I was told, but never had to use it (thankfully) that linking reservations would also assist should you have to use your cruise insurance. Example- 2 couples sail together, it's after final payment and one has a health issue that prevents them from traveling. Both couples would be able to cancel under that. Like I said, I've never had to put that to the test so I don't really know if that is 100%.
All my children grow their own clothes.
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Meet & Mingle Thread - http://boards.cruisecritic.com/showthread.php?t=1772258
Mariner - Western Caribbean - May 2007
Mariner - Eastern Caribbean - March 2008
Monarch - Bahamas - May 2009
Rhapsody - Alaska - May 2010
Freedom - Western Caribbean - April 2011
Adventure - Southern Caribbean - March 2012
Allure - Western Caribbean - May 2013