From what I've read here, I think the only way to find out about dry docks is to look for a "missing" week on the schedule for the Legend on the Carnival website.
Hope someone else can help you more!
Have a great cruise!
"A truly happy person is one who can enjoy the scenery on a detour."
I have done many searches and I cannot find out anything. How about calling Carnival?
SS Norway (12 times) '85 - '97; Radiance OS 06/01; Island Princess 11/04, Grand Princess 11/04/05, Golden Princess 7/21/06, Golden Princess 2/24/07, Explorer of the Seas 12/23/07, Island Princess 11/15/08