[jerryRiggin]

I don't have experience with 1yachtua but we used the Navionics charts on our tablet our whole cruising trip through the Caribbean and Bahamas. Freaking loved it! Inexpensive, accurate, wouldn't have traded it for anything.

Now they also have an app for Windows8.1 so makes it easy to plan while on your computer.
http://apps.microsoft.com/windows/en-us/app/dd337be9-0db8-4ee7-b2be-c5a6ccca5795