January 29, 2008 16:24
Roger, I also use a 13" mac laptop It's down below at the nav station. My ibook G4 came with an adaptor to plug into house power. The adaptor supplies the working power and recharges the battery. I purchased an $ 25 inverter which changes my boat's 12 VDC to 120 VAC 60 hertz. I simply plug the inverter into a 12 VDC source and the Mac Adaptor into the inverter. Voilla! I have a fully powered Mac running MacENC. I use a USB powered GPS that plugs directly into my ibook's USB port and I have a fully functional chart plotter with a readable sized screen. Works great. I didn't have to fuss about with the apple airplane adaptor.