I removed CF map card from C80 on my Searay 34 2004 and put it back using "remove card" option from C80 menu and it doesn't show detail map any more. I repeated the card removal on my spare C80 which was not connected to the power and has its own CF card and put the card back and after...
So my Sea Ray 300 Weekender came with a big old Garmin 2010C without a software chip. Yes great device if all you need to know is your on the east coast. I plan on using it as a spare anchor if the need arises. My other boat has a Lowrance GPS/Sonar unit with the Navionics Coastal card in it...
Thought I'd share this long winded version of a set of tools I use in conjunction with my GPS Plotter for planning and plotting routes and learning new waters via charts. My boat is equipped with a Garmin GPS3200 series plotter. It has built in maps for the entire US coast and most inland water...