"coxswain of" is a correct and usable phrase in written English
It is typically used to describe someone who is in the position of a coxswain, which is the person who steers a rowing boat or other small vessel. Example: John was the skilled coxswain of the university rowing team, leading them to victory in several competitions.
Coxswain of freshman crew '94.
Coxswain of Columbia crew which won regatta at Poughkeepsie 1895.
He graduated from Harvard College in 1959 where he was coxswain of the undefeated varsity heavyweight rowing crew.
Prince Charles, after leaving his ship, Bronington, didn't make any overtures to become the coxswain of the Cromer lifeboat.
In "College," for example, Keaton is the coxswain of a rowing team who manages to overturn and sink his crew's boat.
By Eugene Kinkead and Russell Maloney The New Yorker, July 18 , 1936P. 7 Personality of Robert Gaston Moch, coxswain of the Washington eight-oared crew.
Throw in the rise of Hipsters -- many of whom were geeks or "misunderstood" in high school -- as the new coxswains of culture, and you've got yourself an upside down world that would make any member of Lambda Lambda Lambda proud (or disgusted, depending on their nerd pride).
Ms. Adair was the coxswain for one of the crew boats; Mr. Ackman rowed on a different boat.
Coxswain Bruce Leask, of the Lerwick lifeboat, said they had managed to tow the largest piece of wreckage off the rocks and a rope had been attached to hold it in the shelter of Horse Island until a recovery vessel arrived.
Although it is capable of navigating and avoiding collisions autonomously and can be operated via remote control, Mast had a coxswain on board to take control if needed because of Port of London bylaws, which also limited the speeds at which it could travel.
It was a barn-burner of a race and Lesleh was our coxswain whose years of expertise was apparent.
