Man Plans to Run a Marathon While On a Cruise Ship - Destination Tips
A GPS on the bridge of an Antarctic cruise ship showing the latitude and logitude when the ship reached the polar circle Stock Photo - Alamy
World's largest cruise ship is so vast that guests will have to use GPS to find rooms | Daily Mail Online
Marseilles, France - 20 June 2013. Modern cruise ships have extremely sophisticated GPS, electronic, radar and navigation systems. You can see some of Stock Photo - Alamy
World Navigator Itinerary, Current Position, Ship Review | CruiseMapper