUST BE WEARING SUNGLASSES TOO. IT WAS SUPER SUNNY 2 DAYS IN A ROW AND DEAD CALM UNTIL 1 PM ON TUESDAY. LOL I WOULD APPRECIATE ANYONES INPUT.