[reelapeelin]

Chartplotters give you a nautical ''map'' of your surroundings...you can ''see'' where you are and where other features are like shorelines, bouys, bottom-contours and more...GPS is the navigational tool to get you from one place on the chart to another...one thing it does is give you a compass ''heading'' to follow and a ''plotted'' line that shows where you've been; which you can ''mark'' and return to in case you caught fish there or you think highly enough of the drunk who fell outta the boat to go back and get him... ::)...