The nautical terms “port” and “starboard” are rooted in centuries of seafaring tradition, evolving from practical needs aboard early ships into standardized language that avoids confusion in critical situations. The word “starboard” comes from the Old English steorbord, meaning “steering side.” In early vessels, long before the invention of the
central rudder, ships were steered using a large oar or steering paddle mounted over the right-hand side of the stern. Because most sailors were right-handed, this steering oar was almost always placed on the right side, and that side naturally became known as the “steer board,” eventually compressed into “starboard.”
This term has remained remarkably consistent over time, surviving linguistic shifts from Old English through Norse influences into modern maritime vocabulary. The opposite side of the ship, now called “port,” went through more changes before settling on its current name. Originally, it was known as the “larboard” side, derived from Old English ladebord, meaning the “loading side.”
This name reflected the fact that ships would dock with their left side facing the harbor to protect the fragile steering oar on the starboard side. However, “larboard” sounded too similar to “starboard,” especially when shouted over wind and waves, which created dangerous confusion in navigation and command. To eliminate this risk, the term “port” was officially adopted in the 19th century,
referencing the side of the ship that faced the port or harbor when moored. Together, “port” and “starboard” form a standardized directional system that is independent of a person’s orientation on the ship, unlike “left” and “right,” which can change depending on which way someone is facing. This consistency is crucial for safety and coordination, particularly in large crews or during emergencies.
A simple way to remember directions on a boat is that “port” and “left” both have four letters, so port is the left side when facing forward, while starboard is the right; another common trick is that port wine is red, matching the red navigation light on the port side, while the starboard side uses a green light, helping reinforce the distinction through color association. These navigation or “running” lights are standardized worldwide, with red on the port side and green on the starboard side, along with a white light at the stern and often a white masthead light, all governed by the International Regulations for Preventing Collisions at Sea to ensure vessels can determine each other’s direction and avoid collisions at night or in low visibility. As for the ends of a vessel, the front is called the bow and the rear is the stern, terms that, like port and starboard, remain constant regardless of which way a person is facing, making communication at sea precise and universally understood
These terms are now universally recognized across maritime and naval operations, preserving a linguistic link to the earliest days of seafaring while continuing to serve a vital practical purpose on modern vessels.
Further Reading
Sources
- National Ocean Service (NOAA) “Why do ships use “port” and “starboard” instead of “left” and “right?”” https://oceanservice.noaa.gov/facts/port-starboard.html
- Wikipedia “Port and starboard” https://en.wikipedia.org/wiki/Port_and_starboard
- Intl Reg “Why do ships use ‘port’ and ‘starboard’ and not ‘left’ or ‘right’” https://intlreg.org/2019/10/08/why-do-ships-use-port-and-starboard-and-not-left-or-right/
- Texas Maritime Museum “Ever Wonder Where the Terms Port and Starboard Come From?” https://texasmaritimemuseum.org/ever-wonder-where-the-terms-port-and-starboard-come-from/
- Drive A Boat USA “Starboard Side and Port Side Explained” https://driveaboatusa.com/blog/starboard-side-and-port-side-explained/
- Boat Covers Direct “Origin of the Terms “Port” and “Starboard”” https://www.boatcoversdirect.com/help/origin-of-the-terms-port-and-starboard
- Royal Museums Greenwich “Port and starboard” Why do sailors say ‘port’ and ‘starboard’ for ‘left’ and ‘right’?” https://www.rmg.co.uk/stories/maritime-history/port-starboard
- Boat-Ed “Which Side Is Starboard vs. Port for a Boat?” https://www.boat-ed.com/blog/which-is-port-vs-starboard-for-a-boat/
- London Maritime Museum “Port and Starboard Explained: Never Confuse Left and Right at Sea Again!” https://www.lmitac.com/articles/port-and-starboard-explained
- Boater Exam “Boat Terminology: What is Port and Starboard on a Boat?” https://www.boaterexam.com/blog/boat-terminology-what-is-port-and-starboard-on-a-boat/
- Saltwater Journal “Beginner’s Guide to Understanding Port and Starboard” https://www.saltwaterjournal.life/blog/port-and-starboard-sides
- My Projects “Why Is It Called Port And Starboard” https://projects.linguistics.ubc.ca/why-is-it-called-port-and-starboard/
- Sailing Anarchy “Origins of “Port” and “Starboard”” https://forums.sailinganarchy.com/threads/origins-of-port-and-starboard.25914/
- Savvy Navvy “What Side of A Boat Is Port?” https://www.savvy-navvy.com/blog/what-side-of-a-boat-is-port
- Boating Partnerships “The Story Behind Port and Starboard” https://boatingpartnerships.com/the-story-behind-port-and-starboard/
- Lake “Port vs Starboard: Boat Sides Explained” https://www.lake.com/articles/starboard-and-port-side/
