Narita airport to Yokosuka by express

I want to know how to get from Narita airport to Yokosuka using the JR Narita Express. When, How, and are there any train changes or is it a direct ride. Thanks

1) Take the Narita Express to Ofuna
2) Take the JR Yokosuka Line from Ofuna to Yokosuka

You can look up timetables below:
http://www.jreast.co.jp/e/nex/
http://www.jorudan.co.jp/english/norikae/

Uji provided the best answer, I would take the Narita Express then change.

There is however a direct train, but it is not a Narita Express train, it is the Normal JR Rapid train (about once an hour) that goes Direct. This train however is considerably slower because it makes more stops. The NEX would be the way to go.

BTW, if you're going to Yokosuka Naval Base, Yokosuka JR Station is not near the base. If you are going to the base I can give you a slightly modified schedule if you want that would get you closer.