Stersman or Steersman: How To spell?
The word Stersman is misspelled against Steersman, a noun meaning "One who steers; the helmsman of a vessel."
Steersman has double "ee" is mispronounced as "e"Remember double 'EE' in between the strings St & rsman which should not be misspelled with single 'E'
Wrong Spelling:  St-e-rsman  Correct Spelling:  St-ee-rsman 
Explore spell check of Steersman to spell without errors.