No fewer than 26 cruise ships netted perfect scores in 2013 on health inspections conducted as part of the Vessel Sanitation Program operated by the Centers for Disease Control and Prevention.

The inspections, both scheduled and unannounced, are designed to help prevent gastrointestinal illnesses on cruise ships. The inspections are done on all cruise ships carrying at least 13 passengers and operate itineraries that include U.S. ports.

Here are the ships that scored a 100 in 2013 and the date of the perfect inspection.

Ship                              Cruise Line                                     Date

MV Explorer                  V. Ships Leisure U.S.A.                   Dec. 16

Eurodam                       Holland America Line                     Nov. 21

Adventure of the Seas Royal Caribbean International      Nov. 17

Norwegian Epic            Norwegian Cruise Line                  Nov. 16

Carnival Paradise         Carnival Cruise Lines                    Nov. 7

Carnival Liberty             Carnival Cruise Lines                     Nov. 2

Royal Princess             Princess Cruises                             Oct. 29

Seabourn Sojourn        Seabourn                                          Oct. 28

Nieuw Amsterdam        Holland America Line                    Oct. 27

Carnival Freedom        Carnival Cruise Lines                     Oct. 14

Norwegian Sky              Norwegian Cruise Line                  Oct. 11

Celebrity Solstice         Celebrity Cruises                              Oct. 3

Volendam                      Holland America Line                       Sept. 20

Oasis of the Seas        Royal Caribbean International        Aug. 31

Star Princess                Princess Cruises                              Aug. 10

Carnival Victory            Carnival Cruise Lines                        July 27

Norwegian Gem           Norwegian Cruise Line                    July 20

Zaandam                       Holland America Line                        July 14

Disney Dream              Disney Cruise Line                             June 23

Carnival Dream             Carnival Cruise Lines                       June 22

Rhapsody of the Seas Royal Caribbean International         May 11

Celebrity Eclipse                   Celebrity Cruises                       April 9

Silver Spirit                              Silversea Cruises                     April 5

Celebrity Reflection     Celebrity Cruises                                March 23

Navigator of the Seas  Royal Caribbean International         Feb. 16

Carnival Sensation       Carnival Cruise Lines                       Feb. 3

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