MIAMI -- A byzantine maze of maritime rules and regulations, fragmented oversight and a patchwork quilt of nations that do business with cruise lines make it tough for consumers to assess the health and safety record of the ship they're about to board for what may be the vacation of a lifetime.Want to know about a ship's track record for being clean? Want to assess how sanitary the food is? It's not that easy to find, in part because there's no one entity or country that oversees or regulates the industry with its fleet of ships that are like mini-cities floating at sea.In the case of Carnival Cruise Lines, the owner of the Carnival Triumph, which spent days in the Gulf of Mexico disabled after an engine fire, the company is incorporated in Panama, its offices are based in Miami, and its ships fly under the Bahamian flag -- a matrix that is not unusual in the cruise line industry.For potential passengers seeking ship information, there's no central database that can be viewed to determine a track record of safety or health inspections. No one agency regulates everything, from the cruise line's mechanical worthiness to the sanitation of its kitchens.The U.S. Coast Guard inspects each cruise ship that docks in the U.S. every year for a range of issues, from operation of backup generators to the lifeboats. The Centers for Disease Control and Prevention maintain a database of recent disease outbreaks and other health inspection information for cruise ships. Had Triumph vacationers looked up information about the cruise ship through those two agencies before boarding, they would have found mostly clean marks and few red flags.And when something goes wrong, as it did on Triumph, there are limits to how much the Coast Guard can investigate.These are not new issues -- they had been raised by members of Congress before the Triumph incident."This horrible situation involving the Carnival Triumph is just the latest example in a long string of serious and troubling incidents involving cruise ships," said Sen. Jay Rockefeller, D-W.Va., who led a committee hearing on cruise safety last year.Last year, after the Costa Concordia ran aground off the coast of Giglio, Italy, Rockefeller held a Commerce Committee hearing to examine deficiencies in the cruise line industry's compliance with federal safety, security, and environmental standards and review industry regulations."As I remarked then, they seem to have two lives: One is at port, where the Coast Guard can monitor their operations; the other is at sea, where it appears once they are beyond three nautical miles from shore, the world is theirs," Rockefeller said in letter he wrote this week to Adm. Robert J. Papp Jr., the commandant of the Coast Guard. "The Carnival Triumph incident only serves to further validate this view."The Triumph left Galveston on Feb. 7 for a four-day cruise to Cozumel, Mexico. An engine-room fire paralyzed the ship early Sunday, leaving it adrift in the Gulf of Mexico. Passengers described nightmarish conditions onboard: overflowing toilets, long lines for a short supply of food, foul odors and tent cities where vacationers slept on deck. Before a ship like the Triumph sets sail, it's possible -- but not easy -- to find information about past incidents and safety or health issues. The CDC's Vessel Sanitation Program is viewable online. The database shows recent disease outbreaks aboard cruise ships and how they were addressed.Records for the Triumph show it was last inspected July 7, 2012. It scored 96 out of 100. The CDC considers scores of 85 or lower unsatisfactory.The Coast Guard also has a database, known as the U.S. Coast Guard Maritime Information Exchange, with inspections and any deficiencies found aboard ships, dating to when the vessels entered service.A search on the exchange's website for the Triumph turns up its certifications for things like passenger safety and pollution prevention as well as inspections. No violations or red flags are immediately evident.