Helmsman

A helmsman is a person who steers a ship and many types of boats. In the merchant Marine, this is usually an able seaman. In the Marines, it is a seaman or a quartermaster.

In the Series
In the series, the only known helmsman of any crew is Jesus Burgess of the Blackbeard Pirates. After two years, Burgess is promoted to becoming the captain of the Blackbeard Pirates' first ship; it is unknown if he remains as a helmsman.

The Straw Hat Pirates do not have an official helmsman, though the most common people seen steering the ship is either Nami, Usopp, or Chopper in his human form. However, Franky and Sanji have also been seen steering the Thousand Sunny many times. Jinbe also has some skill at steering a ship.