A controversial federal charter of three cruise ships for hurricane housing is yielding Carnival Cruise Lines far more than the ships earned in actual cruise operations, a key congressman charged on Thursday, according to a report on Sun-Sentinel.com. Rep. Henry Waxman, D-Calif., said the cruise line got about $25 million a month in revenue from the three ships, based on an internal Carnival financial document from 2002. The ships were chartered to the federal government shortly after Hurricane Katrina at a cost of $192 million for six months. The figures suggest a gap of at least $42 million between what Carnival is getting under the Sept. 2 charter and what it earned from the ships in 2002.