conning officer
Typically, the captain or commanding officer of the vessel orders the course for the helmsman to steer. Alternatively, the officer of the deck may also issue the course to be steered by the helmsman under the direction of the captain.
The 'helmsman' steers a submarine.
helmsman
According to Pirate's Hold, the Helmsman steers the ship.
Helmsman
"Helmsman".
Navigator. The person who actually steers the ship is sometimes called the helmsman.
a helm or a helms man is a person who steers the boot or submarine
In ships or ferries, the person who steers is called a helmsman. In relatively small boats, the person that steers the boat is called a skipper.
The proper submarine/naval term is the Helmsman, who controls the rudder and dive planes.
Rowing. The cox also is responsible for steering a sailing ship. A Helmsman.
It could be anyone. But mainly the helmsman, but it could be the Skipper (Captain) if it's a small sport boat like a bow-rider. But normally the owner of the boat or person hired to Captain the boat drives the boat or the helmsman.
The captain or those officers under his orders.