i recently purchased the navionics + for my 1198. I like how easy the download was for the chip. You can download up to 2gb data any where in us/canada. select your area you want, down load, select another area, etc. It keeps track how much you have downloaded and then you can update for a year. awesome for me. I got Kentucky, Indiana, western lake Erie, eastern Wisconsin, Ontario and it still has almost a gb of data left.