In general, regardless of wind and current, when the ship moves forward, the rudder is left and the bow is left, but the hull swings to the right. If you are reversing, the stern is left, the bow is right and the hull is right.
Rudder is used to manipulate and control the course of a ship, usually located at the stern, also called stern rudder. This is an important invention of shipbuilding technology in China. An ancient device used to steer and control the course of a ship. It usually consists of rudder blade, vertical rudder stock and horizontal rudder stock. Because the rudder controls the course of the ship, it has evolved into a feng shui mascot, symbolizing smooth sailing, braving the wind and waves, making Man Cang rich, making people's career smooth and freely grasping the future direction of life.
The origin of rudder
Judging from the unearthed cultural relics, the rudder evolved from paddles. Paddles can be used as propulsion tools to control the course, but when many paddlers row, it is quite difficult to control the course and propel, so a paddler is specially set up to control the course. He is located at the stern, because the stern is far away from the center of rotation of the ship, so it is the most labor-saving and quick to change the course of the ship, and at the same time it does not interfere with the advancing paddlers. Later, the hull was enlarged, the blade area was increased, and the rudder was gradually produced.
Rudder was used in Shang Dynasty, which was explained in Xu Shen's Shuo Wen Jie Zi and Liu Xi's Shi Ming in the Eastern Han Dynasty, indicating that rudder was widely used at that time. In the Tang and Song Dynasties, the stern rudder became more and more perfect and mature. The Riverside Scene at Qingming Festival vividly depicts more than 20 passenger ships, cargo ships, oil tankers and ferries sailing on the Canal River in the capital, which reflects the superb manufacturing technology of inland ships at that time. At the same time, it can be seen that the advanced rudder still in use today was widely used at that time. Later, the ship added a steering gear, which consists of pulleys and ropes.