Or get one of those new-fangled thing with your radar, chartplotter, depth sounder, wind speed, log all on the same screen. You can select the one you want to see and enlarge it by just pushing one button.
Problem is you have to push the button with your toes because you will have chewed your finger-nails down to second knuckle waiting for the screen to stop being a screen.
I have often on this board said that notebooks in perfect condition and capable of running charting systems are being thrown in the dustbin all around us. I now have 5 that cost me nothing. No matter how good the raymagarmin is it ain't better than that.
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"Two possibilities exist: Either we are alone in the Universe or we are not. Both are equally terrifying."
Arthur C. Clarke