Military Sealift Command hospital ship USNS Comfort's Medical Treatment Facility changed leadership May 25 as Navy Capt. Kevin J. Knoop assumed command from Navy Capt. David K. Weiss during a ceremony aboard Comfort at Canton Pier in Baltimore. Comfort's primary mission is to serve as an afloat, mobile, acute-surgical medical facility to the U.S. military, with a secondary mission of providing hospital services for disaster relief and humanitarian operations worldwide. Comfort's Medical Treatment Facility, or MTF, is crewed and maintained by medical personnel from the U.S.