I run Navionics for running & an old Lakemaster chip for fishing. Sometimes I run with both units on Lakemaster. I just added a Navionics Platinum+ last month. For LOTW, Navionics will put the cursor on top of islands. Sometimes the contour lines are just aberations. I love the Navionics+ for WI & MN but it is lousy for LOTW as far as I am concerned. My Lakemaster chip is Version 3.