The word Stersmen is misspelled against Steersmen, which is plural of "Steersman"
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Steersmen has double "ee" is mispronounced as "e"
Remember double 'EE' in between the strings St & rsmen which should not be misspelled with single 'E'
Wrong Spelling:  St-e-rsmen 
Correct Spelling:  St-ee-rsmen 
Explore spell check of Steersmen to spell without errors.