Crosjack or Crossjack: How To spell?
The word Crosjack is misspelled against Crossjack, a noun meaning "The lowest square sail, or the lower yard of the mizzenmast."
Crossjack has double "ss" is mispronounced as "s"Remember double 'SS' in between the strings cro & jack which should not be misspelled with single 'S'
Wrong Spelling:  cro-s-jack  Correct Spelling:  cro-ss-jack 
Find more incorrect spellings of Crossjack to spell right way.