Spotter mode. It's a Princess Cruises 'Grand' Class. I can't tell which one of three (?) possibles. 'Grand Princess' was first of class, called the shopping trolley because of the big 'handle' at the back ( IIRC a disco!) Uberspotter mode, it's not a liner, it's a cruise ship (shallow draft and not nearly as fast). I'll get my anorak!