We also use Nobeltec/Passport charts on this computer for navigation. It's our primary navigation and planning system. When we cross oceans, we don't need, it obviously, but it could be on for hours at a time going from say Portobello to the San Blas! And yes, we have a "real" inverter, but it takes amps out of the house bank and my dear husband, the amp ogre, complains mightily!
And yes, I admit to being addicted to my computer - I love writing and I love playing with photos I take, so no debate here!
Tell Rey we said HI! And we didn't even have to do it in passing in the laundry room at Shelter Bay Marina.
Cheers! Jan