Simplify the following text for a Grade 10 native English-speaking person.
Original: The Royal Navy shortened `` master and commander '' to `` commander '' in 1794 ; however , the term `` master and commander '' remained ( unofficially ) in common parlance for several years .
Simplified: The Royal Navy shortened `` Master and commander '' to `` Commander '' in 1794 ; however , the term `` Master and commander '' remained in common use for many years .