QUESTION: How old do you have to be to be a captain? Maddie R. Mrs. Garvin's Class Mauldin Elementary Mauldin. SC ANSWER from Janet Barnes, Aboard the RV Polar Duke Sat, 5 Apr 1997 17:30:34 +0000 (GMT) Dear Maddie, It takes years of experience and schooling to become a Captain on the Polar Duke. If you were very talented and studied very hard, you could probably become a Captain by the time you were 30. Thanks for your unique question! Janet Barnes