I have searched the forum and have not found what I am looking for. I don't know if an app like this has been created. I live in Florida and have a 22" deck boat. The water ways around me have a lot of channel markers that are not lit at night. What I would like to be able to do is have a app that I can pull along side of a channel marker and pin(mark it on the map) for my next night voyage. It would be nice to be able to write on the map like shallow area or rocks and it show up on the map every time I get close to that area. It could even remember some of my favorite destinations and the route I use during the day time. Like a smart chart plotter for small boats. Thanks for your time.