I recently used an Android system tablet (Acer) on board the Navigator and it worked great. It does have a USB port and I was able to load pics directly from the camera, edit and post on Facebook and attach them to emails. I was able to get an internet connection almost everywhere on the ship, but did have a bit of trouble in Galileo's.

Diamond 10/99
Song of Flower 02/00
Mariner 03/01 Maiden Voyage
Mariner 09/04
Mariner 11/05
Mariner 07/07
Voyager 04/08
Mariner 10/08
Navigator 11/09
Mariner 12/09
Navigator 11/10
Navigator 10/11
Mariner 1/12
Navigator 4/13
Voyager 12/14