Yes, the ship sinks. Happily, the musical does not. 'Titanic,' that is, now onstage with a cast of 37 at Northern Kentucky University. Composer-lyricist Maury Yeston and author Peter Stone have created a show with close to continuous music, solos for more than 20 people, huge choral numbers and frequent shifts of scene from bow to stern. The cast members are nicely matched to their music and to each other.