Video: Up In The Air: 16 Decks Above The Sea On The SeaWalk on Royal Princess June 16, 2013 By Ralph Grizzle 4 Comments Share this post with a friend ... 1000A new innovation, the SeaWalk on Royal Princess extends 28 feet beyond the side of the ship. © 2013 Ralph Grizzle Cantilevered 28 feet beyond the edge of the new Royal Princess and 128 feet over the water, the SeaWalk invites you for a stroll. Trouble viewing the video? Click here. Have you read A Royal Affair In Southampton: The Duchess of Cambridge, Kate Middleton, Christens Royal Princess?