There may be other ways, but the way I do it is this. I go to a travel website that I probaby can't name here specifically, but let's say it is dedicated to cruises . I fill in the search stuff, month, cruise line, itinerary, departure port, select my sailing and act like I'm going to book with number of people and my zip code. You can get through to a screen that shows the prices and categories, and when you select a category it gives you a list of open cabins and the deck plan showing where they are. I do this about once a week keeping tabs of cabins I am targeting hoping for an upgrade opportunity at port.