Port and starboard are nautical and aeronautical terms for left and right, respectively. Port is the left-hand side of a vessel or aircraft, facing forward. Starboard is the right-hand side, facing forward. Since port and starboard never change, they are unambiguous references that are not relative to the observer.
Unlike left and right, "port" and "starboard" refer to fixed locations on a vessel. In the early days of boating, before ships had rudders on their centerlines, boats were controlled using a steering oar. Most sailors were right handed, so the steering oar was placed over or through the right side of the stern.
Port and Starboard. If you are standing in the rear of the boat looking forward, the entire right side of the boat is the starboard side; the entire left side is the port side. The front right side of the boat is the starboard bow; the front left is the port bow. The right rear of the boat is the starboard quarter; the left rear is the port quarter.
Port and starboard. Port and starboard are nautical terms for left and right, respectively. Port is the left-hand side of or direction from a vessel, facing forward. Starboard is the right-hand side, facing forward. Since port and starboard never change, they are clear references that do not depend on which way the observer is facing.
Starboard side. The right side of a pleasure craft when looking forward. A trick to remember which side port and starboard each refer to: The common abbreviation P.S. (for English postscript, derived from Latin post scriptum) can be viewed as port ("left") and starboard ("right").