UnScramble this Word: o d a k p c s l?

Questions

what four letters were placed on the cross on which christ was crucified??

what's a us sailor's job if he wears a "c" on his sleeve??

what 1988 film sequel brings its characters back to earth from antarea??

what disney movie featured the song march of the cards??

a legend, his biggest hit was "bluberry hill" which failed to reach #1?