en_tn_condensed/jas/03/04.md

Notice also that ships ... are steered by a very small rudder

A rudder is a flat piece of wood or metal at the back of the ship, used to control where it goes. The word "rudder" could also be translated as "tool."

are driven by strong winds,

"strong winds push them, they"

are steered by a very small rudder to wherever the pilot desires

"have a small tool that a person can use to control where the ship goes"