There are 73 * background images that rotate on Roll Call.
The best way to watch them is without selecting a cruise line. So start from here:
rollcall/rollcall.php
And then press X ** on your keyboard for the next image. It may take a second to load because these are large images - by design, because I wanted the background to be pretty. It's the only image used on Roll Call. Everything else is just text.
If you don't press X, the slideshow automatically changes every 15 seconds.
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* I just added the Queen Mary 2 in Quebec City today.
** It's not N because originally, N was for Next trip!