I am headed North to do some hook and line fishing for Lake Trout and Salmon on Lake Michigan. This a bit of a do it yourself trip and I would like to use and online Nautical Chart to pre program my GPS for bottom structure. I have used a web site called My Topo Free Online Maps for land navigation. This excellent web site allows me to move the cursor across the map and on the left hand side give me the precise Coordinates that I can use to program the GPS in Advance, which I find very handy for finding interesting spots.

I have found nautical charts for Lake Michigan, but none that allow me to find the GPS Corrordinates for interesting spots.

If somebody has some ideas I would appreciate them

at boating stores they sell commercial maps which have fishing spots wrecks and reefs, they are also waterproof, and though not necessarilly current not bad for navigation