Regent Seven Seas Mariner
Frank, if you have the full page on the Westin cam or Gritti Palace cam, they are part of the Room With a View group...click the 'icon' in the upper left corner and you will get a world map with lots of cams. Unfortunately most do not overlook ports...But they have three cams in Venice, this one is the Danieli cam. the Danieli cam page has two supposedly live cams on it, but cam 1 only updates sporadically. CJ
http://www.hoteldanieliview.com/The Crystal Serenity pic a couple posts up is cam 1 of the Danieli cams. My practice is to not open that cam site until I think the ship is in view, in the hopes that cam 1 will be current. It opens on cam 2.